Porous carbon derived from metal–organic framework@graphene quantum dots as electrode materials for supercapacitors and lithium-ion batteries |
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| Authors: | Hui Yu Wenjian Zhu Hu Zhou Jianfeng Liu Zhen Yang Xiaocai Hu Aihua Yuan |
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| Affiliation: | School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003 China.; School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003 China ; Shanghai Waigaoqiao Shipbuilding Co., Ltd, Shanghai 200137 China ; Marine Equipment and Technology Institute, Jiangsu University of Science and Technology, Zhenjiang 212003 China |
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| Abstract: | The C@GQD composite was prepared by the combination of metal–organic framework (ZIF-8)-derived porous carbon and graphene quantum dots (GQDs) by a simple method. The resulting composite has a high specific surface area of 668 m2 g−1 and involves numerous micro- and mesopores. As a supercapacitor electrode, the material showed an excellent double-layer capacitance and a high capacity retention of 130 F g−1 at 2 A g−1. The excellent long-term stability was observed even after ∼10 000 charge–discharge cycles. Moreover, the composite as an anode material for a lithium-ion battery exhibited a good reversible capacity and outstanding cycle stability (493 mA h g−1 at 100 mA g−1 after 200 cycles). The synergistic effect of a MOF-derived porous carbon and GQDs was responsible for the improvement of electrochemical properties.The C@GQD composite was prepared by the combination of metal–organic framework (ZIF-8)-derived porous carbon and graphene quantum dots (GQDs) by a simple method. |
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