采用高温热解将Hummers法制备的氧化石墨(GO)还原并与多孔碳(DK)复合制得石墨烯-多孔碳(RE-RGO-DK),再利用化学法制得石墨烯-多孔碳/硫(RE-RGO-DK/S)正极复合材料。结果表明,该复合材料为蜂窝状形貌和笼状结构的无定形碳,表面被石墨烯覆盖。电化学性能测试结果显示,RE-RGO-DK/S首次放电比容量为1132mAh/g,50次充放电循环后比容量仍能保持640mAh/g,表现出良好的循环性能。
Graphene oxide (GO) and porous carbon (DK) were synthesized by high temperature pyrolysis to obtain graphene-porous carbon material,and RE-RGO-DK/S anode composites were prepared by chemical method.The composite material had amorphous carbon structure coupled with honeycomb morphology and cage structure,and its surface covered with graphene.Characterized by electrochemical performance,the first discharge specific capacity was 1132mAh/g,and remained 640mAh/g after 50 charge-discharge cycles,which indicated good cycle stability.
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基金资助
国家国际科技合作专项资助项目(2015DFR50350);国家自然科学基金资助项目(21503166);陕西省科技计划项目(2017GY-160);西安理工大学科技创新计划资助项目(2015CX011)
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