文献类型：期刊文献

英文题名：Ni-Co sulfide nanoboxes with tunable compositions for high-performance electrochemical pseudocapacitors

作者：Xu, Yangyang[1];Gao, Xuehui[2];Chu, Wenya[1];Li, Quanguo[1];Li, Tianjun[3];Liang, Chengdu[1];Lin, Zhan[1]

机构：[1]Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China;[2]Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China;[3]Shaoxing Univ, Coll Math Phys & Informat, Shaoxing 312000, Zhejiang, Peoples R China

年份：2016

卷号：4

期号：26

起止页码：10248

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：SCI-EXPANDED(收录号：WOS:000378742100025)、、EI(收录号：20162702566985)、Scopus(收录号：2-s2.0-84976576485)、WOS

基金：Z. Lin acknowledges the funding support from the Chinese government under the "Thousand Youth Talents Program" and from Zhejiang Province Science Fund for Distinguished Young Scholars (No. LR16B060001). T. Li acknowledges the funding support from Zhejiang Provincial Natural Science Foundation of China (No. LQ16A020003), the National Natural Foundation of China (No. 11547120), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China, and the China Postdoctoral Science Foundation (No. 2015M580509).

语种：英文

外文关键词：Binary alloys - Capacitance - Cobalt compounds - Electrochemical electrodes - Nickel compounds - Supercapacitor - Temperature

外文摘要：Ni-Co sulfides are considered as promising electrode materials for electrochemical pseudocapacitors because of their rich redox chemistry and great structural flexibility with low cost. However, traditional Ni-Co sulfides still suffer from poor electrochemical performance due to relatively low electronic conductivity and structural instability. Herein, we present facile syntheses of hollow Ni-Co sulfide nanoboxes with tunable compositions, i.e., NiCo2S4 and Ni2CoS4, by using a low-temperature wet-chemical method. The resultant Ni-Co sulfides demonstrate high specific capacitances with enhanced cycling stability and rate capability. The NiCo2S4 electrode exhibits a capacitance of 1588 F g(-1) at 2 A g(-1) and a capacitance retention of 88.2% at 5 A g(-1) after 4000 cycles, while the Ni2CoS4 electrode exhibits a capacitance of 1200 F g(-1) at 2 A g(-1) and a capacitance retention of 90.5% at 5 A g(-1) after 4000 cycles. All the experimental results illustrate nanostructured Ni-Co sulfides to be promising electrode materials for high-performance supercapacitors.