In-situ encapsulating flame-retardant phosphate into robust polymer matrix for safe and stable lithium metal batteries

被引：142

作者：

Tan, Shuang-Jie ^{[1
,2
]}

Yue, Junpei ^{[1
]}

Tian, Yi-Fan ^{[1
,2
]}

Ma, Qiang ^{[1
]}

Wan, Jing ^{[1
,2
]}

Xiao, Yao ^{[1
]}

Zhang, Juan ^{[1
,2
]}

Yin, Ya-Xia ^{[1
,2
]}

Wen, Rui ^{[1
,2
]}

Xin, Sen ^{[1
,2
]}

Guo, Yu-Guo ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol,Beijing, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2021年 / 39卷

基金：

中国博士后科学基金; 中国国家自然科学基金; 国家重点研发计划;

关键词：

lithium-metal batteries; flame-retardant electrolyte; in-situ solidification; polycarbonate; organophosphate; DENDRITE GROWTH; LI-ION; ELECTROLYTES; PROGRESS; CONDUCTIVITY; TRANSPORT; ANODE;

D O I：

10.1016/j.ensm.2021.04.020

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-liquid hybrid electrolytes (SLHEs) are promising electrolyte candidates for Li-metal batteries. However, most of the components of SLHE are flammable, posing safety risks. Here, a non-flammable SLHE was proposed by in-situ encapsulating a flame-retardant liquid phosphate into a robust solid polycarbonate matrix. The in-situ solidified SLHE simultaneously features high Li+ conductivity (4.4 mS cm(-1)), Young's modulus (12.4 GPa), Li+ transference number (0.76) and a wide electrochemical window (0-4.9 V vs. Li+/Li), which help to effectively suppress dendrites and unfavorable side reactions at the anode and provide compatibility with the high-voltage cathode. By employing non-flammable SLHE, a prototype Li parallel to LiNi0.8Co0.1Mn0.1O2 cell retains 87.7% of the initial capacity after 200 cycles, and the Ah level Li parallel to LiNi0.8Co0.1Mn0.1O2 pouch cells showed enhanced safety by passing the nail test by authorized third parties. This study inspires the optimal design of SLHEs towards practical realization of safe and stable Li-metal batteries.

引用

页码：186 / 193

页数：8

共 51 条

[21] Carbon materials with hierarchical porosity: Effect of template removal strategy and study on their electrochemical properties [J].