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中文摘要：
将经过1500次循环的废旧LiFePO4电池正极材料进行回收处理后，与导电碳黑、聚偏氟乙烯（PVDF）黏结剂按质量比80：15：5混合均匀重新制成正极片。以金属锂片为负极与其组装成半电池，通过充放电过程让负极的锂补充到待修复正极材料LixFePO4/C（0〈x〈1）中，达到修复再生的目的。结果表明：修复再生后的LiFePO4/C组装成半电池在0.1、0.5、1、5、10和15C倍率下放电比容量分别为150、141、131、111、79和50mA·h/g。而且经过不同倍率循环后，返回0.1C放电比容量相对于初始0.1C平均放电比容量无衰减。将修复再生后的电极片和待修复电极片分别与人工石墨负极组装成全电池，测得0.1C下首次的放电比容量分别为133和114mA·h/g，说明修复再生效果明显。
英文摘要：
The cathode materials of the spent lithium ion batteries after 1500 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 lithium foil as a counter electrode. The intercalation of Li from the lithium foil anode into the LixFePO4/C （0〈x〈1） cathode was conducted 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 50mA·h/g at 0.1, 0.5, 1, 5, 10 and 15C, respectively. When the current density decreases from 15C to 0.1C, the discharge capacity has no degradation, compared to the initial average discharge capacity at 0.1C. The comparison of the regenerated LiFePO4/C cathode and unregenerated LixFePO4/Ccathode was carried out based on full batteries with graphite electrode as anode. The regenerated cathode delivers an initial discharge capacity of 133mA·h/g at 0.1C, which is greater than 114mA·h/g of the unregenerated cathode.
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