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Xie KF, Huang Y, Li SZ, Li LL, Dong WK. AN INVESTIGATION INTO THE IMPACT OF INTRODUCED THIOCYANATE ANIONS ON THE TRINUCLEAR Co(II) SALAMO-BASED COMPLEX. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622080078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yoon J, Huang F, Shin KH, Sohn JI, Hong WK. Effects of Applied Voltages on the Charge Transport Properties in a ZnO Nanowire Field Effect Transistor. Materials (Basel) 2020; 13:E268. [PMID: 31936145 DOI: 10.3390/ma13020268] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/23/2019] [Accepted: 12/31/2019] [Indexed: 01/30/2023]
Abstract
We investigate the effect of applied gate and drain voltages on the charge transport properties in a zinc oxide (ZnO) nanowire field effect transistor (FET) through temperature- and voltage-dependent measurements. Since the FET based on nanowires is one of the fundamental building blocks in potential nanoelectronic applications, it is important to understand the transport properties relevant to the variation in electrically applied parameters for devices based on nanowires with a large surface-to-volume ratio. In this work, the threshold voltage shift due to a drain-induced barrier-lowering (DIBL) effect was observed using a Y-function method. From temperature-dependent current-voltage (I-V) analyses of the fabricated ZnO nanowire FET, it is found that space charge-limited conduction (SCLC) mechanism is dominant at low temperatures and low voltages; in particular, variable-range hopping dominates the conduction in the temperature regime from 4 to 100 K, whereas in the high-temperature regime (150–300 K), the thermal activation transport is dominant, diminishing the SCLC effect. These results are discussed and explained in terms of the exponential distribution and applied voltage-induced variation in the charge trap states at the band edge.
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Majumdar D, Dey S, Sreekumar SS, Das S, Das D, Metre RK, Bankura K, Mishra D. Nitrato, Pseudohalo‐Linked Zn(II)/Cd(II) Schiff‐Base Complexes with 1,3‐Diimine Spacer Group: Syntheses, Crystal Structures, DFT, TD‐DFT and Fluorescence Studies. ChemistrySelect 2018. [DOI: 10.1002/slct.201802996] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dhrubajyoti Majumdar
- Department of ChemistryTamralipta Mahavidyalaya Tamluk- 721636 West Bengal India
- Department of Applied ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Swapan Dey
- Department of Applied ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Sreejith S. Sreekumar
- Department of Applied ChemistryCochin University of Science and Technology Kochi 682022 Kerala India
| | - Sourav Das
- Department of ChemistryInstitute of Infrastructure Technology Research and Management; Near Khokhara Circle, Maninagar East, Ahmedabad- 380026 Gujarat India
| | - Dhiraj Das
- Department of Chemical SciencesIISER, Mohali Manauli, PO 140306 India
| | - Ramesh K. Metre
- Department of ChemistryIndian Institute of Technology Jodhpur Rajasthan 342037 India
| | - Kalipada Bankura
- Department of ChemistryTamralipta Mahavidyalaya Tamluk- 721636 West Bengal India
| | - Dipankar Mishra
- Department of ChemistryTamralipta Mahavidyalaya Tamluk- 721636 West Bengal India
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Cox JW, Foster GM, Jarjour A, von Wenckstern H, Grundmann M, Brillson LJ. Defect Manipulation To Control ZnO Micro-/Nanowire-Metal Contacts. Nano Lett 2018; 18:6974-6980. [PMID: 30384614 DOI: 10.1021/acs.nanolett.8b02892] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface states that induce depletion regions are commonly believed to control the transport of charged carriers through semiconductor nanowires. However, direct, localized optical, and electrical measurements of ZnO nanowires show that native point defects inside the nanowire bulk and created at metal-semiconductor interfaces are electrically active and play a dominant role electronically, altering the semiconductor doping, the carrier density along the wire length, and the injection of charge into the wire. We used depth-resolved cathodoluminescence spectroscopy to measure the densities of multiple point defects inside ZnO nanowires, substitutional Cu on Zn sites, zinc vacancy, and oxygen vacancy defects, showing that their densities varied strongly both radially and lengthwise for tapered wires. These defect profiles and their variation with wire diameter produce trap-assisted tunneling and acceptor trapping of free carriers, the balance of which determines the low contact resistivity (2.6 × 10-3 Ω·cm-2) ohmic, Schottky (Φ ≥ 0.35 eV) or blocking nature of Pt contacts to a single nano/microwire. We show how these defects can now be manipulated by ion beam methods and nanowire design, opening new avenues to control nanowire charge injection and transport.
