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Intrinsic electrochemical activity of Ni in Ni_(3)Sn_(4) anode accommodating high capacity and mechanical stability for fast-charging lithium-ion batteries

查看全文 作　　者：Janghyuk [1]Moon;Trung Dinh [1]Hoang;Seong Soo [1]Park;Seowan [1]Park;Dong Young [2]Rhee;Junwon [2]Lee;Sang A [3]Han;Min-Sik [2]Park;Jung Ho [3]Kim 高影响力作者 机构地区：[1]School of Energy Systems Engineering,Chung-Ang University,Heukseok-Ro,Dongjak-gu,Seoul 06974,Republic of Korea;[2]Department of Advanced Materials Engineering for Information and Electronics,Integrated Education Institute for Frontier Science&Technology(BK21 Four),Kyung Hee University,1732 Deogyeong-daero,Giheung-gu,Yongin 17104,Republic of Korea;[3]Institute for Superconducting&Electronic Materials(ISEM),Australian Institute of Innovative Materials(AIIM),University of Wollongong,Innovation Campus,Squires Way,North Wollongong,NSW 2500,Australia高影响力机构 出　　处：《Journal of Energy Chemistry》索引2022年第31卷第8期,共9页高影响力期刊 基　　金：supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(NRF-2021M3H4A1A02045967)(NRF-2021M3H4A1A02048137);supported by the Chung-Ang University Research Scholarship Grants in 2021。 摘　　要：Fast interfacial kinetics derived from bicontinuous three-dimensional(3D)architecture is a strategic feature for achieving fast-charging lithium-ion batteries(LIBs).One of the main reasons is its large active surface and short diffusion path.Yet,understanding of unusual electrochemical properties still remain great challenge due to its complexity.In this study,we proposed a nickel–tin compound(Ni_(3)Sn_(4))supported by 3D Nickel scaffolds as main frame because the Ni_(3)Sn_(4) clearly offers a higher reversible capacity and stable cycling performance than bare tin(Sn).In order to verify the role of Ni,atomic-scale simulation based on density functional theory systematically addressed to the reaction mechanism and structural evolution of Ni_(3)Sn_(4) during the lithiation process.Our findings are that Ni enables Ni_(3)Sn_(4) to possess higher mechanical stability in terms of reactive flow stress,subsequently lead to improve Li storage capability.This study elucidates an understanding of the lithiation mechanism of Ni_(3)Sn_(4) and provides a new perspective for the design of high-capacity and high-power 3D anodes for fast-charging LIBs. 关 键 词：Lithium-ion batteries Ni_(3)Sn_(4) High-capacity anode 3D-structured electrode Inverse opal structure Density functional theory
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