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

Xie, Donghao1,3; Wang, Zekun2; Ma, Xin1,3; Feng, Yuchen1,3; Tang, Xiaomin2; Gu, Qiao2; Deng, Yonghong4; Gao, Ping2,3

2024-05-01

10.1002/eem2.12746

ENERGY & ENVIRONMENTAL MATERIALS   影响因子和分区

2575-0356

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 2.5 mu m-thick asymmetric and ultrastrong separator, which can induce tissue-like lithium deposits. The asymmetric separator, denoted by utPE@Cu2O, was prepared by selective synthesis of Cu2O nanoparticles on one of the outer surfaces of a nanofibrous (diameter similar to 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@Cu2O with symmetric Cu2O 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.

in situ SEI lithium deposition regulation separator ultrastrong ultrathin

SCI ; EI

英语

通讯

Materials Science

Materials Science, Multidisciplinary

WOS:001218366300001

WILEY

Web of Science

1.Hong Kong Univ Sci & Technol, Adv Mat Thrust, Interdisciplinary Off, Clear Water Bay, Hong Kong 999077, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Clear Water Bay, Hong Kong 999077, Peoples R China
3.Hong Kong Univ Sci & Technol Guangzhou, Adv Mat Thrust, Funct Hub, Guangzhou 511453, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Xie, Donghao,Wang, Zekun,Ma, Xin,et al. 2.5 μm-Thick Ultrastrong Asymmetric Separator for Stable Lithium Metal Batteries[J]. ENERGY & ENVIRONMENTAL MATERIALS,2024.

Xie, Donghao.,Wang, Zekun.,Ma, Xin.,Feng, Yuchen.,Tang, Xiaomin.,...&Gao, Ping.(2024).2.5 μm-Thick Ultrastrong Asymmetric Separator for Stable Lithium Metal Batteries.ENERGY & ENVIRONMENTAL MATERIALS.

Xie, Donghao,et al."2.5 μm-Thick Ultrastrong Asymmetric Separator for Stable Lithium Metal Batteries".ENERGY & ENVIRONMENTAL MATERIALS (2024).