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Affiliation(s)
- Jonathan W Cox
- Department of Electrical and Computer Engineering , The Ohio State University , 205 Dreese Lab, 2015 Neil Avenue , Columbus , Ohio 43210 , United States
| | - Geoffrey M Foster
- Department of Physics , Ohio State University , 191 W. Woodruff Avenue , Columbus , Ohio 43210 , United States
| | - Alexander Jarjour
- Department of Physics , Cornell University , 171 Clark Hall , Ithaca , New York 14850 , United States
| | - Holger von Wenckstern
- Institut für Experimentelle Physik II , Universität Leipzig , Linnéstrasse 5 , 04103 Leipzig , Germany
| | - Marius Grundmann
- Institut für Experimentelle Physik II , Universität Leipzig , Linnéstrasse 5 , 04103 Leipzig , Germany
| | - Leonard J Brillson
- Department of Electrical and Computer Engineering , The Ohio State University , 205 Dreese Lab, 2015 Neil Avenue , Columbus , Ohio 43210 , United States
- Department of Physics , Ohio State University , 191 W. Woodruff Avenue , Columbus , Ohio 43210 , United States
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Lin YH, Lin WS, Wong JC, Hsu WC, Peng YS, Chen CL. Bottom-up assembly of silicon nanowire conductometric sensors for the detection of apolipoprotein A1, a biomarker for bladder cancer. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2288-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Wang Y, Chen Y, Zhao W, Ding L, Wen L, Li H, Jiang F, Su J, Li L, Liu N, Gao Y. A Self-Powered Fast-Response Ultraviolet Detector of p-n Homojunction Assembled from Two ZnO-Based Nanowires. Nanomicro Lett 2017; 9:11. [PMID: 30460308 PMCID: PMC6223770 DOI: 10.1007/s40820-016-0112-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 09/10/2016] [Indexed: 05/04/2023]
Abstract
ABSTRACT Nowadays, fabrication of micro/nano-scale electronic devices with bottom-up approach is paid much research attention. Here, we provide a novel micro/nano-assembling method, which is accurate and efficient, especially suitable for the fabrication of micro/nano-scale electronic devices. Using this method, a self-powered ZnO/Sb-doped ZnO nanowire p-n homojunction ultraviolet detector (UVD) was fabricated, and the detailed photoelectric properties were tested. At a reverse bias of -0.1 V under UV light illumination, the photoresponse sensitivity of the UVD was 26.5 and the rise/decay time of the UVD was as short as 30 ms. The micro/nano-assembling method has wide potential applications in the fabrication of specific micro/nano-scale electronic devices. GRAPHICAL ABSTRACT A self-powered ZnO/Sb-doped ZnO nanowire p-n homojunction ultraviolet detector (UVD) was fabricated by using a novel micro/nano-assembling method with bottom-up approach. At reverse bias of -0.1 V under UV light illumination, the photoresponse sensitivity of the UVD was 26.5, and the rise time and decay time of the UVD were as short as 30 ms.
