Graphite Regeneration and NCM Cathode Type Synthesis from Retired LIBs by Closed-Loop Cycle Recycling Technology of Lithium-Ion Batteries

被引:0
|
作者
Kosenko, Alexandra [1 ]
Pushnitsa, Konstantin [1 ]
Chernyavsky, Vladislav [1 ]
Novikov, Pavel [1 ]
Popovich, Anatoliy A. [1 ]
机构
[1] Peter Great St Petersburg Polytech Univ, Lab Synth New Mat & Struct, St Petersburg 195221, Russia
关键词
spent graphite anode; regeneration; LiCoO2; NCM cathode; retired lithium-ion batteries; recycling; SPENT GRAPHITE; RECENT PROGRESS; ANODE MATERIALS; PERFORMANCE; REUSE;
D O I
10.3390/en17225570
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A closed-loop regeneration process for spent LiCoO2 has been successfully designed with prior synthesis of LiNixCoyMnzO2, by the authors. This research applies the methodology to lithium-ion battery anodes, using spent graphite from a decommissioned battery in a leaching process with 1.5 mol center dot L-1 malic acid and 3% H2O2 alongside LiCoO2. The filtered graphite was separated, annealed in an argon atmosphere, and the filtrate was used to synthesize NCM cathode material. Characterization involved X-ray diffraction, EDX, and SEM techniques. The regenerated graphite (RG) showed a specific discharge capacity of 340.4 mAh/g at a 0.1C rate in the first cycle, dropping to 338.4 mAh/g after 55 cycles, with a Coulombic efficiency of 99.9%. CV and EIS methods provided further material assessment. In a related study, the SNCM111 synthesized from the leaching solution showed a specific discharge capacity of 131.68 mAh/g initially, decreasing to 115.71 mAh/g after 22 cycles.
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页数:16
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