期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 12, 页码 13803-13810出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c02564
关键词
hybrid supercapacitor; bimetal sulfides; nanosheet arrays; controlled preparation; ion-exchange; battery-type electrode
资金
- National Natural Science Foundation of China [21971131, 21471086]
A controlled self-sacrifice template strategy was used to prepare a Zn-Co-S nanosheet array as electrode material for all-solid-state hybrid supercapacitors, demonstrating high specific capacitance and stability. This research provides a feasible strategy for rational preparation of bimetal sulfides for energy storage devices.
To develop new-generation all-solid-state hybrid supercapacitors (HSCs), bimetal sulfides are important electrode materials because of their superior electrochemical activity. A controlled self-sacrifice template strategy was explored to prepare a Zn-Co-S nanosheet array (NSA) as an electrode material. This controlled procedure contains three steps including the facile formation of a NSA on Ni foam (NF), the conversion of bimetal oxide by annealing in air, and the translation of bimetal sulfide through a S2- anion-exchange reaction. A specific capacitance of 1904 F g(-1) (952 C g(-1)) at 1 A g(-1) is demonstrated by the Zn-Co-S NSA/NF. In addition, we incorporated the Zn-Co-S NSA/NF into a HSC and verified its excellent energy density and stability over 5000 cycles. This research provides a feasible strategy to rationally prepare bimetal sulfides for energy storage devices.
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