超级电容器
材料科学
硫化钴
电极
电化学
化学工程
硫化镍
镍
无定形固体
纳米线
钴
氧化物
电容
纳米技术
冶金
化学
结晶学
物理化学
工程类
作者
Vinayak G. Parale,Taehee Kim,Amar M. Patil,Varsha D. Phadtare,Haryeong Choi,Rushikesh P. Dhavale,Younghun Kim,Seong Chan Jun,Hyung‐Ho Park
摘要
Core-shell nanostructured three-dimensional binderless electrode porosity makes them ideal candidates for electrochemical energy storage applications. This article proposes NiCo2S4@MnOx electrodes fabricated using a facile hydrothermal approach and subsequently annealed at 120°C for 12 hours. The resultant [email protected] structure allows rapid ion and electron transport. Coating with pseudocapacitive MnOx on NiCo2S4 nanoarrays improves overall capacitance, and the amorphous MnOx nanosheets promote electrode cycling stability. The proposed NiCo2S4@MnOx electrode achieved excellent specific capacitance of 1640 F·g−1 at 5 mA·cm−2 and cyclic stability ≈ 90%; and the subsequently fabricated asymmetric electrochemical supercapacitor achieved specific capacitance ~96.91 F·g−1, and specific energy (SE) 26.38 Wh·kg−1 at specific power (SP) 466.66 W·kg−1, with impressive electrochemical stability ≈ 80% over 5000 charge/discharge cycles.
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