【作者】 胥亚楠； 董艳影； 王一菁； 袁华堂； 焦丽芳； 李菁；

【Author】 XU Yanan;DONG Yanying;WANG Yijing;YUAN Huatang;JIAO Lifang;Li Jing;College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University;

【机构】 南开大学化学学院天津化学化工协同创新中心先进能源材料教育部重点实验室；

【摘要】 <正>将废旧锂电池中回收的钴酸锂材料首次应用于水相的电容器体系,使用廉价DMF作为溶剂回收钴酸锂的溶剂回收法具有价格低廉,操作简便的优点,适合大规模工业生产。在2Ag^-1电流密度下,回收的钴酸锂材料最大放电容量为654 F g^-1,且循环4000周后容量保持率仍为更多还原

【Abstract】 A new recycling way for simply recovered Li CoO₂ from LIBs is proposed to serve as a high-performance supercapacitor material in aqueous system for the first time. Solvent method to recover Li CoO₂ scraps is characterized by low cost, simple technique and suitable for industrial largescale application. The recovered Li CoO₂ sample displays the maximum capacitance of 654 F g^-1 with capacity retention rate of 86.9 % after 4000 cycles at 2 A g^-1. Excellent electrochemical capacitive behaviors demonstrate that the recovered Li CoO₂ material is a promising candidate for pseudocapacitor, which could overcome not only the serious resource waste and environment contamination of spent LIBs, but also the high-cost restriction of supercapacitor practical application. So it is hopeful for the recovered Li CoO₂ material to be used in a aqueous-medium secondary batterysupercapacitor hybrid system, which has advantages of cost-effect, friendly environment, safety, high energy density and power density.更多还原