Single-Phase Ternary Compounds with a Disordered Lattice and Liquid Metal Phase for High-Performance Li-Ion Battery Anodes  

作　　者：Yanhong Li Lei Zhang Hung-Yu Yen Yucun Zhou Gun Jang Songliu Yuan Jeng-Han Wang Peixun Xiong Meilin Liu Ho Seok Park Wenwu Li 

机构地区：[1]School of Chemical Engineering,Sungkyunkwan University,2066,Seobu-ro,Jangan-gu,Suwon-Si,Gyeonggi-Do 440-746,Korea [2]School of Physics,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China [3]School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA [4]Department of Chemistry,National Taiwan Normal University,Taipei 11677,Taiwan,People’s Republic of China [5]Samsung Advanced Institute for Health Sciences and Technology(SAIHST),Sungkyunkwan University,2066 Seoburo,Jangan-gu,Suwon 440-746,Korea [6]SKKU Advanced Institute of Nano Technology(SAINT),Sungkyunkwan University,2066 Seoburo,Jangan-gu,Suwon 440-746,Korea [7]SKKU Institute of Energy Science and Technology(SIEST),Sungkyunkwan University,2066 Seoburo,Jangan-gu,Suwon 440-746,Korea

出　　处：《Nano-Micro Letters》2023年第5期36-50,共15页纳微快报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.22178068);the Brain Pool(BP)program(No.2021H1D3A2A02045576)funded by National Research Foundation of Korea;National Research Foundation of Korea grant funded by the Korea government(MSIT)(No.NRF-2020R1A3B2079803 and No.2021M3D1A2043791)。

摘　　要：Si is considered as the promising anode materials for lithium-ion batteries(LIBs)owing to their high capacities of 4200 mAh g-1and natural abundancy.However,severe electrode pulverization and poor electronic and Li-ionic conductivities hinder their practical applications.To resolve the afore-mentioned problems,we first demonstrate a cation-mixed disordered lattice and unique Li storage mechanism of single-phase ternary GaSiP_(2)compound,where the liquid metallic Ga and highly reactive P are incorporated into Si through a ball milling method.As confirmed by experimental and theoretical analyses,the introduced Ga and P enables to achieve the stronger resistance against volume variation and metallic conductivity,respectively,while the cation-mixed lattice provides the faster Li-ionic diffusion capability than those of the parent GaP and Si phases.The resulting GaSiP_(2)electrodes delivered the high specific capacity of 1615 mAh g-1and high initial Coulombic efficiency of 91%,while the graphite-modified GaSiP_(2)(GaSiP_(2)@C)achieved 83%of capacity retention after 900 cycles and high-rate capacity of 800 at 10,000 mA g-1.Furthermore,the LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)//Ga SiP_(2)@C full cells achieved the high specific capacity of 1049 mAh g-1after 100 cycles,paving a way for the rational design of high-performance LIB anode materials.

关 键 词：Multinary compounds Liquid metal GaSiP_(2) Disordered lattice Li-ion batteries 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]