期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-11361-z
关键词
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资金
- KAIST
- Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2009-0082580]
- National Research Foundation of Korea (NRF) - Korean government (MSIP
- Ministry of Science, ICT & Future Planning) [NRF-2018R1C1B6002624, NRF-2018M3A7B4065625]
- National Research Council of Science and Technology (NST) grant by the Korean government (MSIP) [CAP-17-04-KRISS]
- Korea Institute of Science and Technology institutional programs [2E29400, 2E28990]
- KISTI Supercomputing Centers [KSC-2018-S1-0018]
- Energy Technology Development Project (KETEP) - Ministry of Trade, Industry and Energy, Republic of Korea [2018201010636 A]
- NRF - Korean government (MSIP
- Ministry of Science, ICT & Future Planning) [NRF-2018H1A2A1060105]
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.
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