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Xu, Jing; Jin, Yang; Liu, Kai; Lyu, Nawei; Zhang, Zili; Sun, Bin; Jin, Qianzheng; Lu, Hongfei; Tian, Huajun; Guo, Xin; Shanmukaraj, Devaraj; Wu, Hui; Li, Meicheng; Armand, Michel; Wang, Guoxiu
Science advances, 10/2022, Volume: 8, Issue: 40Journal Article
Recycling lithium from spent batteries is challenging because of problems with poor purity and contamination. Here, we propose a green and sustainable lithium recovery strategy for spent batteries containing LiFePO 4 , LiCoO 2 , and LiNi 0.5 Co 0.2 Mn 0.3 O 2 electrodes. Our proposed configuration of “lithium-rich electrode || LLZTO@LiTFSI+P3HT || LiOH” system achieves double-side and roll-to-roll recycling of lithium-containing electrode without destroying its integrity. The LiTFSI+P3HT-modified LLZTO membrane also solves the H + /Li + exchange problem and realizes a waterproof protection of bare LLZTO in the aqueous working environment. On the basis of these advantages, our system shows high Li selectivity (97%) and excellent Faradaic efficiency (≥97%), achieving high-purity (99%) LiOH along with the production of H 2 . The Li extraction processes for spent LiFePO 4 , LiNi 0.5 Co 0.2 Mn 0.3 O 2 , and LiCoO 2 batteries is shown to be economically feasible. Therefore, this study provides a previously unexplored technology with low energy consumption as well as high economic and environmental benefits to realize sustainable lithium recycling from spent batteries. The P3HT-modified LLZTO ceramic electrolyte enables high-purity lithium recycling from various spent batteries.
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