Fast interfacial kinetics derived from bicontinuous three-dimensional(3D)architecture is a strategic fea-ture 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(Ni3Sn4)sup-ported by 3D Nickel scaffolds as main frame because the Ni3Sn4 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 Ni3Sn4 during the lithiation process.Our findings are that Ni enables Ni3Sn4 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 Ni3Sn4 and provides a new per-spective for the design of high-capacity and high-power 3D anodes for fast-charging LIBs.

Janghyuk Moon;Trung Dinh Hoang;Seong Soo Park;Seowan Park;Dong Young Rhee;Junwon Lee;Sang A Han;Min-Sik Park;Jung Ho Kim

School of Energy Systems Engineering Chung-Ang University,Heukseok-Ro,Dongjak-gu,Seoul 06974,Republic of Korea;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;Institute for Superconducting&Electronic Materials(ISEM),Australian Institute of Innovative Materials(AIIM),University of Wollongong Innovation Campus,Squires Way,North Wollongong,NSW 2500,Australia

能源化学

[1]Janghyuk Moon;Trung Dinh Hoang;Seong Soo Park;Seowan Park;Dong Young Rhee;Junwon Lee;Sang A Han;Min-Sik Park;Jung Ho Kim-.Intrinsic electrochemical activity of Ni in Ni3Sn4 anode accommodating high capacity and mechanical stability for fast-charging lithium-ion batteries)[J].能源化学,2022(08):470-477

bicontinuous

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