期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 11, 页码 2777-2785出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00651
关键词
Metal sulfides; Crystal design; Ion-exchange; Electrochemical properties
资金
- Natural Science Foundation of China [21103153, 21443003, U1407103]
- Education Department of Henan Province Science and Technology Research key project-basic research plan [13A150648]
- specialized research Foundation of Zhengzhou University [1421316035]
Studies on supercapacitor devices constitute one of the most meaningful research topics in hastening the industrialization of electrode materials. Herein, uniform nanosheet-based carambola-like Ni@Ni1.5Co1.5S2 was successfully synthesized and assembled into an asymmetric supercapacitor device with a high specific capacitance of 109 F g(-1) at a current density of 1 A g(-1). The large mass loading of this device, at similar to 20 mg cm(-2), is compatible with the industry standard and considerably higher than those obtained in previous reports. The Ni@Ni1.5Co1.5S2-based supercapacitor device exhibited excellent cycling stability with virtually no decrease in capacitance after 2000 cycles, and achieved a high energy density of 65.7 W h kg(-1) at a power density of 22.2 W kg(-1) and a high power density of 3 kW kg(-1) at energy density of 6.2W h kg(-1). These outstanding characteristics of Ni@Ni1.5Co1.5S2 as an electrode material for supercapacitor devices verify its promising applicability in the energy storage field.
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