Controlled synthesis of NiSe-Ni0.85Se nanocomposites for high-performance hybrid supercapacitors
Controlled synthesis of NiSe-Ni0.85Se nanocomposites for high-performance hybrid supercapacitors
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用于高性能混合超级电容器的NiSe-Ni0.85Se纳米复合材料的受控合成
DOI：
10.1016/j.jelechem.2020.114795
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发表时间：
2021-01-01
影响因子：
4.5
通讯作者：
Wang, Xinchang
中科院分区：
文献类型：
--
作者：
Bai, Yucheng;Shen, Weixia;Wang, Xinchang
Constructing nanostructured multiphase composite is an effective way for optimizing the performance of electrode materials. Here we report our findings in design and fabrication of a high-performance electrode material composed of two-phase nickel selenide (NiSe-Ni0.85Se) nanoparticles, which exhibits a high specific capacity of 669 C g?1 at 1 A g?1 and 460 C g?1 at 20 A g?1, indicating its good rate capability (-69%). Moreover, a hybrid supercapacitor composed of NiSe-Ni0.85Se positive electrode and reduced graphene oxide (rGO) negative electrode delivers a specific capacitance of 101 F g?1, high energy of 41 Wh kg?1 and good cycling stability with -80% capacity retention after 5000 cycles at 10 A g?1. These findings provide an important insight into rational design of nanostructured multiphase nickel selenide materials for energy storage systems.
