纳米片
超级电容器
材料科学
电极
镍
电容
功率密度
热液循环
纳米技术
化学工程
碳纤维
水热合成
复合材料
冶金
化学
复合数
功率(物理)
物理化学
工程类
物理
量子力学
作者
Sanming Chen,Guang Yang,Yi Jia,Huajun Zheng
标识
DOI:10.1002/celc.201600316
摘要
Abstract Well‐aligned CoWO 4 nanosheet arrays grown on nickel foam substrates have been fabricated by using a facile hydrothermal process. The interconnected CoWO 4 nanosheets with abundant open spaces are uniformly deposited on the skeleton of the nickel foam. When investigated as binder‐free electrodes for supercapacitors, the CoWO 4 nanosheet arrays exhibit a specific capacitance of 1127.6 F g −1 at 1 A g −1 and remarkable cycle performance. Moreover, an asymmetric supercapacitor (ASC) is assembled by using CoWO 4 nanosheets and activated carbon as the positive electrode and negative electrode, respectively. The ASC device delivers a maximum energy density of 48 Wh kg −1 at a power density of 365 W kg −1 . The results demonstrate that CoWO 4 nanosheet arrays could be potential electrode materials for energy‐storage systems.
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