首页|废旧锂离子电池负极石墨循环再生的研究进展

废旧锂离子电池负极石墨循环再生的研究进展

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锂离子电池使用6~8年后,其容量会出现一定程度的衰减,从而产生大量废弃物.负极石墨在电池中质量分数占比为12%~21%,对其回收利用有利于保护环境和发展经济.针对废旧锂离子电池负极石墨再生为电池级石墨的方法展开综述,主要介绍了浸出煅烧组合、石墨表面涂覆、制备复合材料和杂原子掺杂的方法,并在能耗、电化学性能等方面做了简要比较.目前,在众多再循环方向中,将废旧石墨再生为电池级石墨是最合适的路径,而且能从根源上解决负极材料的再生问题.在此基础上,未来应开发更加高效环保的浸出剂,寻求多路径的低温煅烧方法,尝试其他高容量负极材料与废旧石墨复合或者石墨表面的低成本涂层,加强杂原子在石墨中掺杂机理的研究.
Review on recycling of graphite anode from spent lithium-ion batteries
Lithium-ion battery capacity will reduce to a certain extent after used for 6-8 years and a large amount of waste are generated.The graphite anode accounts for 12%—21%of battery and its recycling is beneficial to the environment protection and economic development.In this paper,the regenerating methods of spent graphite anode into battery-grade graphite are summarized,which include the combination of leaching and calcination,graphite surface coating,preparation of composite materials and heteroatom doping.A brief comparison of these methods is also presented in terms of energy consumption and electrochemical performance.At present,direct regeneration for lithium-ion batteries is considered as the most suitable method for the regeneration of anode materials.In the future,more efficient and eco-friendly leaching agents and the multi-path low-temperature calcination methods should be investigated.In addition,high-capacity anode materials should be studied to composite with spent graphite,as well as the development of low-cost coating on the surface of graphite.Furthermore,the doping mechanism of heteroatoms in graphite is a direction worthy of research.

spent lithium-ion batteriesgraphiteregenerationrecoverywaste treatment

楚振普、陈禹蒙、李俊国、孙庆轩、刘科

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南方科技大学化学系,广东深圳 518055

深圳职业技术学院机电工程学院,广东深圳 518055

南方科技大学创新创业学院,广东深圳 518055

广东省催化重点实验室,广东 深圳 518055

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废旧锂离子电池 石墨 再生 回收 废物处理

深圳市科技计划广东省催化重点实验室项目

KQTD201804111434183612020B121201002

2024

化工进展
中国化工学会,化学工业出版社

化工进展

CSTPCD北大核心
影响因子:1.062
ISSN:1000-6613
年,卷(期):2024.43(3)
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