Covalent Organic Framework with Multi-Cationic Molecular Chains for Gate Mechanism Controlled Superionic Conduction in All-Solid-State Batteries

被引：36

作者：

Gong, Wei ^{[1
]}

Ouyang, Yuan ^{[1
]}

Guo, Sijia ^{[1
]}

Xiao, Yingbo ^{[1
,2
]}

Zeng, Qinghan ^{[1
,2
]}

Li, Dixiong ^{[1
]}

Xie, Yufeng ^{[1
]}

Zhang, Qi ^{[1
]}

Huang, Shaoming ^{[1
,2
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou Key Lab Low Dimens Mat & Energy Storage, Guangzhou 510006, Peoples R China

[2] Synergy Innovat Inst GDUT, Heyuan 517000, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 25期

基金：

中国国家自然科学基金;

关键词：

Covalent Organic Framework; Ion Transport; Nano-Confined Copolymerization; Solid-State Battery; Solid-State Electrolyte; IONIC-CONDUCTIVITY; LITHIUM; POLYMER; ELECTROLYTES; TRANSPORT; TEMPERATURE; MEMBRANE;

D O I：

10.1002/anie.202302505

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Although solid-state batteries (SSBs) are high potential in achieving better safety and higher energy density, current solid-state electrolytes (SSEs) cannot fully satisfy the complicated requirements of SSBs. Herein, a covalent organic framework (COF) with multi-cationic molecular chains (COF-MCMC) was developed as an efficient SSE. The MCMCs chemically anchored on COF channels were generated by nano-confined copolymerization of cationic ionic liquid monomers, which can function as Li+ selective gates. The coulombic interaction between MCMCs and anions leads to easier dissociation of Li+ from coordinated states, and thus Li+ transport is accelerated. While the movement of anions is restrained due to the charge interaction, resulting in a high Li+ conductivity of 4.9x10(-4) S cm(-1) and Li+ transference number of 0.71 at 30 degrees C. The SSBs with COF-MCMC demonstrate an excellent specific energy density of 403.4 Wh kg(-1) with high cathode loading and limited Li metal source.

引用

页数：8