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Affiliation(s)
- Yumei Wang
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
- Department of Mathematics and Physics, Zhengzhou University of Aeronautics, Wenyuan Road West 15, Zhengzhou, 450046 People’s Republic of China
| | - Ying Chen
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Wanqiu Zhao
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Longwei Ding
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Li Wen
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Haixia Li
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Fan Jiang
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Jun Su
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Luying Li
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Nishuang Liu
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
| | - Yihua Gao
- Center for Nanoscale Characterization and Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074 People’s Republic of China
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Wang X, Chen K, Zhang Y, Wan J, Warren OL, Oh J, Li J, Ma E, Shan Z. Growth Conditions Control the Elastic and Electrical Properties of ZnO Nanowires. Nano Lett 2015; 15:7886-92. [PMID: 26510098 DOI: 10.1021/acs.nanolett.5b02852] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Great efforts have been made to synthesize ZnO nanowires (NWs) as building blocks for a broad range of applications because of their unique mechanical and mechanoelectrical properties. However, little attention has been paid to the correlation between the NWs synthesis condition and these properties. Here we demonstrate that by slightly adjusting the NW growth conditions, the cross-sectional shape of the NWs can be tuned from hexagonal to circular. Room temperature photoluminescence spectra suggested that NWs with cylindrical geometry have a higher density of point defects. In situ transmission electron microscopy (TEM) uniaxial tensile-electrical coupling tests revealed that for similar diameter, the Young's modulus and electrical resistivity of hexagonal NWs is always larger than that of cylindrical NWs, whereas the piezoresistive coefficient of cylindrical NWs is generally higher. With decreasing diameter, the Young's modulus and the resistivity of NWs increase, whereas their piezoresistive coefficient decreases, regardless of the sample geometry. Our findings shed new light on understanding and advancing the performance of ZnO-NW-based devices through optimizing the synthesis conditions of the NWs.
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Affiliation(s)
- Xiaoguang Wang
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Kai Chen
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Yongqiang Zhang
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Jingchun Wan
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Oden L Warren
- Hysitron Incorporated, 9625 West 76th St, Minneapolis, Minnesota 55344, United States
| | - Jason Oh
- Hysitron Incorporated, 9625 West 76th St, Minneapolis, Minnesota 55344, United States
| | - Ju Li
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
- Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Evan Ma
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
- Department of Materials Science and Engineering, The Johns Hopkins University , Baltimore, Maryland 21218, United States
| | - Zhiwei Shan
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, P. R. China
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Choi DS, Singh M, Song S, Chang JY, Kang Y, Hahm JI. Scattering Intensity and Directionality Probed Along Individual Zinc Oxide Nanorods with Precisely Controlled Light Polarization and Nanorod Orientation. Photonics 2015; 2:684-701. [PMID: 26568952 DOI: 10.3390/photonics2020684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
We elucidated the light-matter interaction of individual ZnO NRs with a monochromatic beam of linearly polarized light that scatters elastically from the ZnO NRs by performing forward scattering and back-aperture imaging in a dark-field setting. We precisely controlled the electric field vector of the incident light and the NR orientation within the plane of light interaction during both modes of measurement, and spatially resolved the scattering response from different interaction points along the NR long axis. We then discerned, for the first time, the effects of light polarization, analyzer angle, and NR orientation on the intensity and directionality of the optical responses both qualitatively and quantitatively along the length of the single ZnO NRs. We identified distinctive scattering profiles from individual ZnO NRs subject to incident light polarization with controlled NR orientation from the forward dark-field scattering and back-aperture imaging modes. The fundamental light interaction behavior of ZnO NRs is likely to govern their functional outcomes in photonics, optoelectronics, and sensor devices. Hence, our efforts provided much needed insight into unique optical responses from individual 1D ZnO nanomaterials, which could be highly beneficial in developing next-generation optoelectronic systems and optical biodetectors with improved device efficiency and sensitivity.
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Hsu CL, Chang SJ. Doped ZnO 1D nanostructures: synthesis, properties, and photodetector application. Small 2014; 10:4562-85. [PMID: 25319960 DOI: 10.1002/smll.201401580] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/01/2014] [Indexed: 05/14/2023]
Abstract
In the past decades, the doping of ZnO one-dimensional nanostructures has attracted a great deal of attention due to the variety of possible morphologies, large surface-to-volume ratios, simple and low cost processing, and excellent physical properties for fabricating high-performance electronic, magnetic, and optoelectronic devices. This article mainly concentrates on recent advances regarding the doping of ZnO one-dimensional nanostructures, including a brief overview of the vapor phase transport method and hydrothermal method, as well as the fabrication process for photodetectors. The dopant elements include B, Al, Ga, In, N, P, As, Sb, Ag, Cu, Ti, Na, K, Li, La, C, F, Cl, H, Mg, Mn, S, and Sn. The various dopants which act as acceptors or donors to realize either p-type or n-type are discussed. Doping to alter optical properties is also considered. Lastly, the perspectives and future research outlook of doped ZnO nanostructures are summarized.
