Direct regeneration of severely damaged spent LiFePO4 cathodes
简介：Recycling of spent lithium iron phosphate(LiFePO4,LFP)cathode materials is an encouraging way of re-source reuse to alleviate environmental issues.Nevertheless,traditional regeneration techniques are usu-ally too complicated and difficult to industrialize,especially no longer applicable to severely degraded LFP cathodes.Herein,we report a novel physically confined-domain pressure sintering method for large-scale direct regeneration of severely degraded spent LFP cathodes(＜20％residual capacity).By constructing physically confined domains,the interface interaction between lithium ions(Li+)and the cathode is en-hanced and the potential barrier during relithiation is thus decreased,facilitating the insertion of Li+into vacancies.The internal residual conductive carbon builds a reduced circumstance to promote the conver-sion of the Fe(Ⅲ)to Fe(Ⅱ)phase and reduce the Li-Fe anti-site(FeLi)defects.The broken small particles(heterogeneous phase)are in-situ re-synthesized into complete olivine structures driven by external pres-sures.The capacity retention of the regenerated LFP cathodes was 88.8％after 1500 cycles at 5 C.This work provides one-step,highly efficient,and scalable technology for direct regeneration of severely de-graded LFP into high-performance cathode materials.展开
学者：ChengXuanCaoZhanqiXingShaochunTang
关键词：LiFePO4Physically confined-domainDirect regenerationSeverely degraded LFP cathodes
在线出版日期：2026-01-27 （网站首发日期）
