Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance
Binary transition metal oxides (BTMOs) have been explored as promising candidates in rechargeable lithium-ion battery (LIB) anodes due to their high specific capacity and environmental benignity. Herein, 2D ultrathin NiCo<sub>2</sub>O<sub>4</sub> nanosheets vertically grown o...
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doaj-f42a34ac1b16452baaa99c4b1285439e2020-11-25T02:01:01ZengMDPI AGNanomaterials2079-49912019-09-0199133610.3390/nano9091336nano9091336Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage PerformanceYongchao Liu0Jintian Jiang1Yanyan Yuan2Qinglong Jiang3Chao Yan4School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaDepartment of Chemistry and Physics, University of Arkansas, Pine Bluff, AR 71601, USASchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaBinary transition metal oxides (BTMOs) have been explored as promising candidates in rechargeable lithium-ion battery (LIB) anodes due to their high specific capacity and environmental benignity. Herein, 2D ultrathin NiCo<sub>2</sub>O<sub>4</sub> nanosheets vertically grown on a biomass-derived carbon fiber substrate (NCO NSs/BCFs) were obtained by a facile synthetic strategy. The BCF substrate has superior flexibility and mechanical strength and thus not only offers a good support to NCO NSs/BCFs composites, but also provides high-speed paths for electron transport. Furthermore, 2D NiCo<sub>2</sub>O<sub>4</sub> nanosheets grown vertically present a large contact area between the electrode and the electrolyte, which shortens the ions/electrons transport distance. The nanosheets structure can effectively limit the volume change derived from Li<sup>+</sup> insertion and extraction, thus improving the stability of the electrode material. Therefore, the synthesized self-supporting NCO NSs/BCFs electrode displays excellent electrochemical performance, such as a large reversible capacity of 1128 mA·h·g<sup>−1</sup> after 80 cycles at a current density of 100 mA·g<sup>−1</sup> and a good rate capability of 818.5 mA·h·g<sup>−1</sup> at 1000 mA·g<sup>−1</sup>. Undoubtedly, the cheap biomass carbon source and facile synthesis strategy here described can be extended to other composite materials for high-performance energy-storage and conversion devices.https://www.mdpi.com/2079-4991/9/9/1336binary transition metal oxideNiCo<sub>2</sub>O<sub>4</sub> nanosheetsbiomass-derived carbon fibersself-supported electrode |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yongchao Liu Jintian Jiang Yanyan Yuan Qinglong Jiang Chao Yan |
spellingShingle |
Yongchao Liu Jintian Jiang Yanyan Yuan Qinglong Jiang Chao Yan Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance Nanomaterials binary transition metal oxide NiCo<sub>2</sub>O<sub>4</sub> nanosheets biomass-derived carbon fibers self-supported electrode |
author_facet |
Yongchao Liu Jintian Jiang Yanyan Yuan Qinglong Jiang Chao Yan |
author_sort |
Yongchao Liu |
title |
Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance |
title_short |
Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance |
title_full |
Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance |
title_fullStr |
Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance |
title_full_unstemmed |
Vertically Aligned NiCo<sub>2</sub>O<sub>4</sub> Nanosheet-Encapsulated Carbon Fibers as a Self-Supported Electrode for Superior Li<sup>+</sup> Storage Performance |
title_sort |
vertically aligned nico<sub>2</sub>o<sub>4</sub> nanosheet-encapsulated carbon fibers as a self-supported electrode for superior li<sup>+</sup> storage performance |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2019-09-01 |
description |
Binary transition metal oxides (BTMOs) have been explored as promising candidates in rechargeable lithium-ion battery (LIB) anodes due to their high specific capacity and environmental benignity. Herein, 2D ultrathin NiCo<sub>2</sub>O<sub>4</sub> nanosheets vertically grown on a biomass-derived carbon fiber substrate (NCO NSs/BCFs) were obtained by a facile synthetic strategy. The BCF substrate has superior flexibility and mechanical strength and thus not only offers a good support to NCO NSs/BCFs composites, but also provides high-speed paths for electron transport. Furthermore, 2D NiCo<sub>2</sub>O<sub>4</sub> nanosheets grown vertically present a large contact area between the electrode and the electrolyte, which shortens the ions/electrons transport distance. The nanosheets structure can effectively limit the volume change derived from Li<sup>+</sup> insertion and extraction, thus improving the stability of the electrode material. Therefore, the synthesized self-supporting NCO NSs/BCFs electrode displays excellent electrochemical performance, such as a large reversible capacity of 1128 mA·h·g<sup>−1</sup> after 80 cycles at a current density of 100 mA·g<sup>−1</sup> and a good rate capability of 818.5 mA·h·g<sup>−1</sup> at 1000 mA·g<sup>−1</sup>. Undoubtedly, the cheap biomass carbon source and facile synthesis strategy here described can be extended to other composite materials for high-performance energy-storage and conversion devices. |
topic |
binary transition metal oxide NiCo<sub>2</sub>O<sub>4</sub> nanosheets biomass-derived carbon fibers self-supported electrode |
url |
https://www.mdpi.com/2079-4991/9/9/1336 |
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