A cross-linked gel polymer electrolyte employing cellulose acetate matrix and layered boron nitride filler prepared via in situ thermal polymerization

被引：67

作者：

Liu, Meng ^{[1
,2
]}

Zhang, Songtong ^{[2
]}

Li, Guangqi ^{[1
]}

Wang, Chong ^{[2
,3
]}

Li, Bin ^{[1
]}

Li, Meng ^{[2
]}

Wang, Yue ^{[2
]}

Ming, Hai ^{[2
]}

Wen, Yuehua ^{[2
]}

Qiu, Jingyi ^{[2
]}

Chen, Junhong ^{[1
]}

Zhao, Pengcheng ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Beijing Key Lab Adv Chem Energy Storage Technol &, Res Inst Chem Def, Beijing 100191, Peoples R China

[3] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2021年 / 484卷

基金：

中国国家自然科学基金;

关键词：

Polymer electrolyte; In situ; Cellulose acetate; Filler; Intermolecular interaction; HIGH-PERFORMANCE; METAL BATTERIES; MEMBRANE; COMPOSITE; CELLS;

D O I：

10.1016/j.jpowsour.2020.229235

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：

The cross-linked gel polymer electrolyte (GPE) with cellulose acetate (CA) as matrix, poly (ethylene glycol) diacrylate (PEGDA) as cross-linking agent, and layered boron nitride (BN) as reinforcement is prepared for lithium-ion batteries (LIBs). Different from reported CA based polymer electrolytes, we adopt a simple in situ thermal polymerization method in the battery to prepare the GPE and polymer LIBs simultaneously. BN filler is uniformly dispersed in the cross-linked GPE and it interacts with not only the polymer matrix but also the anion in liquid electrolyte. Therefore, BN filler facilitates the transport of Li+ ions and delays the oxidative decomposition of the GPE. BN filler inhibits the evaporation of organic solvents at the low temperature, whereas it accelerates their decomposition at the high temperature. Due to the synergistic effect of CA matrix and BN filler, the obtained GPE exhibits a high ionic conductivity of 8.9 x 10(-3) S cm(-1) at 30 degrees C, an excellent electrochemical stability up to 5.5 V, and a good thermal stability. This work sheds light on the interaction between GPEs and the inorganic fillers, which is crucial for designing new polymer electrolyte systems.

引用

页数：9