Formation of hollow-cubic Ni(OH)2/CuS2 nanocomposite via sacrificial template method for high performance supercapacitors

• Published in: Journal of materials science. Materials in electronics Vol. 31; no. 13; pp. 10489 - 10498
• Main Authors: Wang, Shitong, Wang, Jiemei, Ji, Xiang, Meng, Jiaxi, Sui, Yanwei, Wei, Fuxiang, Qi, Jiqiu, Meng, Qingkun, Ren, Yaojian, He, Yezeng, Zhuang, Dongdong
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-07-2020; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Electrical resistivity; Electrochemical analysis; Electrode materials; Energy storage; Flux density; Graphene; Materials Science; Nanocomposites; Nickel compounds; Optical and Electronic Materials; Supercapacitors
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-020-03597-z

Metal hydroxide serving as a promising electrode material for the supercapacitors, has attracted considerable interests in the area of energy storage. However, the low cycling stability and electrical conductivity restrict its further application. Here, a kind of hollow-cubic Ni(OH)
2
/CuS
2
with excellent electrochemical performance has been prepared via a facile one-step sacrificial template method. The obtained Ni(OH)
2
/CuS
2
shows an outstanding specific capacitance of 1174 F g
−1
at 1 A g
−1
with 73.9% retention after 2000 charge–discharge cycles. Furthermore, the assembled asymmetric supercapacitors based on hollow-cubic Ni(OH)
2
/CuS
2
nanocomposite and reduced graphene oxide (RGO) exhibits a high specific energy density of 27.8 Wh kg
−1
at the power density of 390 W kg
−1
.