期刊
APPLIED SURFACE SCIENCE
卷 503, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.144090
关键词
Co-MOF; 3DHG; 3DPC/Co3O4; Supercapacitor
类别
资金
- National Defence Pre-research Foundation of China [30110020302]
The three-dimensional porous carbon (3DPC)/Co3O4 composites were prepared via pyrolysis of 3D graphene/Co-MOF precursor. The rich carbon content, amorphous state and hierarchical porous structure remarkably accelerated electron and ion transport. The oxygen-deficient Co3O4 state provided more active sites. Consequently, the 3DPC/Co3O4 electrode delivered enhanced capacitive performance owing to these advantages, which exhibited a high specific capacitance of 423 F g(-1) at 1 A g(-1), good rate capability of 85.7% capacitance retention even at 10 A g(-1), and ideal durability with about 17% capacitance decay after 2000 cycles. Moreover, the 3DPC/Co3O4//AC asymmetric supercapacitor exhibited a broad potential window of 1.7 V and a maximum energy density of 21.1 Wh kg(-1) with a power density of 790 W kg(-1).
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