Targeted Defect Repair and Multi-functional Interface Construction for the Direct Regeneration of Spent LiFePO<sub>4</sub> Cathodes

doi:10.1002/adma.202414048

IMR OpenIR

	Targeted Defect Repair and Multi-functional Interface Construction for the Direct Regeneration of Spent LiFePO₄ Cathodes
	Cao, Yang 1,2,3; Li, Junfeng 2,3; Tang, Di 2,3; Zhou, Fei 1; Yuan, Mengwei 4,5; Zhu, Yanfei 2,3; Feng, Chengzhi 1; Shi, Ruyu 2,3; Wei, Xijun 1,2,3; Wang, Boran 2,3; Song, Yingze 1; Cheng, Hui-Ming 6,7; Zhou, Guangmin 2,3
通讯作者	Wei, Xijun(xijunwei1992@swust.edu.cn) ; Wang, Boran(wangbr93@sz.tsinghua.edu.cn) ; Cheng, Hui-Ming(cheng@imr.ac.cn) ; Zhou, Guangmin(guangminzhou@sz.tsinghua.edu.cn)
	2024-10-11
发表期刊	ADVANCED MATERIALS
ISSN	0935-9648
页码	11
摘要	Due to the low economic benefits and environmental pollution of traditional recycling methods, the disposal of spent LiFePO4 (SLFP) presents a significant challenge. The capacity fade of SLFP cathode is primarily caused by lithium loss and formation of a Fe (III) phase. Herein, a synergistic repair effect is proposed to achieve defect repair and multi-functional interface construction for the direct regeneration of SLFP. Tannic acid (TA) forms a compact coating precursor for a carbon layer on SLFP with abundant functional groups and creates a mildly acidic environment to enhance the reducibility of thiourea (TU). Therefore, TU reduces Fe (III) to Fe (II) and repairs Li-Fe anti-site defects of SLFP, while at the same time acting as a source of N/S-doping elements for the carbon layer at a lower temperature (140 degrees C). The multi-functional carbon layer improves the properties of the regenerated LiFePO4 (RLFP) due to the enhanced conductivity, structure maintenance and protection, and the improved kinetics of Li+ transport. Furthermore, the Fe & horbar;O and P & horbar;O bonds are strengthened, further enhancing the structural stability of the RLFP. Consequently, the RLFP demonstrates outstanding performance with a discharge capacity of 141.3 mAh g(-1) and capacity retention of 72% after 1000 cycles at 1 C.
关键词	direct regeneration element doping Fe & horbar spent LiFePO4 O and P & horbar O bonds
资助者	Natural Science Foundation of Sichuan Province ; National Key Research and Development Program of China ; Joint Funds of the National Natural Science Foundation of China ; Shenzhen Science and Technology Program ; Guangdong Innovative and Entrepreneurial Research Team Program ; Interdisciplinary Research and Innovation Fund of Tsinghua Shenzhen International Graduate School, Natural Science Foundation of Sichuan Province ; Project of the Southwest University of Science and Technology
DOI	10.1002/adma.202414048
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Sichuan Province[2021YFB2500200] ; National Key Research and Development Program of China[U21A20174] ; Joint Funds of the National Natural Science Foundation of China[RCBS20231211090637065] ; Shenzhen Science and Technology Program[2021ZT09L197] ; Guangdong Innovative and Entrepreneurial Research Team Program[2023NSFSC1128] ; Interdisciplinary Research and Innovation Fund of Tsinghua Shenzhen International Graduate School, Natural Science Foundation of Sichuan Province[20zx7142] ; Project of the Southwest University of Science and Technology
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001336704300001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190735
专题	中国科学院金属研究所
通讯作者	Wei, Xijun; Wang, Boran; Cheng, Hui-Ming; Zhou, Guangmin
作者单位	1.Southwest Univ Sci & Technol, Engn Res Ctr Biomass Mat, Sch Mat & Chem, State Key Lab Environm Friendly Energy Mat,Minist, Mianyang 621010, Sichuan, Peoples R China 2.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China 3.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China 4.Beijing Normal Univ, Ctr Adv Mat Res, Zhuhai 519087, Peoples R China 5.Beijing Normal Univ, Fac Arts & Sci, Zhuhai 519087, Peoples R China 6.Chinese Acad Sci, Shenzhen Inst Adv Technol, Inst Technol Carbon Neutral, Shenzhen 518055, Peoples R China 7.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cao, Yang,Li, Junfeng,Tang, Di,et al. Targeted Defect Repair and Multi-functional Interface Construction for the Direct Regeneration of Spent LiFePO₄ Cathodes[J]. ADVANCED MATERIALS,2024:11.
APA	Cao, Yang.,Li, Junfeng.,Tang, Di.,Zhou, Fei.,Yuan, Mengwei.,...&Zhou, Guangmin.(2024).Targeted Defect Repair and Multi-functional Interface Construction for the Direct Regeneration of Spent LiFePO₄ Cathodes.ADVANCED MATERIALS,11.
MLA	Cao, Yang,et al."Targeted Defect Repair and Multi-functional Interface Construction for the Direct Regeneration of Spent LiFePO₄ Cathodes".ADVANCED MATERIALS (2024):11.