【摘 要】
：
Graphite anode materials are widely used in commercial lithium-ion batteries;however,the long elec-tron/ion transportation path restricted its high energy stor-age.In this experiment,we designed a copper/graphite composite with a dual three-dimensional(3D
【机 构】
：
State Key Laboratory of Separation Membrane and Membrane Processes,Tianjin Municipal Key Laboratory
论文部分内容阅读
Graphite anode materials are widely used in commercial lithium-ion batteries;however,the long elec-tron/ion transportation path restricted its high energy stor-age.In this experiment,we designed a copper/graphite composite with a dual three-dimensional(3D)continuous porous structure combining used nonsolvent-induced phase separation and heat treatment,in which a large amount of graphite is embedded in the 3D porous copper/carbon architecture.In the novel structure,not only the electron and Li+transmission performances are improved,but also the space of current collector is fully utilized.Meanwhile,carbonized polyacrylonitrile network stabilizes the inter-face between graphite and copper matrix.The obtained copper/graphite composite anode has an initial discharge capacity of 524.6 mAh·g-1,a holding capacity of 350 mAh·g-1and excellent cycle stability(299.3 mAh·g-1 after 180 cycles at 0.1C rate),exhibiting good electro-chemical performance.The experimental results show that the mass loading of the copper/graphite composite elec-trode material is about 4.39 mg·cm-2.We also envisage replacing graphite with other high-capacity active materials to fill the current collector,which can provide a reference for the future development of next-generation advanced electrodes.
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