Cationic Covalent Organic Framework Nanosheets for Fast Li-Ion Conduction

被引：433

作者：

Chen, Hongwei ^{[1
]}

Tu, Hangyu ^{[1
]}

Hu, Chenji ^{[2
]}

Liu, Yi ^{[3
]}

Dong, Derui ^{[1
]}

Sun, Yufei ^{[1
]}

Dai, Yafei ^{[3
]}

Wang, Senlin ^{[1
]}

Qian, Hao ^{[1
]}

Lin, Zhiyong ^{[1
]}

Chen, Liwei ^{[2
]}

机构：

[1] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen 361021, Peoples R China

[2] Chinese Acad Sci, I Lab, CAS Ctr Excellence Nanosci, Suzhou Inst Nanotech & Nanobion SINANO, Suzhou 215123, Peoples R China

[3] Nanjing Normal Univ, Sch Phys Sci & Technol, Jiangsu Key Lab Optoelect Technol, Nanjing 210023, Jiangsu, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2018年 / 140卷 / 03期

基金：

中国国家自然科学基金;

关键词：

POLYMER ELECTROLYTES; BATTERIES; STABILITY;

D O I：

10.1021/jacs.7b12292

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Covalent organic frameworks (COFs) with their porous structures that are accommodative of Li salts are considered to be potential candidates for solid-state fast Li+ conductors. However, Li salts simply infiltrated in the pores of solid-state COTS tend:to be present in closely associate. ion;pairs, resulting in slow ionic diffusion dynamics. Here we incorporate cationic skeleton into the COF structure to split the Li salt ion pair through stronger, dielectric, screening. It is observed that the concentration of free Li+ ions in the resulting material is drastically increased, leading to a significantly improved Li+ conductivity in the absence of any solvent (up to 2.09 X 10(-4) S cm(-1) at 70 degrees C).

引用

页码：896 / 899

页数：4

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