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Amino Group-Aided Efficient Regeneration Targeting Structural Defects and Inactive FePO4 Phase for Degraded LiFePO4 Cathodes

文献类型：期刊论文

作者Liu, Yuanyuan1,2; Tu, Wenqian1,2; Bai, Jin2; Wang, Peiyao2; Mao, Yunjie1,2; Xiao, Ke1,2; Wang, Siya1,2; Qiu, Shiyu1,2; Zhu, Xuebin2; Lu, Wenjian2
刊名SMALL
出版日期2024-09-12
关键词associative priority degraded LiFePO4 cathodes direct regeneration solid-phase sintering thiourea-assisted
ISSN号1613-6810
DOI10.1002/smll.202405362
通讯作者Bai, Jin(jbai@issp.ac.cn) ; Lu, Wenjian(wjlu@issp.ac.cn) ; Zhao, Bangchuan(bchzhao@issp.ac.cn)
英文摘要It is urgent to develop efficient recycling methods for spent LiFePO4 cathodes to cope with the upcoming peak of power battery retirement. Compared with the traditional metallurgical recovery methods that lack satisfactory economic and environmental benefits, the direct regeneration seems to be a promising option at present. However, a simple direct lithium replenishment cannot effectively repair and regenerate the cathodes due to the serious structural damage of the spent LiFePO4. Herein, the spent LiFePO4 cathodes are directly regenerated by a thiourea-assisted solid-phase sintering process. The density functional theory calculation indicates that thiourea has a targeted repair effect on the antisite defects and inactive FePO4 phase in the spent cathode due to the associative priority of amino group (& horbar;NH2) in thiourea with Fe ions: Fe3+& horbar;N > Fe2+& horbar;N. Meanwhile, the pyrolysis products of thiourea can also create an optimal reducing atmosphere and inhibit the agglomeration of particles in the high temperature restoration process. The regenerated LiFePO4 exhibits an excellent electrochemical performance, which is comparable to that of commercial LiFePO4. This targeted restoration has improved the efficiency of direct regeneration, which is expected to achieve large-scale recycling of spent LiFePO4.
WOS关键词ION BATTERY CATHODES ; LITHIUM
资助项目CASHIPS Director's Fund ; National Key Research and Development Program[2017YFA0402800] ; Anhui Key Research and Development Program[2022a05020060] ; National Key Research and Development Program of China[2022YFA1403203] ; National Nature Science Foundation of China[U2032215] ; Instrument and Equipment Function Development Project of Chinese Academy of Sciences ; [YZJJ2021QN22] ; [YZJJ-GGZX-2022-01]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:001310495700001
出版者WILEY-V C H VERLAG GMBH
资助机构CASHIPS Director's Fund ; National Key Research and Development Program ; Anhui Key Research and Development Program ; National Key Research and Development Program of China ; National Nature Science Foundation of China ; Instrument and Equipment Function Development Project of Chinese Academy of Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135176]  
专题中国科学院合肥物质科学研究院
通讯作者Bai, Jin; Lu, Wenjian; Zhao, Bangchuan
作者单位1.Univ Sci & Technol China, Sci Isl Branch, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China
3.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yuanyuan,Tu, Wenqian,Bai, Jin,et al. Amino Group-Aided Efficient Regeneration Targeting Structural Defects and Inactive FePO4 Phase for Degraded LiFePO4 Cathodes[J]. SMALL,2024.
APA Liu, Yuanyuan.,Tu, Wenqian.,Bai, Jin.,Wang, Peiyao.,Mao, Yunjie.,...&Sun, Yuping.(2024).Amino Group-Aided Efficient Regeneration Targeting Structural Defects and Inactive FePO4 Phase for Degraded LiFePO4 Cathodes.SMALL.
MLA Liu, Yuanyuan,et al."Amino Group-Aided Efficient Regeneration Targeting Structural Defects and Inactive FePO4 Phase for Degraded LiFePO4 Cathodes".SMALL (2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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