Physicochemical properties of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium ion battery applications: Influence of poly(ethylene oxide) molecular weight

被引：33

作者：

Correia, Daniela M. ^{[1
,2
]}

Costa, Carlos M. ^{[2
]}

Nunes-Pereira, Joao ^{[2
]}

Silva, Maria M. ^{[1
]}

Botelho, Gabriela ^{[1
]}

Gomez Ribelles, Jose Luis ^{[3
,4
]}

Lanceros-Mendez, Senenxtu ^{[2
]}

机构：

[1] Univ Minho, Ctr Dept Quim, P-4710057 Braga, Portugal

[2] Univ Minho, Ctr Dept Fis, P-4710057 Braga, Portugal

[3] Univ Politecn Valencia, Ctr Biomat & Ingn Tisular, Valencia 46022, Spain

[4] CIBER Bioingn Biomat & Nanomed, Valencia, Spain

来源：

SOLID STATE IONICS | 2014年 / 268卷

关键词：

Polymer blend; Molecular weight; Battery separator; Thermal degradation; Electrochemical techniques; POLYMER ELECTROLYTES; THERMAL-DEGRADATION; SEPARATORS; FLUORIDE); CONDUCTIVITY; COPOLYMER; LIQUID; FLUORIDE-TRIFLUORETHYLENE); TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.ssi.2014.09.029

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：

Polymer blends based on poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide), P(VDF-TrFE)/PEO, with different PEO contents and molecular weights have been prepared for use as Li-ion battery separator membranes. The electrolyte uptake strongly depends on PEO content within the polymer blend. Thermal, mechanical and electrical properties of the membranes are dependent both on PEO content and molecular weight. A thermal degradation mechanism is also proposed as PEO content has a large influence on the activation energy and thermal degradation of P(VDF-TrFE). After electrolyte uptake, all polymer blends exhibit high ionic conductivity at room temperature, the highest value being 0.7 mS cm(-1) which was obtained for the 40/60 membrane with PEO with M-w = 10 kDa. From the point of view of lithium-ion battery application, polymer blends with 10 kDa molecular weight PEO are more adequate due to its excellent mechanical properties and high ionic conductivity. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：54 / 67

页数：14

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