Strong stress-composition coupling in lithium alloy nanoparticles
- Title
- Strong stress-composition coupling in lithium alloy nanoparticles
- Author
- 김상태
- Keywords
- IN-SITU TEM; SILICON NANOPARTICLES; NEGATIVE ELECTRODES; LITHIATION; ANODES; DEGRADATION; DEFORMATION; EVOLUTION; FRACTURE
- Issue Date
- 2019-07
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v. 10, article no. 3428
- Abstract
- The stress inevitably imposed during electrochemical reactions is expected to fundamentally affect the electrochemistry, phase behavior and morphology of electrodes in service. Here, we show a strong stress-composition coupling in lithium binary alloys during the lithiation of tin-tin oxide core-shell nanoparticles. Using in situ graphene liquid cell electron microscopy imaging, we visualise the generation of a non-uniform composition field in the nanoparticles during lithiation. Stress models based on density functional theory calculations show that the composition gradient is proportional to the applied stress. Based on this coupling, we demonstrate that we can directionally control the lithium distribution by applying different stresses to lithium alloy materials. Our results provide insights into stress-lithium electrochemistry coupling at the nanoscale and suggest potential applications of lithium alloy nanoparticles.
- URI
- https://www.nature.com/articles/s41467-019-11361-zhttps://repository.hanyang.ac.kr/handle/20.500.11754/152063
- ISSN
- 2041-1723
- DOI
- 10.1038/s41467-019-11361-z
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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