Recycling millions of metric tons of spent LiFePO4 batteries would benefit human health while reducing resource depletion and environmental pollution.However,recovering individual elements from the spent batteries without generating waste is challenging.Here,we present a distinctive approach for recycling spent LiFePO4 batteries at room temperature,where water is the only leaching agent consumed.FePO4 and lithium intercalated graphite act as a precursor material for selectively extracting lithium,iron,and phosphorus through charging the LiFePO4 batteries to the delithiated state.NaOH solu-tion extracted Fe from FePO4 within 30 min and regener-ated without consumption,similar to a catalyst.Under the optimal leaching conditions(1 mol·L-1 NaOH,0.5 h,NaOH/Fe molar ratio of 4.5),Fe and P leaching efficiencies achieved 89.1％and 99.2％,respectively.The methodology reflected in this research reduced the material cost per kg cathode material to a fraction of previously published reports,only occupies 6.13％of previous reports.In addi-tion,the method improved the battery recycling revenue calculated by the EverBatt model by 2.31 times and 1.94 times over pyrometallurgical and hydrometallurgical methods.The proposed method allows for the convenient recovery of the elemental components of spent LiFePO4 batteries.

Mei-Cen Fan;Yun Zhao;Yu-Qiong Kang;John Wozny;Zheng Liang;Jun-Xiong Wang;Guang-Min Zhou;Bao-Hua Li;Naser Tavajohi;Fei-Yu Kang

Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School(SIGS),Shenzhen 518055,China;Department of Chemistry and Biochemistry,Northern Illinois University,Dekalb 60115,USA;School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,Shanghai Jiao Tong University,Shanghai 200240,China;Shenzhen Geim Graphene Center,Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;Department of Chemistry,Ume? University,Ume? 90187,Sweden

稀有金属（英文版）

[1]Mei-Cen Fan;Yun Zhao;Yu-Qiong Kang;John Wozny;Zheng Liang;Jun-Xiong Wang;Guang-Min Zhou;Bao-Hua Li;Naser Tavajohi;Fei-Yu Kang-.Room-temperature extraction of individual elements from charged spent LiFePO4 batteries)[J].稀有金属（英文版）,2022(05):1595-1604

delithiated,regener,EverBatt

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