@article{e5c2ae18d16f426da67c0bf5aed12299,
title = "Strong stress-composition coupling in lithium alloy nanoparticles",
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.",
author = "Seo, {Hyeon Kook} and Park, {Jae Yeol} and Chang, {Joon Ha} and Dae, {Kyun Sung} and Noh, {Myoung Sub} and Kim, {Sung Soo} and Kang, {Chong Yun} and Kejie Zhao and Sangtae Kim and Yuk, {Jong Min}",
note = "Funding Information: H.K.S., J.Y.P., and J.H.C. thank M.-J.W. in XRD Lab of KAIST Analysis Center for Research Advancement (KARA) for technical support with in situ SAXS experiments. This work was conducted as part of the KAIST-funded Global Singularity Research Program for 2019 and supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2009-0082580), which provided support for TEM analyses and sample preparation; a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) (NRF-2018R1C1B6002624), which provided support for graphene growth and TEM sample preparation; and a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) (NRF-2018M3A7B4065625), which provided support for preparation of electrode materials and electrochemical measurement. S.K. and C.-Y.K. acknowledge support from a National Research Council of Science and Technology (NST) grant by the Korean government (MSIP) (No. CAP-17-04-KRISS); Korea Institute of Science and Technology institutional programs (2E29400, 2E28990); computational resources from KISTI Supercomputing Centers through KSC-2018-S1-0018; and a support from the Energy Technology Development Project (KETEP) grant funded by the Ministry of Trade, Industry and Energy, Republic of Korea (Project no. 2018201010636 A). J.Y.P. specially thanks the NRF funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) for scholarship support through the Global Ph.D. Fellowship Program (NRF-2018H1A2A1060105).",
year = "2019",
month = dec,
day = "1",
doi = "10.1038/s41467-019-11361-z",
language = "English",
volume = "10",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}