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Li M, Han B, Li S, Zhang Q, Zhang E, Gong L, Qi D, Wang K, Jiang J. Constructing 2D Phthalocyanine Covalent Organic Framework with Enhanced Stability and Conductivity via Interlayer Hydrogen Bonding as Electrocatalyst for CO 2 Reduction. Small 2024:e2310147. [PMID: 38377273 DOI: 10.1002/smll.202310147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/22/2024] [Indexed: 02/22/2024]
Abstract
Fabricating COFs-based electrocatalysts with high stability and conductivity still remains a great challenge. Herein, 2D polyimide-linked phthalocyanine COF (denoted as NiPc-OH-COF) is constructed via solvothermal reaction between tetraanhydrides of 2,3,9,10,16,17,23,24-octacarboxyphthalocyaninato nickel(II) and 2,5-diamino-1,4-benzenediol (DB) with other two analogous 2D COFs (denoted as NiPc-OMe-COF and NiPc-H-COF) synthesized for reference. In comparison with NiPc-OMe-COF and NiPc-H-COF, NiPc-OH-COF exhibits enhanced stability, particularly in strong NaOH solvent and high conductivity of 1.5 × 10-3 S m-1 due to the incorporation of additional strong interlayer hydrogen bonding interaction between the O-H of DB and the hydroxy "O" atom of DB in adjacent layers. This in turn endows the NiPc-OH-COF electrode with ultrahigh CO2 -to-CO faradaic efficiency (almost 100%) in a wide potential range from -0.7 to -1.1 V versus reversible hydrogen electrode (RHE), a large partial CO current density of -39.2 mA cm-2 at -1.1 V versus RHE, and high turnover number as well as turnover frequency, amounting to 45 000 and 0.76 S-1 at -0.80 V versus RHE during 12 h lasting measurement.
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Affiliation(s)
- Mingrun Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Bin Han
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Senzhi Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qi Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Enhui Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Lei Gong
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Dongdong Qi
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kang Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianzhuang Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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Mihali V, Honciuc A. Semiconductor-Insulator (Nano-)Couples with Tunable Properties Obtained from Asymmetric Modification of Janus Nanoparticles. ACS Appl Mater Interfaces 2021; 13:49206-49214. [PMID: 34609834 DOI: 10.1021/acsami.1c14884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Coupling a semiconductor with an electrical insulator in a single amphiphilic nanoparticle could open new pathways for manufacturing and assembling organic electronic devices. Here, a poly(3,4-ethylenedioxythiophene)/polyaniline (PEDOT/PANI) bilayer is confined on the surface of one lobe of snowman-type Janus nanoparticles (JNPs), such that one lobe is semiconducting and the other is electrically insulating. The PEDOT/PANI bilayer is constructed in two synthesis steps, by asymmetric modification of the JNPs with PANI followed by PEDOT. The addition of the PEDOT layer onto the PANI-modified JNPs leads to an enhancement in the conductivity of up to 2 orders of magnitude. Further, we demonstrate that JNPs are very versatile supports for semiconducting polymers because by tuning their size and geometry the overall conductivity of the JNP powders can be modulated within several orders of magnitude.
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Affiliation(s)
- Voichita Mihali
- Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Waedenswil, Switzerland
| | - Andrei Honciuc
- "Petru Poni" Institute of Macromolecular Chemistry, Electroactive Polymers and Plasmochemistry Laboratory, Aleea Gr. Ghica Voda 41A, Iasi 700487, Romania
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Lee SJ, Li J, Lee SI, Moon CB, Kim WY, Cao J, Jhun CG. Effects of MEH-PPV Molecular Ordering in the Emitting Layer on the Luminescence Efficiency of Organic Light-Emitting Diodes. Molecules 2021; 26:2512. [PMID: 33923106 DOI: 10.3390/molecules26092512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 11/25/2022] Open
Abstract
We investigated the effects of molecular ordering on the electro-optical characteristics of organic light-emitting diodes (OLEDs) with an emission layer (EML) of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV). The EML was fabricated by a solution process which can make molecules ordered. The performance of the OLED devices with the molecular ordering method was compared to that obtained through fabrication by a conventional spin coating method. The turn-on voltage and the luminance of the conventional OLEDs were 5 V and 34.75 cd/m2, whereas those of the proposed OLEDs were 4.5 V and 120.3 cd/m2, respectively. The underlying mechanism of the higher efficiency with ordered molecules was observed by analyzing the properties of the EML layer using AFM, SE, XRD, and an LCR meter. We confirmed that the electrical properties of the organic thin film can be improved by controlling the molecular ordering of the EML, which plays an important role in the electrical characteristics of the OLED.
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Yin B, Liu Z, Wang Y, Ji X, Huan Y, Dong D, Hu X, Wei T. Revealing the Intrinsic Origin for Performance-Enhancing V 2O 5 Electrode Materials. ACS Appl Mater Interfaces 2020; 12:45961-45967. [PMID: 32965097 DOI: 10.1021/acsami.0c11093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Revealing the intrinsic origin is critical for developing performance-enhancing V2O5 battery-type electrode materials. In this work, ultralong single-crystal V2O5 wires (W-V2O5) and V2O5 plate particles (P-V2O5) with similar physicochemical properties were compared to investigate the possible stimulative factors for pseudocapacitive enhancement. Our results indicate that besides the most-discussed specific surface area (or nanostructure), the enhanced electronic conductivity, the controllable interlamellar spacing distance, and the ion-transporting route as intrinsic origin also greatly affect their pseudocapacitive enhancement. First, the ultralong single-crystal wire structure can apparently enhance the electrons transport; second, the unique [001] facet orientation along the wire direction enlarges the interlamellar spacing distance and shortens the Li+ inserting route, thus facilitating the redox reactions by providing fast channels for charge carrier intercalation. Thus W-V2O5 showed much higher capacitance, better rate, and cycling capability than those of P-V2O5. This new insight presented here provides guidance for the design of V2O5 electrode materials and opens new opportunities in the development of high-performance battery-type electrode materials.