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Affiliation(s)
- Cheng-Liang Hsu
- Departments of Electrical Engineering, National University of Tainan, Tainan, 700, Taiwan
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Roy S, Bhaumik PK, Harms K, Chattopadhyay S. Variation in molecular and crystalline architectures of di- and poly-nuclear cadmium(II) complexes on changing the denticity of the blocking ligands. Polyhedron 2014; 75:57-63. [DOI: 10.1016/j.poly.2014.02.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
To better understand the effect of functional molecule types to the surface properties of ZnO nanorods, three organic molecules – ethylenediamine, sodium citrate and butanethiol were used for the surface modification of ZnO nanorods.
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Affiliation(s)
- Lei Wang
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
| | - Lu Feng
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
| | - Jifeng Liu
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
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Yang Y, Han S, Zhou G, Zhang L, Li X, Zou C, Huang S. Ascorbic-acid-assisted growth of high quality M@ZnO: a growth mechanism and kinetics study. Nanoscale 2013; 5:11808-11819. [PMID: 24122007 DOI: 10.1039/c3nr03934j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a general route for synthesizing M@ZnO nanoparticles (NPs) by using ascorbic acid (AA) to induce deposition of ZnO on various shaped and structured cationic-surfactant-capped NP surfaces (noble, magnetic, semiconductor, rod-like, spherical, cubic, dendrite, alloy, core@shell). The results show that the complexing (AA and Zn(2+)) and cooperative effects (AA and CTAB) play important roles in the formation of polycrystalline ZnO shells. Besides, the growth kinetics of M@ZnO was systematically studied. It was found that the slow growth rate favors the successful formation of uniform core@ZnO NPs with relatively loose shells. An appropriate growth rate allows achieving high quality M@ZnO NPs with dense shells. However, very fast growth causes significant additional nucleation and the formation of pure ZnO NPs. This general method is suitable for preparing M@ZnO using seed NPs prepared in both water and organic phases. It might be an alternative route for functionalizing NPs for bioapplications (ZnO is biocompatible), modulating material properties as designed, or synthesizing template materials for building other nanostructures.
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Affiliation(s)
- Yun Yang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
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Shen X, Mu D, Chen S, Wu B, Wu F. Enhanced electrochemical performance of ZnO-loaded/porous carbon composite as anode materials for lithium ion batteries. ACS Appl Mater Interfaces 2013; 5:3118-3125. [PMID: 23532681 DOI: 10.1021/am400020n] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
ZnO-loaded/porous carbon (PC) composites with different ZnO loading amounts are first synthesized via a facile solvothermal method and evaluated for anode materials of lithium ion batteries. The architecture and the electrochemical performance of the as-prepared composites are investigated through structure characterization and galvanostatic charge/discharge test. The ZnO-loaded/PC composites possess a rich porous structure with well-distributed ZnO particles (size range: 30-100 nm) in the PC host. The one with 54 wt % ZnO loading contents exhibits a high reversible capacity of 653.7 mA h g(-1) after 100 cycles. In particular, a capacity of 496.8 mA h g(-1) can be reversibly obtained when cycled at 1000 mA g(-1). The superior lithium storage properties of the composite may be attributed to its nanoporous structure together with an interconnected network. The modified interfacial reaction kinetics of the composite promotes the intercalation/deintercalation of lithium ions and the charge transfer on the electrode. As a result, the enhanced capacity of the composite electrode is achieved, as well as its high rate capability.
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Affiliation(s)
- Xueyang Shen
- Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
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