超级电容器
材料科学
电极
功率密度
基质(水族馆)
导电体
复合数
芯(光纤)
壳体(结构)
纳米技术
电容
电流密度
热液循环
化学工程
光电子学
复合材料
功率(物理)
化学
海洋学
物理
地质学
工程类
物理化学
量子力学
作者
Yidong Miao,Xuping Zhang,Jiang Zhan,Yanwei Sui,Jiqiu Qi,Fuxiang Wei,Qingkun Meng,Yezeng He,Yaojian Ren,Zhenzhen Zhan,Zhi Sun
标识
DOI:10.1002/admi.201901618
摘要
Constructing hierarchical core-shell configuration from well-known metal sulfides is one way to further tune and utilize unique species. Herein, a novel core-shell structure is developed based on CoS deposited on NiS nanosheets, which involves hydrothermal and electrodeposition method. The micromorphology of the composite electrode can be optimized by adjusting the cycles of electrodeposition. Taking advantages of the highly conductive, open framework of the core-shell nanolayer, the [email protected] electrode shows a specific capacitance of 1210 F g−1 at a current density of 1 A g−1 (retaining 82% from 1 to 10 A g−1, while NiS substrate is only 39%). The specific capacitance retention rate is 80.94% at 10 A g−1 after 2000 cycles (NiS substrate is 59.6%). Moreover, [email protected]//AC asymmetric supercapacitor device delivers an energy density of 24.1 Wh kg−1 at a power density of 752.15 W kg−1 and remarkable stability (over 80% retention after 5000 cycles). This work may prompt the exploration of the synthesis of inexpensive compounds incorporating highly reactive components for supercapacitors.
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