Hyperbranched polyether boosting ionic conductivity of polymer electrolytes for all-solid-state sodium ion batteries

被引：58

作者：

Chen, Guanghai ^{[1
]}

Ye, Lin ^{[1
]}

Zhang, Kun ^{[1
]}

Gao, Ming ^{[1
]}

Lu, Hang ^{[1
]}

Xu, Huajie ^{[2
]}

Bai, Ying ^{[1
]}

Wu, Chuan ^{[1
,3
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Environm Sci & Engn, 5 South Zhongguancun St, Beijing 100081, Peoples R China

[2] Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China

[3] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2020年 / 394卷

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Sodium ion batteries; All-solid-state; Hyperbranched polyether; Grafting site; Plasticizing effect; Composite electrolytes; RING-OPENING POLYMERIZATION; CATHODE; NA3V2(PO4)(3); PERFORMANCE;

D O I：

10.1016/j.cej.2020.124885

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Polyether, especially, poly (ethylene oxide) has attracted extensive attention in polymer electrolytes since 1973 due to the superior coordination ability with alkali metal ions. However, the ionic conductivity of linear polyether is suppressed by the inherent effortless crystallizability. Here we synthesized hyperbranched polyether for composite polymer electrolytes (named as PMH9-1/1-3 NaTFSI) with an ionic conductivity of 5.7 x 10(-4) S cm(-1) at room temperature used in all-solid-state sodium ion batteries (ASIBs). The effect of grafting site on segmental motion and the plasticizing effect of TFSI- anion on polyether are revealed by nuclear magnetic resonance and infrared spectrum characterizations. ASIBs using PMH9-1/1-3 NaTFSI exhibit a high capacity retention ratio of 92% at 0.2C after 300 cycles. Studies on the grafting site on polyether backbone and the plasticizing effect of TFSI-anion make sense to fabricating composite electrolytes with high performance for ASIBs.

引用

页数：10

共 53 条

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