Effects of Lithium Salts on the Properties of Hyperbrandched/Comb-like Composite Polymer Electrolytes

Authors

Xian-Lei HU, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,China;Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou 510600, China;
Xiao-Xu LIANG, Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou 510600, China;
Ming-Qiu ZHANG, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,China;
Ruo-Xin ZHANG, Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou 510600, China;
Li-Ping ZHANG, Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou 510600, China;
Wen-Hong RUAN, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,China;Follow

Corresponding Author

Wen-Hong RUAN(cesrwh@mail.sysu.edu.cn)

Abstract

Based on the chemical characteristics of the hydroxyl group of PVA side-chain, the hyperbrandched poly(amine-ester) (HBPAE) was used to hypergraftingly pretreated nano-silica (SiO₂) and polyving akohol (PVA). And different lithium salts were added to fabricate the SiO₂-g-HBPAE/PVA-g-HBPAE hyperbrandched/comb-like composite polymer electrolytes (CPEs). The dispersion of nanoparticles in matrix was observed by SEM. The effects of different lithium salts on the properties of CPEs were studied by DSC, tensile test and dielectric spectra. The results showed that the hypergrafting method improved the interphase compatibility between SiO₂ and matrix. Sulfonic acid type lithium salts accelerated self-plasticizing with the Tg values being decreased. The LiClO₄ manifested stronger solubility than LiCF₃SO₃ and LiN(SO₃CF₃)₂ in the polymer matrices. The ionic conductivity of the polymer electrolytes reached the maximum value of 2.58×10^-6 S·cm^-1 after the addition of 20% LiCF₃SO₃ at room temperature.

Graphical Abstract

Keywords

polymer electrolytes; polyving akohol, hyperbrandched poly(amine-ester), comb-like polymer, lithium salts

DOI Link

https://doi.org/10.13208/j.electrochem.151013

Publication Date

2016-10-28

Online Available Date

2016-01-04

Revised Date

2015-12-07

Received Date

2015-10-13

Recommended Citation

Xian-Lei HU, Xiao-Xu LIANG, Ming-Qiu ZHANG, Ruo-Xin ZHANG, Li-Ping ZHANG, Wen-Hong RUAN. Effects of Lithium Salts on the Properties of Hyperbrandched/Comb-like Composite Polymer Electrolytes[J]. Journal of Electrochemistry, 2016 , 22(5): 535-541.
DOI: 10.13208/j.electrochem.151013
Available at: https://jelectrochem.xmu.edu.cn/journal/vol22/iss5/11