文献类型：期刊文献

英文题名：Ultra-fast leaching of critical metals from spent lithium-ion batteries cathode materials achieved by the synergy-coordination mechanism

作者：Xing, Lei[1];Bao, Jieru[2];Zhou, Shiyu[2];Qiu, Yulong[2];Sun, Hongji[2];Gu, Shuai[1,3,4];Yu, Jianguo[1,3]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Engn, Engn Res Ctr Salt Lake Resources Proc Engn, Shanghai, Peoples R China;[4]Hebei Desalinat Technol Innovat Ctr, Tangshan 063200, Hebei, Peoples R China

年份：2021

卷号：420

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20211610224500);WOS:【SCI-EXPANDED(收录号:WOS:000664253300005)】；

基金：This research was supported by the National Natural Science Foundation of China (Grant number U20A20142) and the Open Project of State Key Laboratory of Chemical Engineering (Grant number SKL-ChE-20C02).

语种：英文

外文关键词：Recycling; Correlation analysis; Cathode materials; Lithium and cobalt; Kinetics

摘要：Poor economics is the principal factor that hinders the commercialization of hydrometallurgy processing of spent lithium-ion batteries cathode materials. Here, ultra-fast leaching of spent cathode materials (97.72% Li and 97.25% Co leached under S/L ratio: 10 g/L, temperature: 363 K within 10 min) was achieved in 0.5 M hydrochloric acid and 0.5 M (L)-ascorbic acid system as part of reducing the costs of hydmmetallurgy process. The correlations of both acids with the leaching ratios were studied for the first time with the Pearson correlation coefficient. The mixture of 0.5 M hydrochloric acid and 0.5 M (L)-ascorbic acid demonstrated both faster kinetics and higher leaching volume than those of aqua regia. Adopting quantum chemistry and thermodynamic calculations, four hypothetical mechanisms were proposed to interpret the reaction mechanisms. Synergycoordination, with the lowest energy, was considered to be the most reasonable mechanism for the leaching of cathode materials. Three scenarios with different leaching systems and conditions were compared to identify the key parameters determining the economics of the leaching process.