首页|Tailoring crystal plane of short-process regenerated LiFePO4 towards enhanced rate properties

Tailoring crystal plane of short-process regenerated LiFePO4 towards enhanced rate properties

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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 com-plex 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 mA 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 mecha-nism of internal plane about regenerated materials,whilst providing effective strategies for high-performance regenerated LFP.

Spent lithium-ion batteryLiFePO4RegenerationCrystal orientationElectrochemical performance

Shuya Lei、Jiexiang Li、Lei Hu、Dongbin Qiao、Wei Sun、Peng Ge、Yue Yang

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School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China

Guangxi Huayou Resources Recycling Technology Co.,Ltd,Yulin 537006,Guangxi,China

Huayou New Energy Technology Co.,Ltd,Quzhou 324000,Zhejiang,China

Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization,Central South University,Changsha 410083,Hunan,China

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2024

10.1016/j.jechem.2024.07.065

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.99(12)