文献类型：期刊文献

英文题名：Direct regeneration and performance of spent LiFePO4 via a green efficient hydrothermal technique

作者：Chen, Biaobing[1];Liu, Min[1];Cao, Shuang[1];Hu, Hui[1];Chen, Gairong[2];Guo, Xiaowei[2];Wang, Xianyou[1]

第一作者：Chen, Biaobing

通讯作者：Wang, XY[1]

机构：[1]Xiangtan Univ, Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stora, Hunan Prov Key Lab Electrochem Energy Storage & Co, Xiangtan 411105, Peoples R China;[2]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Xiangtan Univ, Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stora, Hunan Prov Key Lab Electrochem Energy Storage & Co, Xiangtan 411105, Peoples R China

通讯机构：[1]corresponding author), Xiangtan Univ, Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stora, Hunan Prov Key Lab Electrochem Energy Storage & Co, Xiangtan 411105, Peoples R China.

年份：2022

卷号：924

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20223112468971);Scopus(收录号：2-s2.0-85135104359);WOS:【SCI-EXPANDED(收录号:WOS:000880604400001)】；

基金：This work was supported financially by the National Natural Science Foundation of China (No. U19A2018) and the Key Project of Strategic New Industry of Hunan Province (No. 2019GK2032) , Hunan Provincial Innovation Foundation For Postgraduate (CX20210633, QL20210147) . The authors would like to thank Shiyanjia Lab ( www.shiyanjia.com ) for the materials characterization.

语种：英文

外文关键词：Spent lithium-ion batteries; Direct regeneration; Lithium iron phosphate; Tartaric acid; Hydrothermal technique

摘要：With the quick development of electric vehicles and grid energy storage, the demand and production of lithium ion batteries (LIBs) are rapidly increasing, and the problem of lithium resource shortage becomes more and more serious. Both in terms of economic value and environmental protection, the recycling and regeneration of the spent lithium batteries is extremely urgent. Herein, a green and efficient hydrothermal technique for direct regeneration of spent lithium iron phosphate (LiFePO4 or LFP) was proposed. LFP loses the partial lithium during the long cycle and converts to FePO4 (FP), therefore, the replacement of the lost lithium is crucial for the regeneration of spent LFP. Herein, the effects of hydrothermal conditions such as reaction temperature, Li+ concentration and reducing agent concentration on the performance of product are systemically studied. Besides, it has been found that the control of hydrothermal condition is conductive to the supplement of Li and the enhancement of electrochemical performance of the product. Under hy-drothermal conditions of 200 degrees C for 3 h, the regenerated LFP shows the optimal electrochemical perfor-mance of 165.9, 151.93, 145.92, 133.11 and 114.96 mAh g-1 at 0.1, 0.5, 1, 2, and 5 C, respectively. In addition, the capacity retention is as high as 99.1% after 200 cycles at 1 C. Therefore, this work provides a new idea for the direct regeneration of spent LFP cathode materials.(c) 2022 Elsevier B.V. All rights reserved.