H_(2)O-balance-regulated cation-anion competitive coordination for selective elements extraction from spent lithium-ion batteries  

作　　者：Mingqiang Cheng Yixin Hua Qibo Zhang Qihao Li Hongda Li Ding Wang Xianshu Wang Yun Zhao Juanjian Ru Baohua Li 

机构地区：[1]Faculty of Metallurgical and Energy Engineering,State Key Lab of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China [2]Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《eScience》2024年第6期118-126,共9页电化学与能源科学(英文)

基　　金：supported by the Yunnan Major Scientific and Technological Projects(202202AG050003);Yunnan Fundamental Research Projects(202201AT070148,202201BE070001-046,202401AT070368);Shenzhen Science and Technology Program(KCXST20221021111201003);the Excellent Youth Scholars Program of State Key Laboratory of Complex Nonferrous Metal Resource Clean Utilization,Kunming University of Science and Technology(YXQN-2024005).

摘　　要：Key resources necessary for lithium-ion batteries(LIBs)will deplete rapidly if recycling is not considered given the significant demand for LIBs.However,the current recovery method from spent LIBs is hindered by low efficiency,high energy consumption,and severe environmental issues,which curtail the sustainability of recycling industry.Here,we propose a new strategy for selective elements extraction from LiCoO_(2) based on H_(2)O-balance-regulated cation-anion competitive coordination.The lithium can be preferentially precipitated in deep eutectic solvents(DES)with an appropriate amount of H_(2)O.Such a preferential lithium behaviors contributes to the subsequent precise separation of transition metal elements by further adjusting the water content,thus enabling the recovery of all element and direct regeneration of DES for further spent LIB recycling.The developed DES-based technology can achieve the ultrahigh leaching efficiency of 99.99% for Li and Co with an acceptable recovery efficiency of Li and Co(≥91.23%)and a desirable purity of recycled Li_(2)C_(2)O_(4) and CoC_(2)O_(4)·2H_(2)O(≥98.43%).These Li and Co performances are still maintained at this level even after three-time regeneration of DES.This methodology can also be extended to other recycling chemistries of spent LIBs and lay the theoretical foundation for the recovery of valuable metals from spent battery materials using DESs with a simple process,low energy consumption,and waste-free recycling.

关 键 词：BATTERY LITHIUM ELEMENTS 

分 类 号：TM9[电气工程—电力电子与电力传动]