首页|Structural Restoration of Degraded LiFePO4 Cathode with Enhanced Kinetics Using Residual Lithium in Spent Graphite Anodes
Structural Restoration of Degraded LiFePO4 Cathode with Enhanced Kinetics Using Residual Lithium in Spent Graphite Anodes
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Enormous LiFePO4(LFP)/graphite batteries retired from the market need urgent rational disposal and reutilization based on the degradation analysis of the evolutional mechanism for electrodes.Typically,Li inventory loss is one of the main reasons for the degradation of LFP-based batteries.The reduced portion of lithium in a cathode is inevitably consumed to form solid electrolyte interphase or trapped in the anode.Herein,we propose a comprehensive strategy for battery recycling and conduct the work by simply regenerating the degraded LFP materials directly with the extracted lithium compounds from spent anodes.Moreover,inter-particle three-dimensional(3D)conductive networks are built via an in situ carbonization to reinforce the electronic conductivity of regenerated cathodes.An improved electrochem-ical performance was achieved in the regenerated LFP materials even compared with the pristine LFP.This integrated recycling strategy not only brings more added value to the recycled materials by leveraging the recycling process but also aims to apply the concept of"treating waste with waste"and spur innovations in battery recycling technologies in the future.
Min Fan、Xin Chang、Xin-Hai Meng、Chao-Fan Gu、Chao-Hui Zhang、Qinghai Meng、Li-Jun Wan、Yu-Guo Guo
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CAS Key Laboratory of Molecular Nanostructure and Nanotechnology,CAS Research/Education Center for Excellence in Molecular Sciences,Beijing National Laboratory for Molecular Sciences(BNLMS),Institute of Chemistry,Chinese Academy of Sciences(CAS),Beijing 100190
University of Chinese Academy of Sciences,Beijing 100190
Basic Science Center Project of the National Natural Science Foundation of China国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金中国科学院战略规划重点项目
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