Ionic covalent organic frameworks-based electrolyte enables fast Na-ion diffusion towards quasi-solid-state sodium batteries

被引：0

作者：

Kang, Tianxing ^{[1
]}

Liu, Haoyuan ^{[2
]}

Cai, Jian ^{[2
]}

Feng, Xingyi ^{[1
]}

Tong, Zhongqiu ^{[3
]}

Zou, Hanbo ^{[1
]}

Yang, Wei ^{[1
]}

Nan, Junmin ^{[2
]}

Chen, Shengzhou ^{[1
]}

机构：

[1] Guangzhou Univ, Inst Energy & Catalysis, Sch Chem & Chem Engn, Guangzhou 510006, Peoples R China

[2] South China Normal Univ, Sch Chem, Guangzhou 510700, Peoples R China

[3] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2025年 / 77卷

基金：

中国博士后科学基金;

关键词：

Covalent organic frameworks; Quasi-solid-state electrolyte; Fast Na-ion diffusion; Sodium metal batteries; LI;

D O I：

10.1016/j.ensm.2025.104192

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solid-state sodium batteries present a high potential for future energy technology due to their high safety and energy density. However, sluggish Na+ transportation of solid-state electrolytes and serious Na dendrites hinder their further development. Herein, we propose a negatively charged-modified covalent organic framework (COF) with -SO3Na as a Na-ion quasi-solid-state electrolyte (QSSE-COF-SO3Na) for the first time to enhance the Na+ transportation. Density functional theory calculations and molecular dynamics simulations prove that the nanoscale ion channels of the COF-SO3Na and the interaction between the -SO3- and the anion PF6- effectively enhance the Na+ diffusion kinetics. The QSSE-COF-SO3Na exhibits a high ionic conductivity of 4.1 x 10-4 S cm-1 at room temperature and a high transference number of 0.89. Particularly, Na|QSSE-COF-SO3Na|Na symmetric cells show a stable Na plating/stripping process without Na dendrites over 1000 h and 800 h at 0.05 and 0.2 mA cm-2, respectively. Additionally, the QSSE-COF-SO3Na supports full cells, which respectively use NaTi2(PO4)3, Na3V2(PO4)3, and NaFePO4 as cathodes, to display good cycling stability and rate performance. This work highlights the novel strategy to develop the Na-ion quasi-solid-state devices.

引用

页数：8

共 52 条

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