Facilitating prelithiation of silicon carbon anode by localized high-concentration electrolyte for high-rate and long-cycle lithium storage

作     者：Yuanxing Zhang Borong Wu Jiaying Bi Xinyu Zhang Daobin Mu Xin-Yu Zhang Ling Zhang Yao Xiao Feng Wu 

作者机构：School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina Chongqing Innovation CenterBeijing Institute of TechnologyChongqingChina College of New EnergyXi′an Shiyou UniversityXi′anChina Institute for Carbon NeutralizationCollege of Chemistry and Materials EngineeringWenzhou UniversityWenzhouChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)Nankai UniversityTianjinChina 

出 版 物：《Carbon Energy》 (碳能源（英文）)

年 卷 期：2024年第6卷第6期

页      面：216-233页

核心收录：

学科分类：080603[工学-有色金属冶金] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 070203[理学-原子与分子物理] 0202[经济学-应用经济学] 1202[管理学-工商管理] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 0703[理学-化学] 0714[理学-统计学（可授理学、经济学学位）] 0701[理学-数学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China,Grant/Award Number:22179006 Natural Science Foundation of Zhejiang Province,Grant/Award Number:LQ23E020002 National Natural Science Foundation of China,Grant/Award Numbers:52202284,52072036 Cooperation between Industry and Education Project of Ministry of Education,Grant/Award Number:220601318235513 WenZhou Natural Science Foundation,Grant/Award Numbers:G20220019,G20220021 State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Grant/Award Number:EIPE22208 Key Research and Development Program of Henan province,China,Grant/Award Number:231111242500 

主　　题：localized high-concentration electrolytes prelithiation SEI layer silicon anode 

摘      要：The commercialization of silicon-based anodes is affected by their low initial Coulombic efficiency(ICE)and capacity decay,which are attributed to the formation of an unstable solid electrolyte interface(SEI)***,a feasible and cost-effective prelithiation method under a localized highconcentration electrolyte system(LHCE)for the silicon-silica/graphite(Si-SiO_(2)/C@G)anode is designed for stabilizing the SEI layer and enhancing the *** thin SiO_(2)/C layers with-NH_(2) groups covered on nano-Si surfaces are demonstrated to be beneficial to the prelithiation process by density functional theory calculations and electrochemical *** SEI formed under LHCE is proven to be rich in ionic conductivity,inorganic substances,and flexible organic ***,faster Li+transportation across the SEI further enhances the prelithiation effect and the rate performance of Si-SiO_(2)/C@G *** also leads to uniform decomposition and high stability of the SEI with abundant organic *** a result,the prepared anode shows a high reversible specific capacity of 937.5 mAh g^(-1)after 400 cycles at a current density of 1 *** 811‖Li-SSGLHCE full cell achieves a high-capacity retention of 126.15 mAh g^(-1)at 1 C over 750 cycles with 84.82%ICE,indicating the great value of this strategy for Si-based anodes in large-scale applications.