Supercapacitor electrode based on few-layer h-BNNSs/rGO composite for wide-temperature-range operation with robust stable cycling performance
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第2期
论文作者：Tao Yang Hui-juan Liu Fan Bai En-hui Wang Jun-hong Chen Kuo-Chih Chou Xin-mei Hou
文章页码：220 - 231
摘 要：Currently, developing supercapacitors with robust cycle stability and suitability for wide-temperature-range operations is still a huge challenge. In the present work, few-layer hexagonal boron nitride nanosheets（h-BNNSs） with a thickness of 2-4 atomic layers were fabricated via vacuum freeze-drying and nitridation. Then, the h-BNNSs/reduced graphene oxide（rGO） composite were further prepared using a hydrothermal method. Due to the combination of two two-dimensional（2 D） van der Waals-bonded materials, the as-prepared h-BNNSs/rGO electrode exhibited robustness to wide-temperature-range operations from-10 to 50℃. When the electrodes worked in a neutral aqueous electrolyte（1 M Na2 SO4）, they showed a great stable cycling performance with almost 107% reservation of the initial capacitance at 0℃ and 111% at 50℃ for5000 charge-discharge cycles.
Tao Yang1，Hui-juan Liu1，Fan Bai1，En-hui Wang1，Jun-hong Chen2，Kuo-Chih Chou1，Xin-mei Hou1
1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing2. School of Materials Science and Engineering, University of Science and Technology Beijing
摘 要：Currently, developing supercapacitors with robust cycle stability and suitability for wide-temperature-range operations is still a huge challenge. In the present work, few-layer hexagonal boron nitride nanosheets（h-BNNSs） with a thickness of 2-4 atomic layers were fabricated via vacuum freeze-drying and nitridation. Then, the h-BNNSs/reduced graphene oxide（rGO） composite were further prepared using a hydrothermal method. Due to the combination of two two-dimensional（2 D） van der Waals-bonded materials, the as-prepared h-BNNSs/rGO electrode exhibited robustness to wide-temperature-range operations from-10 to 50℃. When the electrodes worked in a neutral aqueous electrolyte（1 M Na2 SO4）, they showed a great stable cycling performance with almost 107% reservation of the initial capacitance at 0℃ and 111% at 50℃ for5000 charge-discharge cycles.
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