Lithium resurrection:Synergistic thermal-decomposition and electric-drive strategy enabling inactive lithium fully recycling  

作　　者：Shuzhe Yang Hao Luo Yukun Li Qingqing Gao Hui Li Hongwei Cai Xiaodan Li Yanfen Wen Yujin Tong Tiefeng Liu Mi Lu 

机构地区：[1]School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,Fujian,China [2]College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China [3]Quzhou Institute of Power Battery and Grid Energy Storage,Quzhou 324000,Zhejiang,China [4]Faculty of Physics,University of Duisburg-Essen,Duisburg D-47057,Germany

出　　处：《Journal of Energy Chemistry》2025年第3期842-851,共10页能源化学(英文版)

基　　金：supported by the Key Technologies R&D Program of Xiamen(No.3502Z20231057);the Natural Science Foundation of Fujian Province,China(No.2024J011210,No.2021J011214,No.2021J01685);the High-Level Talent Start-Up Foundation of Xiamen Institute of Technology for financial support(No.YKJ23017R);the Industry Leading Key Projects of Fujian Province(No.2022H0057);the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2020R01002);the Fujian Young and Middle-aged Teachers Teacher Education Research Project(Science and Technology)(No.JAT200461);2023 Xiamen Overseas Students Scientific Research Project(Start-up);the National Natural Science Foundation of China(No.21975212,No.22101242,No.52002352,No.52071295)。

摘　　要：Traditional pyrometallurgy and hydrometallurgy processes primarily focus on the recovery of valuable metals(Co,Ni,etc.)from spent lithium-ion batteries.However,these methods are not economical for recycling cheap LiFePO_(4).Herein,a synergistic thermal-decomposition and electric-drive strategy is proposed to recover the whole spent LiFePO_(4)electrode by in-situ recovering the inactive lithium(dead lithium and trapped interlayer lithium).Firstly,the organic components in the dense solid electrolyte interface(SEI)are effectively decomposed through thermal-decomposition processing,exposing the dead lithium encapsulated within the SEI and recovering the electron channels between the dead lithium and graphite.Leveraging the difference between the Gibbs free energy of the dead lithium and graphite as the driving force facilitates the dead lithium inserting into the anode.Then,fully utilizing the remaining discharge capacity of the spent LiFePO_(4)cell,the inactive lithium is reinserted into LiFePO_(4)lattice during the electric-drive process.Consequently,the reactivated lithium content increases by more than 16%,reaching a capacity of 134.2 mA h g^(-1)compared to 115.2 mA h g^(-1)from degraded LiFePO_(4),allowing for effective participation in the subsequent cycling.This work provides new perspectives on highly profitable cycles with low energy and material consumption and a low carbon footprint.

关 键 词：Lithium recovery THERMAL-DECOMPOSITION Electric-drive Inactive lithium Lithium resurrection 

分 类 号：TM912[电气工程—电力电子与电力传动]