不同锂盐对超支化/梳状复合型聚合物电解质的性能影响研究

户献雷; 梁晓旭; 章明秋; 张若昕; 张利萍; 阮文红

doi:10.13208/j.electrochem.151013

电化学 >

2016 , Vol. 22 >Issue 5: 535 - 541

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

研究论文

不同锂盐对超支化/梳状复合型聚合物电解质的性能影响研究

户献雷 ,
梁晓旭 ,
章明秋 ,
张若昕 ,
张利萍 ,
阮文红

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1. 中山大学化学与化学工程学院, 广东广州, 510275; 2. 广州天赐高新材料股份有限公司, 广东广州, 510760

收稿日期: 2015-10-13

修回日期: 2015-12-07

网络出版日期: 2016-01-04

基金资助

国家自然科学基金项目（No. 51473186）和广州市科技计划项目（No. 201508010052）资助

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

HU Xian-Lei ,
LIANG Xiao-Xu ,
ZHANG Ming-Qiu ,
ZHANG Ruo-Xin ,
ZHANG Li-Ping ,
RUAN Wen-Hong

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1.School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,China; 2. Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou 510600, China

Received date: 2015-10-13

Revised date: 2015-12-07

Online published: 2016-01-04

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摘要

利用PVA侧链上的羟基的化学活性, 采用超支化聚胺-酯对改性纳米SiO₂和PVA接枝改性, 并加入不同锂盐，制备了SiO₂-g-HBPAE/PVA-g-HBPAE超支化/梳状复合型聚合物电解质, 利用SEM观察了纳米粒子在基体中的分散情况, 采用DSC、拉伸实验以及介电谱研究了锂盐种类及添加量对复合体系性能的影响. 结果表明, 超支化接枝改善了SiO₂和基体的界面相容性; 磺酸类锂盐在复合材料中表现出自增塑现象, 材料的玻璃化转变温度(T_g)大幅度下降; LiClO₄在基体中的离解能力强于LiCF₃SO₃和 LiN(SO₃CF₃)₂; 当LiCF₃SO₃添加量为20 %(by mass, 下文同)时, 聚合物电解质的室温电导率达到最大值2.58×10^-6 S•cm^-1.

关键词： 聚合物电解质; 聚乙烯醇; 超支化聚胺-酯; 梳状大分子; 锂盐

本文引用格式

户献雷 , 梁晓旭 , 章明秋 , 张若昕 , 张利萍 , 阮文红 . 不同锂盐对超支化/梳状复合型聚合物电解质的性能影响研究[J]. 电化学, 2016 , 22(5) : 535 -541 . DOI: 10.13208/j.electrochem.151013

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 LiClO₄manifested 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.

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

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