废锂离子电池石墨负极综合回收利用研究进展

Research Progress in Comprehensive Recycling Graphite Anode in Spent Lithium-Ion Batteries

综述了废锂离子电池石墨负极的综合回收利用技术,包括湿法、火法-湿法联合以及物理法回收工艺,并对各工艺的优缺点进行了深入分析。特别指出,尽管目前存在多种回收技术,但高效、环保的闭环回收工艺仍面临挑战。探讨了废石墨负极材料的资源化再利用途径,如作为二次电池负极材料、制备石墨烯等,并对未来研究方向进行了展望,旨在为废锂离子电池石墨负极的高值化利用提供理论支持和技术支持。建议未来的研究关注开发简单、高效、清洁的闭环回收工艺,提高石墨负极材料的回收率和纯度,同时减少环境污染。未来研究的热点应包括石墨负极材料的晶格重构修复技术,以及探索石墨负极材料在储能材料、催化剂、吸附剂等领域的新应用。

A review of comprehensive recycling technologies for graphite anodes in spent lithium-ion batteries is presented,including hydrometallurgical process,a combination of pyrometallurgical and hydrometallurgical process,as well as mechanical recycling.And then,an in-depth analysis of advantages and disadvantages of each technology is also presented.It is particularly pointed out that there are various recycling technologies,but the development of an efficient and environmentally-friendly closed-circuit recycling process still faces challenges.The recycling approaches of graphite anodes in spent lithium-ion batteries are discussed in details,such as usage as anodes of rechargeable batteries,or for preparation of graphene.The research direction in the future is also forecasted aiming to provide theoretical and technical support for reutilization of graphite anodes in spent lithium-ion batteries with high-value added.It is suggested that research should focus on developing a simple,efficient and clean closed-circuit recycling processes to improve the recovery rate and purity of graphite anode materials while reducing environmental pollution.The research hotspots in the future should include lattice reconstruction and repairing technologies for graphite anode materials,as well as exploration of new applications of graphite anode materials in the fields of energy storage materials,catalysts,adsorbents among others.