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Huo WC, Liu XL, Yuan YS, Li N, Lan T, Liu XY, Zhang YX. Facile Synthesis of Manganese Cobalt Oxide/Nickel Cobalt Oxide Composites for High-Performance Supercapacitors. Front Chem 2019; 6:661. [PMID: 30705880 PMCID: PMC6344439 DOI: 10.3389/fchem.2018.00661] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 12/19/2018] [Indexed: 12/03/2022] Open
Abstract
Transition metal oxides (TMOs) with spinel structures have a promising potential as the electrode materials for supercapacitors application owning to its outstanding theoretical capacity, good redox activity, and eco-friendly feature. In this work, MnCo2O4.5@NiCo2O4 nanowire composites for supercapacitors has been successfully fabricated by using a mild hydrothermal approach without any surfactant. The morphology and physicochemical properties of the prepared products can be well-controlled by adjusting experimental parameters of preparation. The double spinel composite exhibits a high specific capacitance of 325 F g−1 (146 C g−1) and 70.5% capacitance retention after 3,000 cycling tests at 1 A g−1.
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Affiliation(s)
- Wang Chen Huo
- State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Xiao Li Liu
- State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Yun Song Yuan
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
| | - Nan Li
- Aerospace Institute of Advanced Materials & Processing Technology, Beijing, China
| | - Tian Lan
- Aerospace Institute of Advanced Materials & Processing Technology, Beijing, China
| | - Xiao Ying Liu
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, China
| | - Yu Xin Zhang
- State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing, China
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2
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Qin J, Wu ZS, Zhou F, Dong Y, Xiao H, Zheng S, Wang S, Shi X, Huang H, Sun C, Bao X. Simplified fabrication of high areal capacitance all-solid-state micro-supercapacitors based on graphene and MnO2 nanosheets. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.08.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Jing C, Liu X, Liu X, Jiang D, Dong B, Dong F, Wang J, Li N, Lan T, Zhang Y. Crystal morphology evolution of Ni–Co layered double hydroxide nanostructure towards high-performance biotemplate asymmetric supercapacitors. CrystEngComm 2018. [DOI: 10.1039/c8ce01607k] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hierarchical three-dimensional (3D) porous structures of nickel–cobalt layered double hydroxide (LDH) are grown on diatomite biotemplate via one-step hydrothermal method.
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Affiliation(s)
- Chuan Jing
- State Key Laboratory of Mechanical Transmissions
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- P.R. China
| | - Xiaoli Liu
- State Key Laboratory of Mechanical Transmissions
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- P.R. China
| | - Xiaoying Liu
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- P.R. China
| | - Debin Jiang
- State Key Laboratory of Mechanical Transmissions
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- P.R. China
| | - Biqin Dong
- School of Civil Engineering
- Guangdong Province Key Laboratory of Durability for Marine Civil Engineering
- The Key Laboratory on Durability of Civil Engineering in Shenzhen
- Shenzhen University
- Shenzhen 518060
| | - Fan Dong
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- P.R. China
| | - Jinshu Wang
- School of Materials and Energy
- University of Electronic Science and Technology of China
- Chengdu 611731
- P. R. China
| | - Nan Li
- Aerospace Institute of Advanced Materials & Processing Technology
- Beijing 100074
- P. R. China
| | - Tian Lan
- Aerospace Institute of Advanced Materials & Processing Technology
- Beijing 100074
- P. R. China
| | - Yuxin Zhang
- State Key Laboratory of Mechanical Transmissions
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- P.R. China
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4
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Ma X, Feng S, He L, Yan M, Tian X, Li Y, Tang C, Hong X, Mai L. Rapid, all dry microfabrication of three-dimensional Co 3O 4/Pt nanonetworks for high-performance microsupercapacitors. NANOSCALE 2017; 9:11765-11772. [PMID: 28783194 DOI: 10.1039/c7nr01789h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
On-chip electrochemical energy storage devices have attracted growing attention due to the decreasing size of electronic devices. Various approaches have been applied for constructing the microsupercapacitors. However, the microfabrication of high-performance microsupercapacitors by conventional and fully compatible semiconductor microfabrication technologies is still a critical challenge. Herein, unique three-dimensional (3D) Co3O4 nanonetwork microelectrodes formed by the interconnection of Co3O4 nanosheets are constructed by controllable physical vapor deposition combined with rapid thermal annealing. This construction process is an all dry and rapid (≤5 minutes) procedure. Afterward, by sputtering highly electrically conductive Pt nanoparticles on the microelectrodes, the 3D Co3O4/Pt nanonetworks based microsupercapacitor is fabricated, showing a high volume capacitance (35.7 F cm-3) at a scan rate of 20 mV s-1 due to the unique interconnected structures, high electrical conductivity and high surface area of the microelectrodes. This microfabrication process is also used to construct high-performance flexible microsupercapacitors, and it can be applied in the construction of wearable devices. The proposed strategy is completely compatible with the current semiconductor microfabrication and shows great potential in the applications of the large-scale integration of micro/nano and wearable devices.
