@article{Xie2024, 
author = {Donghao Xie and Zekun Wang and Xin Ma and Yuchen Feng and Xiaomin Tang and Qiao Gu and Yonghong Deng and Ping Gao},
title = {2.5 μm-Thick Ultrastrong Asymmetric Separator for Stable Lithium Metal Batteries},
year = {2024},
journal = {Energy & Environmental Materials},
volume = {7},
number = {6},
keywords = {in situ SEI, lithium deposition regulation, separator, ultrastrong, ultrathin},
url = {https://www.sciopen.com/article/10.1002/eem2.12746},
doi = {10.1002/eem2.12746},
abstract = {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 μm-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 ~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.}
}