In this study, a zeolitic imidazolate framework-67 (ZIF-67) was prepared as a precursor using a facile hydrothermal method. After a calcination reaction in the air, the as-prepared precursor was converted to porous thin-wall hollow Co₃O₄ with its original frame structure almost preserved. The physical and chemical characterizations of the nanomaterial were analyzed systemically. The electrochemical tests indicate that the obtained Co₃O₄ possesses large specific capacitances of 988 and 925 F/g at 1 and 20 A/g accompanying an outstanding rate capability (a 93.6% capacitance retention) and retains 96.6% of the specific capacitance, even after 6000 continuous charge/discharge cycles. These excellent properties mark the Co₃O₄ a promising electrode material for high performance supercapacitors.

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facile hydrothermal imidazolate framework67 925 thinwall hollow cosub3subosub4sub specific capacitances of 988 rate capability capacitance performance supercapacitors

Xiao Fan,Yongjiao Sun,Per Ohlckers,Xuyuan Chen,.Porous Thin-Wall Hollow Co₃O₄ Spheres for Supercapacitors with High Rate Capability. 9 (21),.

Xiao Fan,Yongjiao Sun,Per Ohlckers,Xuyuan Chen,"Porous Thin-Wall Hollow Co₃O₄ Spheres for Supercapacitors with High Rate Capability" 9

Xiao Fan,Yongjiao Sun,Per Ohlckers,Xuyuan Chen,"Porous Thin-Wall Hollow Co₃O₄ Spheres for Supercapacitors with High Rate Capability"