2.5μm-Thick Ultrastrong Asymmetric Separator for Stable Lithium Metal Batteries  

作　　者：Donghao Xie Zekun Wang Xin Ma Yuchen Feng Xiaomin Tang Qiao Gu Yonghong Deng Ping Gao 

机构地区：[1]Advanced Materials Thrust,Interdisciplinary Office,The Hong Kong University of Science and Technology,Clear Water Bay,Hong Kong,999077 China [2]Department of Chemical and Biological Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Hong Kong 999077,China [3]Advanced Materials Thrust,Function Hub,The Hong Kong University of Science and Technology(Guangzhou),Nansha District,Guangzhou 511453,China [4]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Energy & Environmental Materials》2024年第6期106-117,共12页能源与环境材料（英文）

基　　金：financial support from the Guangzhou Municipal Government.

摘　　要：Lithium metal batteries(LMBs)are considered the ideal choice for high volumetric energy density lithium-ion batteries,but uncontrolled lithium deposition poses a significant challenge to the stability of such devices.In this paper,we introduce a 2.5μm-thick asymmetric and ultrastrong separator,which can induce tissue-like lithium deposits.The asymmetric separator,denoted by utPE@Cu_(2)O,was prepared by selective synthesis of Cu_(2)O nanoparticles on one of the outer surfaces of a nanofibrous(diameter~10 nm)ultrastrong ultrahigh molecular weight polyethylene(UHMWPE)membrane.Microscopic analysis shows that the lithium deposits have tissue-like morphology,resulting in the symmetric lithium cells assembled using utPE@Cu_(2)O with symmetric Cu_(2)O coating exhibiting stable performance for over 2000 h of cycling.This work demonstrates the feasibility of a facile approach ultrathin separators for the deployment of lithium metal batteries,providing a pathway towards enhanced battery performance and safety.

关 键 词：in situ SEI lithium deposition regulation SEPARATOR ultrastrong ULTRATHIN 

分 类 号：TM912[电气工程—电力电子与电力传动]