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Affiliation(s)
- Baoyi Yin
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Zhen Liu
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Yanfeng Wang
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Xiaohui Ji
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Yu Huan
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Dehua Dong
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Xun Hu
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
| | - Tao Wei
- School of Materials Science and Engineering, University of Jinan, 336 Nanxinzhuang West Road, Jinan, Shandong 250022, P. R. China
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Zhou T, Xu W, Zhang N, Du Z, Zhong C, Yan W, Ju H, Chu W, Jiang H, Wu C, Xie Y. Ultrathin Cobalt Oxide Layers as Electrocatalysts for High-Performance Flexible Zn-Air Batteries. Adv Mater 2019; 31:e1807468. [PMID: 30785222 DOI: 10.1002/adma.201807468] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/16/2019] [Indexed: 05/27/2023]
Abstract
Synergistic improvements in the electrical conductivity and catalytic activity for the oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) are of paramount importance for rechargeable metal-air batteries. In this study, one-nanometer-scale ultrathin cobalt oxide (CoOx ) layers are fabricated on a conducting substrate (i.e., a metallic Co/N-doped graphene substrate) to achieve superior bifunctional activity in both the ORR and OER and ultrahigh output power for flexible Zn-air batteries. Specifically, at the atomic scale, the ultrathin CoOx layers effectively accelerate electron conduction and provide abundant active sites. X-ray absorption spectroscopy reveals that the metallic Co/N-doped graphene substrate contributes to electron transfer toward the ultrathin CoOx layer, which is beneficial for the electrocatalytic process. The as-obtained electrocatalyst exhibits ultrahigh electrochemical activity with a positive half-wave potential of 0.896 V for ORR and a low overpotential of 370 mV at 10 mA cm-2 for OER. The flexible Zn-air battery built with this catalyst exhibits an ultrahigh specific power of 300 W gcat -1 , which is essential for portable devices. This work provides a new design pathway for electrocatalysts for high-performance rechargeable metal-air battery systems.
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Affiliation(s)
- Tianpei Zhou
- Hefei National Laboratory for Physical Science at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Centre (CAS) and CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Wanfei Xu
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Nan Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Zhiyi Du
- Hefei National Laboratory for Physical Science at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Centre (CAS) and CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Chengan Zhong
- Hefei National Laboratory for Physical Science at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Centre (CAS) and CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Huanxin Ju
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Hong Jiang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Science at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Centre (CAS) and CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Science at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Centre (CAS) and CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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Kwon YT, Kim YS, Lee Y, Kwon S, Lim M, Song Y, Choa YH, Yeo WH. Ultrahigh Conductivity and Superior Interfacial Adhesion of a Nanostructured, Photonic-Sintered Copper Membrane for Printed Flexible Hybrid Electronics. ACS Appl Mater Interfaces 2018; 10:44071-44079. [PMID: 30452228 DOI: 10.1021/acsami.8b17164] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Inkjet-printed electronics using metal particles typically lack electrical conductivity and interfacial adhesion with an underlying substrate. To address the inherent issues of printed materials, this Research Article introduces advanced materials and processing methodologies. Enhanced adhesion of the inkjet-printed copper (Cu) on a flexible polyimide film is achieved by using a new surface modification technique, a nanostructured self-assembled monolayer (SAM) of (3-mercaptopropyl)trimethoxysilane. A standardized adhesion test reveals the superior adhesion strength (1192.27 N/m) of printed Cu on the polymer film, while maintaining extreme mechanical flexibility proven by 100 000 bending cycles. In addition to the increased adhesion, the nanostructured SAM treatment on printed Cu prevents formation of native oxide layers. The combination of the newly synthesized Cu ink and associated sintering technique with an intense pulsed ultraviolet and visible light absorption enables ultrahigh conductivity of printed Cu (2.3 × 10-6 Ω·cm), which is the highest electrical conductivity reported to date. The comprehensive materials engineering technologies offer highly reliable printing of Cu patterns for immediate use in wearable flexible hybrid electronics. In vivo demonstration of printed, skin-conformal Cu electrodes indicates a very low skin-electrode impedance (<50 kΩ) without a conductive gel and successfully measures three types of biopotentials, including electrocardiograms, electromyograms, and electrooculograms.
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Affiliation(s)
- Young-Tae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
- Department of Materials Science and Chemical Engineering , Hanyang University , Ansan 15588 , South Korea
| | - Yun-Soung Kim
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Yongkuk Lee
- Department of Biomedical Engineering , Wichita State University , Wichita , Kansas 67260 , United States
| | - Shinjae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Minseob Lim
- Department of Materials Science and Chemical Engineering , Hanyang University , Ansan 15588 , South Korea
| | - Yoseb Song
- Department of Materials Science and Chemical Engineering , Hanyang University , Ansan 15588 , South Korea
| | - Yong-Ho Choa
- Department of Materials Science and Chemical Engineering , Hanyang University , Ansan 15588 , South Korea
| | - Woon-Hong Yeo
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
- Center for Flexible and Wearable Electronics Advanced Research, Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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Abstract
A drastic change in the conductivity of strained BiFeO3 (BFO) films is observed after illuminating them with above-band gap light. This has been termed as persistent photoconductivity. The enhanced conductivity decays exponentially with time. A trapping character of the sub-band levels and their subsequent gradual emptying is proposed as a possible mechanism.
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Affiliation(s)
- Akash Bhatnagar
- Max Planck Institute of Microstructure Physics , Weinberg 2, 06120 Halle, Germany
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