Seo, Hyeon Kook Park, Jae Yeol Chang, Joon Ha Dae, Kyun Sung Noh, Myoung-Sub Kim, Sung-Soo Kang, Chong-Yun Zhao, Kejie Kim, Sangtae Yuk, Jong Min 2024-01-19T19:34:03Z 2024-01-19T19:34:03Z 2021-09-02 2019-07 2041-1723 https://pubs.kist.re.kr/handle/201004/119819 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. English Nature Publishing Group Strong stress-composition coupling in lithium alloy nanoparticles Article 10.1038/s41467-019-11361-z 1 Nature Communications, v.10 Nature Communications 10 Y scie scopus 000477952600013 2-s2.0-85070908042 Multidisciplinary Sciences Science & Technology - Other Topics Article IN-SITU TEM SILICON NANOPARTICLES NEGATIVE ELECTRODES LITHIATION ANODES DEGRADATION DEFORMATION EVOLUTION FRACTURE