Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors
A lightweight, flexible, and highly efficient energy management strategy is highly desirable for flexible electronic devices to meet a rapidly growing demand. Herein, Ni–Co–S nanosheet array is successfully deposited on graphene foam (Ni–Co–S/GF) by a one‐step electrochemical method. The Ni–Co–S/GF...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/87773 http://hdl.handle.net/10220/45508 |
| _version_ | 1811692914749734912 |
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| author | Zhang, Chunyan Cai, Xiaoyi Qian, Yao Jiang, Haifeng Zhou, Lijun Li, Baosheng Lai, Linfei Shen, Zexiang Huang, Wei |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhang, Chunyan Cai, Xiaoyi Qian, Yao Jiang, Haifeng Zhou, Lijun Li, Baosheng Lai, Linfei Shen, Zexiang Huang, Wei |
| author_sort | Zhang, Chunyan |
| collection | NTU |
| description | A lightweight, flexible, and highly efficient energy management strategy is highly desirable for flexible electronic devices to meet a rapidly growing demand. Herein, Ni–Co–S nanosheet array is successfully deposited on graphene foam (Ni–Co–S/GF) by a one‐step electrochemical method. The Ni–Co–S/GF composed of Ni–Co–S nanosheet array which is vertically aligned to GF and provides a large interfacial area for redox reactions with optimum interstitials facilitates the ions diffusion. The Ni–Co–S/GF electrodes have high specific capacitance values of 2918 and 2364 F g−1 at current densities of 1 and 20 A g−1, respectively. Using such hierarchical Ni–Co–S/GF as the cathode, a flexible asymmetric supercapacitor (ASC) is further fabricated with polypyrrple(PPy)/GF as the anode. The flexible asymmetric supercapacitors have maximum operation potential window of 1.65 V, and energy densities of 79.3 and 37.7 Wh kg−1 when the power densities are 825.0 and 16100 W kg−1, respectively. It's worth nothing that the ASC cells have robust flexibility with performance well maintained when the devices were bent to different angles from 180° to 15° at a duration of 5 min. The efficient electrochemical deposition method of Ni–Co–S with a preferred orientation of nanosheet arrays is applicable for the flexible energy storage devices. |
| first_indexed | 2024-10-01T06:43:21Z |
| format | Journal Article |
| id | ntu-10356/87773 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:43:21Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/877732023-02-28T19:35:00Z Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors Zhang, Chunyan Cai, Xiaoyi Qian, Yao Jiang, Haifeng Zhou, Lijun Li, Baosheng Lai, Linfei Shen, Zexiang Huang, Wei School of Physical and Mathematical Sciences Asymmetric Supercapacitors Electrochemical Deposition A lightweight, flexible, and highly efficient energy management strategy is highly desirable for flexible electronic devices to meet a rapidly growing demand. Herein, Ni–Co–S nanosheet array is successfully deposited on graphene foam (Ni–Co–S/GF) by a one‐step electrochemical method. The Ni–Co–S/GF composed of Ni–Co–S nanosheet array which is vertically aligned to GF and provides a large interfacial area for redox reactions with optimum interstitials facilitates the ions diffusion. The Ni–Co–S/GF electrodes have high specific capacitance values of 2918 and 2364 F g−1 at current densities of 1 and 20 A g−1, respectively. Using such hierarchical Ni–Co–S/GF as the cathode, a flexible asymmetric supercapacitor (ASC) is further fabricated with polypyrrple(PPy)/GF as the anode. The flexible asymmetric supercapacitors have maximum operation potential window of 1.65 V, and energy densities of 79.3 and 37.7 Wh kg−1 when the power densities are 825.0 and 16100 W kg−1, respectively. It's worth nothing that the ASC cells have robust flexibility with performance well maintained when the devices were bent to different angles from 180° to 15° at a duration of 5 min. The efficient electrochemical deposition method of Ni–Co–S with a preferred orientation of nanosheet arrays is applicable for the flexible energy storage devices. Published version 2018-08-07T05:49:13Z 2019-12-06T16:49:12Z 2018-08-07T05:49:13Z 2019-12-06T16:49:12Z 2018 Journal Article Zhang, C., Cai, X., Qian, Y., Jiang, H., Zhou, L., Li, B., et al. (2018). Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors. Advanced Science, 5(2), 1700375-. https://hdl.handle.net/10356/87773 http://hdl.handle.net/10220/45508 10.1002/advs.201700375 en Advanced Science © 2017 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. 12 p. application/pdf |
| spellingShingle | Asymmetric Supercapacitors Electrochemical Deposition Zhang, Chunyan Cai, Xiaoyi Qian, Yao Jiang, Haifeng Zhou, Lijun Li, Baosheng Lai, Linfei Shen, Zexiang Huang, Wei Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title | Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title_full | Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title_fullStr | Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title_full_unstemmed | Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title_short | Electrochemically synthesis of nickel cobalt sulfide for high-performance flexible asymmetric supercapacitors |
| title_sort | electrochemically synthesis of nickel cobalt sulfide for high performance flexible asymmetric supercapacitors |
| topic | Asymmetric Supercapacitors Electrochemical Deposition |
| url | https://hdl.handle.net/10356/87773 http://hdl.handle.net/10220/45508 |
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