An economical effective method is developed for recycling spent LiNi_1/3Co_1/3Mn_1/3O₂ cathodes, where more than 98% Li, Co, Ni and Mn can be leached out with different organic acids, and resynthesized to LiNi_1/3Co_1/3Mn_1/3O₂. The leaching mechanism is investigated at macro- and micro-scales. The particles undergo a loosening-breaking-shrinking change for two acids, while the FTIR and UV-vis spectra indicate different coordination reactions. The performance of LiNi_1/3Co_1/3Mn_1/3O₂ resynthesized from the leachate of the acetic acid leaching (NCM-Ac) and maleic acid leaching (NCM-Ma) are compared. The first discharge capacity of NCM-Ma and NCM-Ac at 0.2C are 151.6 and 115.0 mA h g⁻¹, respectively. The much better performance of NCM-Ma than NCM-Ac results from the different coordination of the two acids in the sol-gel process, where the maleic acid can esterify to establish a stable network to chelate metal ions, while the weak chelation of acetic acid leads to the formation of impurities. The economics analysis including the cost of leaching acid and energy consumption shows that the price of organic acids and reducing agents, short leaching time, low temperature and high-valued products are the effective way to increase recycling and environmental benefits, which shows advantages in terms of resources cost and added value.

开发了一种经济有效的方法来回收废旧的LiNi _1/3 Co _1/3 Mn _1/3 O ₂阴极，其中可以用不同的有机酸浸出98％以上的Li，Co，Ni和Mn，然后重新合成为LiNi _1/3 Co _1/3 Mn _1/3 O ₂。在宏观和微观尺度上研究了浸出机理。两种酸的颗粒经历了松散-收缩-收缩的变化，而FTIR和UV-vis光谱表明不同的配位反应。LiNi _1/3 Co _1/3 Mn _1/3 O _2的性能比较了从乙酸浸出液（NCM-Ac）和马来酸浸出液（NCM-Ma）再生的合成液。NCM-Ma和NCM-Ac在0.2C时的首次放电容量分别为151.6和115.0 mA hg ^-1， 分别。NCM-Ma的性能比NCM-Ac更好，这是由于两种酸在溶胶-凝胶过程中的配位不同，其中马来酸可以酯化以建立稳定的网络来螯合金属离子，而乙酸的螯合力弱。酸会导致杂质的形成。包括浸出酸成本和能源消耗在内的经济学分析表明，有机酸和还原剂的价格，浸出时间短，低温和高价值产品是增加回收利用和环境效益的有效途径，这在优势上显示出优势。资源成本和附加值。