Amorphous cobalt hydroxysulfide nanosheets with regulated electronic structure for high-performance electrochemical energy storage

作     者：Kun Xiang Xuewan Wang Wen You Zhikun Peng Jing-Li Luo Xian-Zhu Fu 项坤;王学万;游雯;彭智昆;骆静利;符显珠

作者机构：College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Ceramic Research Institute of Light Industry of ChinaJingdezhen 333000China Henan Institutes of Advanced TechnologyZhengzhou UniversityZhengzhou 450003China Department of Chemical and Materials EngineeringUniversity of AlbertaAlberta T6G1H9Canada 

基　　金：surpported by the National Natural Science Foundation of China(21902108,21975163 and 51902204) China Postdoctoral Science Foundation(2019M663035) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第11期

页      码：2303-2313页

摘      要：Pseudocapacitors with high power density,longterm durability,as well as reliable safety,play a key role in energy conversion and *** electrode materials combing the features of high specific capacitance,excellent rate performance,and outstanding mechanical stability is still a ***,a facile partial sulfurization strategy has been developed to modulate the electronic structure and crystalline texture of cobalt hydroxide nanosheets(denoted as Co(OH)2)at room *** resultant cobalt hydroxysulfide nanosheet(denoted as Co SOH)electrode with abundant low-valence cobalt species and amorphous structure,exhibits a high specific capacitance of 2110 F g^-1at1 A g^-1with an excellent capability retention rate of 92.1%at10 A g^-1,which is much larger than that of Co(OH)2 precursor(916 F g^-1at 1 A g^-1 and 80%retention at 10 A g^-1).Furthermore,the fabricated asymmetric supercapacitor device constructed with Co SOH and active carbon displays a considerable high energy density of 44.9 W h kg^-1at a power density of 400 W kg^-1,and exceptional stability after 8000cycles.

主 题 词：hydroxysulfide amorphous supercapacitor electronic structure nanosheet 

学科分类：080801[080801] 0808[工学-自动化类] 07[理学] 070205[070205] 08[工学] 080501[080501] 0805[工学-能源动力学] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1007/s40843-020-1362-1

馆 藏 号：203980183...