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Affiliation(s)
- Xinyu Ma
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, P. R. China.
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5
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Hu H, Pei Z, Fan H, Ye C. 3D Interdigital Au/MnO2 /Au Stacked Hybrid Electrodes for On-Chip Microsupercapacitors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:3059-69. [PMID: 27116677 DOI: 10.1002/smll.201503527] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/02/2016] [Indexed: 05/13/2023]
Abstract
On-chip microsupercapacitors (MSCs) have application in powering microelectronic devices. Most of previous MSCs are made from carbon materials, which have high power but low energy density. In this work, 3D interdigital Au/MnO2 /Au stacked MSCs have been fabricated based on laser printed flexible templates. This vertical-stacked electrode configuration can effectively increase the contact area between MnO2 active layer and Au conductive layer, and thus improve the electron transport and electrolyte ion diffusion, resulting in enhanced pseudocapacitive performance of MnO2 . The stacked electrode can achieve an areal capacitance up to 11.9 mF cm(-2) . Flexible and all-solid-state MSCs are assembled based on the sandwich hybrid electrodes and PVA/LiClO4 gel electrolyte and show outstanding high-rate capacity and mechanical flexibility. The laser printing technique in this work combined with the physical sputtering and electrodeposition allows fabrication of MSC array with random sizes and patterns, making them promising power sources for small-scale flexible microelectronic energy storage systems (e.g., next-generation smart phones).
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Affiliation(s)
- Haibo Hu
- Anhui Key Laboratory of Nanomaterials and Technology and Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
| | - Zhibin Pei
- Anhui Key Laboratory of Nanomaterials and Technology and Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
| | - Hongjin Fan
- School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, Singapore
| | - Changhui Ye
- Anhui Key Laboratory of Nanomaterials and Technology and Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
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Gaboriau D, Aradilla D, Brachet M, Le Bideau J, Brousse T, Bidan G, Gentile P, Sadki S. Silicon nanowires and nanotrees: elaboration and optimization of new 3D architectures for high performance on-chip supercapacitors. RSC Adv 2016. [DOI: 10.1039/c6ra14806a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micro-supercapacitors are increasingly foreseen as future energy storage or power buffer solutions for small scale integration on-chip. This study develops optimized silicon nanotrees as an innovative electrode material.
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Affiliation(s)
- D. Gaboriau
- Univ. Grenoble Alpes
- INAC-SPRAM
- F-38000 Grenoble
- France
- CNRS
| | - D. Aradilla
- Univ. Grenoble Alpes
- INAC-SPRAM
- F-38000 Grenoble
- France
- CNRS
| | - M. Brachet
- Institut des Matériaux Jean Rouxel
- Université de Nantes – CNRS
- 44322 Nantes Cedex 3
- France
| | - J. Le Bideau
- Institut des Matériaux Jean Rouxel
- Université de Nantes – CNRS
- 44322 Nantes Cedex 3
- France
| | - T. Brousse
- Institut des Matériaux Jean Rouxel
- Université de Nantes – CNRS
- 44322 Nantes Cedex 3
- France
| | - G. Bidan
- Univ. Grenoble Alpes
- INAC-SPRAM
- F-38000 Grenoble
- France
- CNRS
| | - P. Gentile
- Univ. Grenoble Alpes
- INAC-SP2M
- F-38000 Grenoble
- France
- CEA
| | - S. Sadki
- Univ. Grenoble Alpes
- INAC-SPRAM
- F-38000 Grenoble
- France
- CNRS
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Han J, Lin YC, Chen L, Tsai YC, Ito Y, Guo X, Hirata A, Fujita T, Esashi M, Gessner T, Chen M. On-Chip Micro-Pseudocapacitors for Ultrahigh Energy and Power Delivery. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1500067. [PMID: 27980943 PMCID: PMC5115376 DOI: 10.1002/advs.201500067] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Indexed: 05/25/2023]
Abstract
Microscale supercapapcitors based on hierarchical nanoporous hybrid electrodes consisting of 3D bicontinuous nanoporous gold and pseudocapacitive manganese oxide deliver an excellent stack capacitance of 99.1 F cm-3 and a high energy density of 12.7 mW h cm-3 with a retained high power density of 46.6 W cm-3.
