中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 金属研究所
  3. 中国科学院金属研究所
Si-Based High-Entropy Anode for Lithium-Ion Batteries

文献类型：期刊论文

作者Lei, Xincheng2,3; Wang, Yingying2; Wang, Jiayi2; Su, Yi4,5; Ji, Pengxiang2,3; Liu, Xiaozhi2; Guo, Shengnan2; Wang, Xuefeng2; Hu, Qingmiao1; Gu, Lin6,7
刊名SMALL METHODS
出版日期2023-10-11
页码10
关键词high entropy effect Li ion batteries mechanical properties Si anodes structural integrity
ISSN号2366-9608
DOI10.1002/smtd.202300754
通讯作者Wang, Yingying(wangyingying@issp.ac.cn) ; Zhou, Gang(gzhou@imr.ac.cn) ; Su, Dong(dongsu@iphy.ac.cn)
英文摘要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
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
语种英语
WOS记录号WOS:001079000000001
出版者WILEY-V C H VERLAG GMBH
资助机构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
源URL[http://ir.imr.ac.cn/handle/321006/179394]  
专题金属研究所_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, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Phys, Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
5.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
6.Tsinghua Univ, Beijing Natl Ctr Electron Microscopy, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
7.Tsinghua Univ, Dept Mat Sci & Engn, Lab Adv Mat, Beijing 100084, 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.

入库方式： OAI收割

来源：金属研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。