Tailoring crystal plane of short-process regenerated LiFePO_(4) towards enhanced rate properties  

作　　者：Shuya Lei Jiexiang Li Lei Hu Dongbin Qiao Wei Sun Peng Ge Yue Yang 

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China [2]Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization,Central South University,Changsha 410083,Hunan,China [3]Guangxi Huayou Resources Recycling Technology Co.,Ltd,Yulin 537006,Guangxi,China [4]Huayou New Energy Technology Co.,Ltd,Quzhou 324000,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第12期458-465,共8页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52374290,52374288 and 52204298);the Innovation-driven Program of Central South University(2023CXQD009);the Hunan Provincial Innovation Foundation for Postgraduate(2024ZZTS0059);the Young Elite Scientists Sponsorship Program by China Association for Science and Technology(2022QNRC001);the National Key Research and Development Program of China(2022YFC3900805-4/7);the Hunan Provincial Education Office Foundation of China(21B0147)。

摘　　要：Captured by the environmental and economic value,the recycling of spent lithium iron phosphate(LFP)batteries has attracted numerous attentions.However,hydrometallurgical method still suffers from complex process,and hydrothermal method is limited by morphology control,ascribed to the strong polarity of water.Herein,supported by ethanol as crystal surface modifier,the regular(010)orientation and short b-axis are effectively tailored for regenerated LFP.As Li-storage cathode,the capacities of as-optimized LFP could reach up to 157.07 mA h g^(-1)at 1 C,and the stable capacity of 150.50 mA h g^(-1)could be remained with retention of 93.48%after 400 cycles at 1 C.Even at 10 C,their capacity could be still kept about 119.3 m A h g^(-1).Assisted by the detail analysis of adsorption energy,the clear growth mechanism is proposed,the lowest adsorbing energy(-4.66 eV)of ethanol on(010)crystal plane renders the ordered growth along(010)crystal plane.Given this,the work is expected to shed light on the tailoring mechanism of internal plane about regenerated materials,whilst providing effective strategies for highperformance regenerated LFP.

关 键 词：Spent lithium-ion battery LiFePO_(4) REGENERATION Crystal orientation Electrochemical performance 

分 类 号：TQ131.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]