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Affiliation(s)
- Jiuhui Han
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Yu-Ching Lin
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Luyang Chen
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Yao-Chuan Tsai
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan; MEMSCORE Cooperation Sendai 981-3206 Japan
| | - Yoshikazu Ito
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Xianwei Guo
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Akihiko Hirata
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Takeshi Fujita
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan
| | - Masayoshi Esashi
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan; Micro System Integration Center Tohoku University Sendai 980-0845 Japan
| | - Thomas Gessner
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan; Fraunhofer Institute for Electronic Nano Systems Chemnitz 09126 Germany
| | - Mingwei Chen
- WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577 Japan; State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200030 P. R China; CRESTJST 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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9
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Hong SY, Yoon J, Jin SW, Lim Y, Lee SJ, Zi G, Ha JS. High-density, stretchable, all-solid-state microsupercapacitor arrays. ACS NANO 2014; 8:8844-8855. [PMID: 25137479 DOI: 10.1021/nn503799j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the successful fabrication of stretchable microsupercapacitor (MSC) arrays on a deformable polymer substrate that exhibits high electrochemical performance even under mechanical deformation such as bending, twisting, and uniaxial strain of up to 40%. We designed the deformable substrate to minimize the strain on MSCs by adopting a heterogeneous structure consisting of stiff PDMS islands (on which MSCs are attached) and a soft thin film (mixture of Ecoflex and PDMS) between neighboring PDMS islands. Finite element method analysis of strain distribution showed that an almost negligible strain of 0.47% existed on the PDMS islands but a concentrated strain of 107% was present on the soft thin film area under a uniaxial strain of 40%. The use of an embedded interconnection of the liquid metal Galinstan helped simplify the fabrication and provided mechanical stability under deformation. Furthermore, double-sided integration of MSCs increased the capacitance to twice that of MSCs on a conventional planar deformable substrate. In this study, planar-type MSCs with layer-by-layer assembled hybrid thin film electrodes of MWNT/Mn3O4 and PVA-H3PO4 electrolyte were fabricated; when they are integrated into a circuit, these MSCs increase the output voltage beyond the potential of the electrolyte used. Therefore, various LEDs that require high voltages can be operated under a high uniaxial strain of 40% without any decrease in their brightness. The results obtained in this study demonstrate the high potential of our stretchable MSC arrays for their application as embedded stretchable energy storage devices in bioimplantable and future wearable nanoelectronics.
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Affiliation(s)
- Soo Yeong Hong
- Department of Chemical and Biological Engineering, ‡KU-KIST Graduate School of Converging Science and Technology, and §Department of Civil, Environmental and Architectural Engineering, Korea University , Seoul 136-701, Republic of Korea
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Wang X, Lu X, Liu B, Chen D, Tong Y, Shen G. Flexible energy-storage devices: design consideration and recent progress. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4763-82. [PMID: 24913891 DOI: 10.1002/adma.201400910] [Citation(s) in RCA: 437] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Indexed: 05/13/2023]
Abstract
Flexible energy-storage devices are attracting increasing attention as they show unique promising advantages, such as flexibility, shape diversity, light weight, and so on; these properties enable applications in portable, flexible, and even wearable electronic devices, including soft electronic products, roll-up displays, and wearable devices. Consequently, considerable effort has been made in recent years to fulfill the requirements of future flexible energy-storage devices, and much progress has been witnessed. This review describes the most recent advances in flexible energy-storage devices, including flexible lithium-ion batteries and flexible supercapacitors. The latest successful examples in flexible lithium-ion batteries and their technological innovations and challenges are reviewed first. This is followed by a detailed overview of the recent progress in flexible supercapacitors based on carbon materials and a number of composites and flexible micro-supercapacitors. Some of the latest achievements regarding interesting integrated energy-storage systems are also reviewed. Further research direction is also proposed to surpass existing technological bottle-necks and realize idealized flexible energy-storage devices.
