Si-Based High-Entropy Anode for Lithium-Ion Batteries

doi:10.1002/smtd.202300754

IMR OpenIR

	Si-Based High-Entropy Anode for Lithium-Ion Batteries
	Lei, Xincheng 1,2; Wang, Yingying 1; Wang, Jiayi 1; Su, Yi 3,4; Ji, Pengxiang 1,2; Liu, Xiaozhi 1; Guo, Shengnan 1; Wang, Xuefeng 1; Hu, Qingmiao 7; Gu, Lin 5,6; Zhang, Yuegang 3,4; Yang, Rui 7; Zhou, Gang 7; Su, Dong 1
通讯作者	Wang, Yingying(wangyingying@issp.ac.cn) ; Zhou, Gang(gzhou@imr.ac.cn) ; Su, Dong(dongsu@iphy.ac.cn)
	2023-10-11
发表期刊	SMALL METHODS
ISSN	2366-9608
页码	10
摘要	Up to now, only a small portion of Si has been utilized in the anode for commercial lithium-ion batteries (LIBs) despite its high energy density. The main challenge of using micron-sized Si anode is the particle crack and pulverization due to the volume expansion during cycling. This work proposes a type of Si-based high-entropy alloy (HEA) materials with high structural stability for the LIB anode. Micron-sized HEA-Si anode can deliver a capacity of 971 mAhg-1 and retains 93.5% of its capacity after 100 cycles. In contrast, the silicon-germanium anode only retains 15% of its capacity after 20 cycles. This study has discovered that including HEA elements in Si-based anode can decrease its anisotropic stress and consequently enhance ductility at discharged state. By utilizing in situ X-ray diffraction and transmission electron microscopy analyses, a high-entropy transition metal doped Lix(Si/Ge) phase is found at lithiated anode, which returns to the pristine HEA phase after delithiation. The reversible lithiation and delithiation process between the HEA phases leads to intrinsic stability during cycling. These findings suggest that incorporating high-entropy modification is a promising approach in designing anode materials toward high-energy density LIBs. High-entropy strategy is applied to Si-based anode materials simply by ball milling Si/Ge with multiple 3d transition metal elements. Benefiting from the high-entropy effect, reversible structure change during cycling is found in the high-entropy system which leads to its cycling stability. Also, transition metal elements inside lithiated particle increase its ductility and thus relieve the stress at discharged state.image
关键词	high entropy effect Li ion batteries mechanical properties Si anodes structural integrity
资助者	X.L. and Y.W. contributed equally to this work. The authors acknowledge the funding support from the National Key Research and Development Program of China (No. 2020YFB2007400), the National Natural Science Foundation of China (No. 22209202, 22075317), and ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; National Super-computing Center in Zhengzhou
DOI	10.1002/smtd.202300754
收录类别	SCI
语种	英语
资助项目	X.L. and Y.W. contributed equally to this work. The authors acknowledge the funding support from the National Key Research and Development Program of China (No. 2020YFB2007400), the National Natural Science Foundation of China (No. 22209202, 22075317), and[2020YFB2007400] ; National Key Research and Development Program of China[22209202] ; National Key Research and Development Program of China[22075317] ; National Key Research and Development Program of China[XDB33030200] ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; National Super-computing Center in Zhengzhou
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:001079000000001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：20[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/321006/179395
专题	中国科学院金属研究所
通讯作者	Wang, Yingying; Zhou, Gang; Su, Dong
作者单位	1.Chinese Acad Sci, Inst Phys, Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 3.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China 4.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 5.Tsinghua Univ, Beijing Natl Ctr Electron Microscopy, Dept Mat Sci & Engn, Beijing 100084, Peoples R China 6.Tsinghua Univ, Dept Mat Sci & Engn, Lab Adv Mat, Beijing 100084, Peoples R China 7.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Lei, Xincheng,Wang, Yingying,Wang, Jiayi,et al. Si-Based High-Entropy Anode for Lithium-Ion Batteries[J]. SMALL METHODS,2023:10.
APA	Lei, Xincheng.,Wang, Yingying.,Wang, Jiayi.,Su, Yi.,Ji, Pengxiang.,...&Su, Dong.(2023).Si-Based High-Entropy Anode for Lithium-Ion Batteries.SMALL METHODS,10.
MLA	Lei, Xincheng,et al."Si-Based High-Entropy Anode for Lithium-Ion Batteries".SMALL METHODS (2023):10.