Hierarchical nanosheets-anchored-on-microsheets FeCo2S4 arrays as binder-free electrode for high-performance hybrid supercapacitor
Hierarchical nanosheets-anchored-on-microsheets FeCo2S4 arrays as binder-free electrode for high-performance hybrid supercapacitor
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分层纳米片锚定在微米片上的 FeCo2S4 阵列作为高性能混合超级电容器的无粘合剂电极
DOI:
10.1016/j.jallcom.2019.07.055
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发表时间:
2019-10
影响因子:
6.2
通讯作者:
Xu Zhikun
中科院分区:
文献类型:
--
作者:
Xiu Ning;Zhao Kaixin;Lin Shuangyan;Xu Zhikun
The binary transition metal sulfides are highly desirable electrode materials for high-performance supercapacitors, thanks for their excellent electrochemical activity and electrical conductivity. Herein, the hierarchical FeCo2S4arrays are designed and constructed on Ni foam, which consists of microsheets anchored nanosheets. The FeCo2S4hierarchical structure provides high conductivity and abundant electroactive sites as well as facial and short ion transport paths. Therefore, the FeCo2S4electrode achieves an excellent specific capacitance of 2488.50 F g−1(7.66 F cm−2) at 5 mA cm−2, and a high level of cycle stability of 95.67% retention after 5000 cycles. The FeCo2S4//activated carbon (AC) device delivers the maximal energy density of 44.89 W h kg−1and the maximal power density of 4015.56 W kg−1. The impressive electrochemical properties of hierarchical FeCo2S4arrays make it a promising high-performance electrode for hybrid supercapacitors.
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