文献类型：期刊文献

英文题名：Regeneration and performance of LiFePO4 with Li2CO3 and FePO4 as raw materials recovered from spent LiFePO4 batteries

作者：Chen, Biaobing[1];Liu, Min[1];Cao, Shuang[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, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Sch Chem,Natl Base Int Sci & Technol Cooperat, Xiangtan 411105, Peoples R China;[2]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Xiangtan Univ, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Sch Chem,Natl Base Int Sci & Technol Cooperat, Xiangtan 411105, Peoples R China

通讯机构：[1]corresponding author), Xiangtan Univ, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Sch Chem,Natl Base Int Sci & Technol Cooperat, Xiangtan 411105, Peoples R China.

年份：2022

卷号：279

外文期刊名：MATERIALS CHEMISTRY AND PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000764141100005)】；

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).

语种：英文

外文关键词：Spent lithium-ion batteries; Recycling; Lithium iron phosphate; Carbon thermal reduction; Carbon coating

摘要：The shortage of lithium resource has become a serious problem due to the ever-increasing demands for lithium ions batteries (LIBs) in the fields of electric vehicle and grid energy storage. It is imperative to recycle LIBs whether from the perspective of value recovery or environmental protection. Herein, a new method for recovering FePO4 and Li2CO3 from spent LiFePO4 cathode materials is proposed. LiFePO4 was synthesized by carbothermal reduction based on the recovered FePO4 and Li2CO3. It is well known that LiFePO4 has poor electronic conductivity and ionic conductivity. In order to improve its electrochemical performance, accelerate the transport speed of lithium ions in the material, and improve its conductivity, a series of samples with different carbon coating contents are prepared. The physicochemical and electrochemical performances are characterized by Xray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. The results show that when the carbon is 12 wt% of the LiFePO4 composite total weight, the sample (LFP-G12) has better electrochemical performance. LFPG12 has a high initial discharge specific capacity of 146.89 mAh g(-1) at 1 C with 97.9% of the initial capacity was retained after 200 cycles. Thus, this paper offers a brand-new way for recycling and directly using the spent LiFePO4 to prepare LiFePO4 cathode material. [GRAPHICS] .