Functional lithiophilic skeleton/evolving lithium sulfide artificial protective layer for dendrite-free Li metal anode

被引：11

作者：

Sun, Chenyi ^{[1
]}

Gao, Li ^{[1
]}

Rong, Wanling ^{[1
]}

Kang, Rongkai ^{[1
]}

Yang, Yusen ^{[1
]}

Li, Jiachang ^{[1
]}

Bai, Yanwen ^{[1
]}

Tian, Xuelei ^{[1
]}

Bian, Xiufang ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 479卷

基金：

中国国家自然科学基金;

关键词：

Li metal anode; Functional skeleton; Artificial protective layer; Dendrite-free deposition; STRATEGIES; BATTERIES; CARBON; ION;

D O I：

10.1016/j.cej.2023.147821

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The intrinsic high activity and skeletonless development of lithium (Li) metal have resulted in gruesome security issues, limiting the widespread use of Li metal anodes. Herein, a three-dimensional (3D) nanosheet skeleton with CuO/CuS (3D CuO/CuS-NS skeleton) is designed as the functional Li metal anode current collector. The func-tional skeleton's 3D structure features a large specific surface area to reduce the local current density and inhibit dendrite growth. CuO/CuS loaded by the skeleton can be employed as lithiophilic sites to direct the uniform deposition of Li metal, according to density functional theory (DFT). Furthermore, during the first deposition, CuO/CuS can interact with Li metal to produce Li2O/Li2S, in which Li2S can act as an artificial protective layer to effectively improve the cycle stability of the cells. The dendrite-free deposition in the depositional process demonstrates that the 3D CuO/CuS-NS skeleton can achieve excellent Li metal anode stability. The Li metal anodes with 3D CuO/CuS-NS skeletons also exhibit outstanding electrochemical stability over 1000 h of long-term cycling. In full cells assembled with commercial LiCoO2 cathodes, the 3D CuO/CuS-NS skeletons exhibit good rate performance and capacity retention performance.

引用

页数：10

共 77 条

[1] One-Step, Vacuum-Assisted Construction of Micrometer-Sized Nanoporous Silicon Confined by Uniform Two-Dimensional N-Doped Carbon toward Advanced Li Ion and MXene-Based Li Metal Batteries [J].