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Structural Reversibility of Nanoscaled Sn Anodes

文献类型：期刊论文

作者Su, Yi1,2; Lei, Xincheng3; Han, Zhen3; Liu, Haowen1,2; Xiao, Jianhua1,2; Su, Yipeng1,2; Ren, Shuaiyang1,2; Lin, Yitao1,2; Hu, Qingmiao4; Yang, Rui4
刊名NANO LETTERS
出版日期2024-04-18
卷号24期号:17页码:5332-5341
关键词Sn nanoparticles in situ TEM phase transition structural reversibility vacancyremoval
ISSN号1530-6984
DOI10.1021/acs.nanolett.4c01183
通讯作者Zhou, Gang(gzhou@imr.ac.cn) ; Su, Dong(dongsu@iphy.ac.cn) ; Zhang, Yuegang(yuegang.zhang@tsinghua.edu.cn)
英文摘要Alloying-type anode materials provide high capacity for lithium-ion batteries; however, they suffer pulverization problems resulting from the volume change during cycling. Realizing the cycling reversibility of these anodes is therefore critical for sustaining their electrochemical performance. Here, we investigate the structural reversibility of Sn NPs during cycling at atomic-level resolution utilizing in situ high-resolution TEM. We observed a surprisingly near-perfect structural reversibility after a complete cycle. A three-step phase transition happens during lithiation, accompanied by the generation of a significant number of defects, grain boundaries, and up to 202% volume expansion. In subsequent delithiation, the volume, morphology, and crystallinity of the Sn NPs were restored to their initial state. Theoretical calculations show that compressive stress drives the removal of vacancies generated within the NPs during delithiation, therefore maintaining their intact morphology. This work demonstrates that removing vacancies during cycling can efficiently improve the structural reversibility of high-capacity anode materials.
资助项目National Natural Science Foundation of China[2022YFA1203400] ; National Natural Science Foundation of China[2020YFB2007400] ; National Key R&D Program of China[22150710516] ; National Key R&D Program of China[22209202] ; National Key R&D Program of China[22075317] ; National Key R&D Program of China[52101277] ; National Natural Science Foundation of China[XDB33030200] ; Beijing Innovation Center for Future Chips, Tsinghua University ; Chinese Academy of Sciences ; National Supercomputing Center in Zhengzhou
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:001240874700001
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundation of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; Beijing Innovation Center for Future Chips, Tsinghua University ; Chinese Academy of Sciences ; National Supercomputing Center in Zhengzhou
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Zhou, Gang; Su, Dong; Zhang, Yuegang
作者单位1.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Inst Phys, Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
5.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Su, Yi,Lei, Xincheng,Han, Zhen,et al. Structural Reversibility of Nanoscaled Sn Anodes[J]. NANO LETTERS,2024,24(17):5332-5341.
APA Su, Yi.,Lei, Xincheng.,Han, Zhen.,Liu, Haowen.,Xiao, Jianhua.,...&Zhang, Yuegang.(2024).Structural Reversibility of Nanoscaled Sn Anodes.NANO LETTERS,24(17),5332-5341.
MLA Su, Yi,et al."Structural Reversibility of Nanoscaled Sn Anodes".NANO LETTERS 24.17(2024):5332-5341.

入库方式： OAI收割

来源：金属研究所

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