Li-Ca Alloy Composite Anode with Ant-Nest-Like Lithiophilic Channels in Carbon Cloth Enabling High-Performance Li Metal Batteries

作     者：Zihao Wang Yuchi Liu Jianxiong Xing Zhicui Song Aijun Zhou Wei Zou Fu Zhou Jingze Li 

作者机构：School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou)University of Electronic Science and Technology of ChinaHuzhou 313001China Research and Development CenterTianqi Lithium Co.Ltd.Chengdu 610093China 

出 版 物：《Research》 (研究（英文）)

年 卷 期：2022年第2022卷第3期

页      面：343-353页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the National Natural Science Foundation of China(Nos.21673033 and 52172184) the Suining Science and Technology Program(2019ZDCGZH003) the Fundamental Research Funds for the Central Universities(ZYGX2019J024) 

主　　题：alloy intermetallic composite 

摘      要：Constructing a three-dimensional(3D)multifunctional hosting architecture and subsequent thermal infusion of molten Li to produce advanced Li composite is an effective strategy for stable Li metal ***,the pure liquid Li is difficult to spread across the surface of various substrates due to its large surface tension and poor wettability,hindering the production and application of Li composite ***,heteroatomic Ca is doped into molten Li to generate Li-Ca alloy,which greatly regulates the surface tension of the molten alloy and improves the wettability against carbon cloth(CC).Moreover,a secondary network composed of CaLi2 intermetallic compound with interconnected ant-nest-like lithiophilic channels is in situ formed and across the primary scaffold of CC matrix by infiltrating molten Li-Ca alloy into CC and then cooling treatment(LCAC),which has a larger and lithiophilic surface to enable uniform Li deposition into interior space of the hybrid scaffold without Li ***,LCAC exhibits a long-term lifespan for 1100 h under a current density of 5 mA cm^(-2)with fixed areal capacity of 5 mAh cm^(-2).Remarkably,full cells paired with practical-level LiFePO4 cathode of 2.45 mAh cm^(-2)deliver superior performance.