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
Xu Zhikun
中科院分区:
材料科学2区
文献类型:
--
作者:
Xiu Ning;Zhao Kaixin;Lin Shuangyan;Xu Zhikun

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二元过渡金属硫化物具有优异的电化学活性和导电性,是高性能超级电容器的理想电极材料。本文设计和构建了层次化的FeCo2S4阵列。泡沫镍由微片和纳米片组成。FeCo2S4的分级结构提供了高电导率和丰富的电活性中心以及表面和短离子传输路径。因此,FeCo2S4电极在5 mA cm−2时具有2488.50 F g−1(7.66 F cm−2)的优良比电容,5000次循环后的循环稳定性高达95.67%。FeCo2S4//活性碳(AC)器件的最大能量密度为44.89 W h kg−1,最大功率密度为4015.56 W kg−1。层次化FeCo2S4阵列令人印象深刻的电化学性能使其有望成为混合超级电容器的高性能电极。
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.
在泡沫镍上轻松制备花状 CuCo2S4 用于超级电容器
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