A multi-kernel-shell indium selenide@carbon nanosphere enabling high-performance lithium-ion batteries  

作　　者：Sihao Wang Zhuoming Jia Ying Zhao Yanhong Li Xianglong Kong Yongde Yan Fei He Milin Zhang Linzhi Wu Piaoping Yang Wenwu Li Meilin Liu Zhiliang Liu 

机构地区：[1]College of Material Sciences and Chemical Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China [2]School of Materials Science&Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA [3]School of Chemical Engineering,Sungkyunkwan University 2066,Seobu-ro,Jangan-gu,Suwon 440-746,Republic of Korea [4]College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China

出　　处：《Journal of Energy Chemistry》2024年第9期698-708,共11页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(22101065 and 51972075);the Heilongjiang Provincial Natural Science Foundation of China(YQ2021B001);the Project funded by China Postdoctoral Science Foundation(2023T160153 and 2020M681075);the Fundamental Research Funds for the Central Universities.

摘　　要：Indium selenide has garnered significant attention for high volumetric capacities,but is currently plagued by the sluggish charge transfer kinetics,severe volume effect,and rapid capacity degradation that hinder their practical applications.Herein,we design,synthesize,and characterize a multi-kernel-shell structure comprised of indium selenide encapsulated within carbon nanospheres(referred to as m-K-S In_(2)Se_(3)@C)through an integrated approach involving a hydrothermal method followed by a gaseous selenization process.Importantly,experimental measurements and density functional theory calculations confirm that the m-K-S In_(2)Se_(3)@C not only improve the adsorption capability for Li-ions but also lower the energy barrier for Li-ions diffusion.Profiting from numerous contact points,shorter diffusion distances and an improved volume buffering effect,the m-K-S In_(2)Se_(3)@C achieves an 800 mA h g^(−1)capacity over 1000 loops at 1000 mA g^(−1),a 520 mA h g^(−1)capacity at 5000 mA g^(−1)and an energy density of 270 Wh kg^(−1)when coupled with LiFePO4,surpassing most related anodes reported before.Broadly,the m-K-S structure with unique nano-micro structure offers a new approach to the design of advanced anodes for LIBs.

关 键 词：Multi-kernel-shell structure In_(2)Se_(3) ANODE Li-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]