writer：Shiqing Sun, Guohua Jiang,* Yongkun Liu, Bo Yu, Uwamahoro Evariste
keywords：nanocomposites; electrical properties; energy storage; supercapacitor
source：期刊
specific source：Journal of Energy Storage, 2018, 18, 256-258.
Issue time：2018年

The negative electrode materials are crucial to improve electrochemical performance in asymmetric supercapacitors (ASCs) as well as positive electrode. Herein, the α-MnO2/Ag/RGO hybrid films were prepared by a facile and rapid natural deposition technique and exhibit good electrochemical performance with specific capacitance of 804.6 F g-1 at 1 A g-1. The ASCs were further fabricated using NiCoS2/CNFs and α-MnO2/Ag/RGO film as positive and negative electrodes. The operation potential window of ASCs was 0~1.6 V. The fabricated ASCs exhibited the maximum energy density of 44.2 Wh kg-1 at a power density of 288.2 W kg-1. The as-fabricated ASCs has a great potential for application in portable and wearable energy-storage systems.