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Hollow Ni0.85Se/Co0.85Se/Co(OH)2 hexagonal plates for high-performance hybrid supercapacitors
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-10-16 , DOI: 10.1039/d0se00097c
Jiaqin Yang 1, 2, 3, 4, 5 , Yuhang Fan 1, 2, 3, 4 , Wenxiu Peng 4, 6 , Baofeng Li 1, 2, 3, 4 , Xiaoran Li 1, 2, 3, 4 , Yuanning Hu 1, 2, 3, 4 , Lifan Cui 1, 2, 3, 4 , Haimeng Qiao 1, 2, 3, 4 , Lirong Xu 1, 2, 3, 4
Affiliation  

In order to improve the electrochemical performance, the combination of different battery-like electrode materials has attracted tremendous attention. Herein, a synthetic strategy has been proposed by combining Ni0.85Se, Co0.85Se and Co(OH)2 materials. With nickel–cobalt hydroxide as the precursor, hollow Ni0.85Se/Co0.85Se/Co(OH)2 hexagonal plates were successfully synthesized. When investigated as electrode materials for supercapacitors, outstanding electrochemical performance of the Ni0.85Se/Co0.85Se/Co(OH)2 electrode is achieved by taking advantage of the high specific capacitance of Ni0.85Se and Co0.85Se, preferable cycling stability of Co(OH)2 and special hollow architecture. The Ni0.85Se/Co0.85Se/Co(OH)2 electrode demonstrates a high specific capacitance of 842.7 F g−1 after 2000 cycles at the current density of 2 A g−1 and the Ni0.85Se/Co0.85Se/Co(OH)2//AC hybrid supercapacitor device shows a remarkable specific energy of 48.9 W h kg−1 at a specific power of 569.4 W kg−1.

中文翻译:

中空Ni0.85Se / Co0.85Se / Co(OH)2六角板,用于高性能混合超级电容器

为了提高电化学性能,不同的电池状电极材料的组合引起了极大的关注。这里,已经提出了通过组合Ni 0.85 Se,Co 0.85 Se和Co(OH)2材料的合成策略。以氢氧化镍钴为前体,成功合成了空心Ni 0.85 Se / Co 0.85 Se / Co(OH)2六角形板。当作为超级电容器的电极材料进行研究时,Ni 0.85 Se / Co 0.85 Se / Co(OH)2电极具有出色的电化学性能,这是通过利用Ni 0.85的高比电容实现的。Se和Co 0.85 Se,具有较好的Co(OH)2循环稳定性和特殊的空心结构。Ni 0.85 Se / Co 0.85 Se / Co(OH)2电极在2 A g -1的电流密度和Ni 0.85 Se / Co 0.85 Se / Co的电流密度下经过2000次循环后显示出842.7 F g -1的高比电容(OH)2 // AC混合超级电容器器件在569.4 W kg -1的比功率下显示出48.9 W h kg -1的显着比能量。
更新日期:2020-11-03
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