Open AccessLithiophilic Cu‐Li 2 O matrix on a Cu Collector to Stabilize Lithium Deposition for Lithium Metal Batteries
Author(s) -
Gong Zhe,
Lian Cheng,
Wang Pengfei,
Huang Kai,
Zhu Kai,
Ye Ke,
Yan Jun,
Wang Guiling,
Cao Dianxue
Publication year - 2022
Publication title -
energy and environmental materials
Language(s) - English
Resource type - Journals
ISSN - 2575-0356
DOI - 10.1002/eem2.12243
Subject(s) - faraday efficiency , anode , materials science , lithium (medication) , current collector , nucleation , electrolyte , stripping (fiber) , lithium metal , plating (geology) , foil method , electrode , chemical engineering , matrix (chemical analysis) , deposition (geology) , metal , composite material , chemistry , metallurgy , medicine , organic chemistry , engineering , geophysics , geology , endocrinology , paleontology , sediment , biology
Lithium metal anode is the most ideal candidate for next‐generation energy storage system. However, the uncontrolled dendrite growth, infinite volume expansion, and undesired side reactions lead to serious safety issues and hinder their potential application. Herein, a pre‐lithiation strategy is proposed to construct a high‐lithiophilic Cu‐Li 2 O matrix on commercial Cu foil. The in situ‐generated Li 2 O promises adequate nucleation sites and strengthens solid electrolyte interphase and lateral lithium deposition. Meanwhile, the existence of 3D matrix reduces the local current density. The synergy effect of Li 2 O and Cu suppresses the growth of lithium dendrites. As a result, Cu‐Li 2 O matrix reveals an enhanced lithium plating/stripping behavior with Coulombic efficiency of 98.46% after 270 cycles. The symmetrical cell assembled by Li‐plated electrodes displays a prolonged lifespan of 1400 h. The work demonstrates a scalable and effective approach for modified current collectors toward stable Li metal anode.