硅酸盐学报Issue(8)：1051-1056,6.DOI:10.7521/j.issn.0454-5648.2013.08.05
废旧锂离子电池正极材料LiFePO4/C的电化学修复再生
Electrochemical Regeneration of LiFePO4/C Cathode Materials from Spent Lithium Ion Batteries
摘要
Abstract
The cathode materials of the spent lithium ion batteries after 1 500 cycles were recovered, and mixed with carbon black and polyvinylidene fluoride (PVDF) binder (the mass ratio was 80:15:5) to obtain the regenerated cathodes. The half cells employed lith-ium foil as a counter electrode. The intercalation of Li from the lithium foil anode into the LixFePO4/C (0<x<1) cathode was con-ducted through charging and discharging to realize the regeneration of spent materials. The results indicate that the regenerated LiFePO4/C vs. lithium metal electrode can deliver the discharge capacities of 150, 141, 131, 111, 79 and 50 mA·h/g at 0.1, 0.5, 1, 5, 10 and 15 C, respectively. When the current density decreases from 15 C to 0.1 C, the discharge capacity has no degradation, compared to the initial average discharge capacity at 0.1 C. The comparison of the regenerated LiFePO4/C cathode and unregenerated LixFePO4/C cathode was carried out based on full batteries with graphite electrode as anode. The regenerated cathode delivers an initial discharge capacity of 133 mA·h/g at 0.1 C, which is greater than 114 mA·h/g of the unregenerated cathode.关键词
废旧锂离子电池/磷酸铁锂/修复再生/电化学性能Key words
spent lithium ion battery/lithium iron phosphate/regeneration/electrochemical property分类
信息技术与安全科学引用本文复制引用
杨则恒,张俊,吴情,支莉华,张卫新..废旧锂离子电池正极材料LiFePO4/C的电化学修复再生[J].硅酸盐学报,2013,(8):1051-1056,6.基金项目
国家自然科学基金(20976033，21176054，21271058)资助。 （20976033，21176054，21271058）
