Open AccessFunctionalized 12 µm Polyethylene Separator to Realize Dendrite‐Free Lithium Deposition toward Highly Stable Lithium‐Metal Batteries
Author(s) -
Zhao Qiannan,
Wang Ronghua,
Hu Xiaolin,
Wang Yumei,
Lu Guanjie,
Yang Zuguang,
Liu Qiwen,
Yang Xiukang,
Pan Fusheng,
Xu Chaohe
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202102215
Subject(s) - faraday efficiency , anode , separator (oil production) , materials science , composite number , coating , chemical engineering , lithium vanadium phosphate battery , current collector , composite material , nanotechnology , electrode , chemistry , physics , thermodynamics , engineering , electrolyte
Direct application of metallic lithium (Li) as the anode in rechargeable lithium metal batteries (LMBs) is still hindered by some annoying issues such as lithium dendrites formation, low Coulombic efficiency, and safety concerns arising therefrom. Herein, an advanced composite separator is prepared by facilely blade coating lightweight and thin functional layers on commercial 12 µm polyethylene separator to stabilize the Li anode. The composite separator simultaneously improves the Li ion transport and lithium deposition behaviors with uniform lithium ion distribution properties, enabling the dendrite‐free Li deposition. As a result, the lithium anode can stably cycle up to 3000 cycles with the high capacity of 3.5 mAh cm −2 . Moreover, the composite separator exhibits wide compatibility in LMBs (Li–S and Li‐ion battery) and delivers stable cycling performance and high Coulombic efficiency both in coin and lab‐level soft‐pack cells. Thus, this cost‐effective modification strategy exhibits great application potential in high‐energy LMBs.