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Affiliation(s)
- Xianfu Wang
- State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science, Beijing, 100083, PR China; Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, 430074, PR China
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11
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Yu D, Goh K, Wang H, Wei L, Jiang W, Zhang Q, Dai L, Chen Y. Scalable synthesis of hierarchically structured carbon nanotube-graphene fibres for capacitive energy storage. NATURE NANOTECHNOLOGY 2014; 9:555-62. [PMID: 24813695 DOI: 10.1038/nnano.2014.93] [Citation(s) in RCA: 530] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 04/08/2014] [Indexed: 05/20/2023]
Abstract
Micro-supercapacitors are promising energy storage devices that can complement or even replace batteries in miniaturized portable electronics and microelectromechanical systems. Their main limitation, however, is the low volumetric energy density when compared with batteries. Here, we describe a hierarchically structured carbon microfibre made of an interconnected network of aligned single-walled carbon nanotubes with interposed nitrogen-doped reduced graphene oxide sheets. The nanomaterials form mesoporous structures of large specific surface area (396 m(2) g(-1)) and high electrical conductivity (102 S cm(-1)). We develop a scalable method to continuously produce the fibres using a silica capillary column functioning as a hydrothermal microreactor. The resultant fibres show a specific volumetric capacity as high as 305 F cm(-3) in sulphuric acid (measured at 73.5 mA cm(-3) in a three-electrode cell) or 300 F cm(-3) in polyvinyl alcohol (PVA)/H(3)PO(4) electrolyte (measured at 26.7 mA cm(-3) in a two-electrode cell). A full micro-supercapacitor with PVA/H(3)PO(4) gel electrolyte, free from binder, current collector and separator, has a volumetric energy density of ∼6.3 mWh cm(-3) (a value comparable to that of 4 V-500 µAh thin-film lithium batteries) while maintaining a power density more than two orders of magnitude higher than that of batteries, as well as a long cycle life. To demonstrate that our fibre-based, all-solid-state micro-supercapacitors can be easily integrated into miniaturized flexible devices, we use them to power an ultraviolet photodetector and a light-emitting diode.
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Affiliation(s)
- Dingshan Yu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Kunli Goh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Hong Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Li Wei
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Wenchao Jiang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 1 Tsinghua Road, Beijing 100084, China
| | - Liming Dai
- Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Yuan Chen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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Liu C, Li Z, Zhang Z. Molybdenum oxide film with stable pseudocapacitive property for aqueous micro-scale electrochemical capacitor. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.115] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park S, Nam I, Kim GP, Han JW, Yi J. Hybrid MnO2 film with agarose gel for enhancing the structural integrity of thin film supercapacitor electrodes. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9908-9912. [PMID: 24080145 DOI: 10.1021/am403532m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the fabrication of a robust hybrid film containing MnO2 for achieving large areal capacitances. An agarose gel, as an ion-permeable and elastic layer coated on a current collector, plays a key role in stabilizing the deposited pseudocapacitive MnO2. Cyclic voltammetry and electrochemical impedance spectroscopy data indicate that the hybrid electrode is capable of exhibiting a high areal capacitance up to 52.55 mF cm(-2), with its superior structural integrity and adhesiveness to the current collector being maintained, even at a high MnO2 loading.
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Affiliation(s)
- Soomin Park
- World Class University (WCU) program of Chemical Convergence for Energy & Environment (C2E2), Institute of Chemical Processes, School of Chemical and Biological Engineering, College of Engineering, Seoul National University , Seoul, 151-742, Republic of Korea
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Liu W, Yan X, Chen J, Feng Y, Xue Q. Novel and high-performance asymmetric micro-supercapacitors based on graphene quantum dots and polyaniline nanofibers. NANOSCALE 2013; 5:6053-62. [PMID: 23720009 DOI: 10.1039/c3nr01139a] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In comparison with graphene sheets, graphene quantum dots (GQDs) exhibit novel chemical/physical properties including nanometer-size, abundant edge defects, good electrical conductivity, high mobility, chemical inertia, stable photoluminescence and better surface grafting, making them promising for fabricating various novel devices. In the present work, an asymmetric micro-supercapacitor, using GQDs as negative active material and polyaniline (PANI) nanofibers as positive active material, is built for the first time by a simple and controllable two-step electro-deposition on interdigital finger gold electrodes. Electrochemical measurements reveal that the as-made GQDs//PANI asymmetric micro-supercapacitor has a more excellent rate capability (up to 1000 V s(-1)) than previously reported electrode materials, as well as faster power response capability (with a very short relaxation time constant of 115.9 μs) and better cycling stability after 1500 cycles in aqueous electrolyte. On this basis, an all-solid-state GQDs//PANI asymmetric micro-supercapacitor is fabricated using H3PO4-polyvinyl alcohol gel as electrolyte, which also exhibits desirable electrochemical capacitive performances. These encouraging results presented here may open up new insight into GQDs with highly promising applications in high-performance energy-storage devices, and further expand the potential applications of GQDs beyond the energy-oriented application of GQDs discussed above.
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Affiliation(s)
- Wenwen Liu
- Laboratory of clean energy chemistry and materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Nam I, Park S, Kim GP, Park J, Yi J. Transparent and ultra-bendable all-solid-state supercapacitors without percolation problems. Chem Sci 2013. [DOI: 10.1039/c3sc22011g] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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