作者: Zhixiang Tong , Yajun Ji , Qizhi Tian , Weimin Ouyang
DOI: 10.1039/C9CC04135D
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摘要: We report a simple route for high-density flower-like NiCo2O4 nanosheets with ultrahigh mass loading of 9.2 mg cm−2 on nickel foam to achieve superior capacitance. The as-assembled asymmetric supercapacitor yields high energy density 87.4 W h kg−1 and an excellent cycle life 93.2% capacitance retention after 11 000 cycles.