Improving Resistance-Temperature Characteristic of Polyethylene/Carbon Black Composites by Poly(3,4-Ethylenedioxythiophene)-Functionalized Multilayer Graphene

被引：10

作者：

Shi, Guangfa ^{[1
]}

Cai, Xiaomin ^{[1
]}

Wang, Wenqiang ^{[1
]}

Wang, Gengchao ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai Key Lab Adv Polymer Mat, POB 289,130 Meilong Rd, Shanghai 200237, Peoples R China

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2020年 / 221卷 / 14期

基金：

中国国家自然科学基金;

关键词：

conducting polymers; multilayer graphene; NTC effects; polymeric PTC materials; POLYMER COMPOSITES; CARBON-BLACK; FUNCTIONALIZED GRAPHENE; CONJUGATED POLYMER; PERFORMANCE; NANOCOMPOSITES; BEHAVIOR; CONDUCTIVITY; NANOTUBES; FILLERS;

D O I：

10.1002/macp.202000144

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polymeric positive temperature coefficient (PTC) materials can be used to install "brake" technology for the thermal runaway of lithium-ion batteries. However, it still has poor cycle stability and obvious negative temperature coefficient (NTC) effect, which reduces the reliability of the material. In order to solve these problems, conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) modified multilayer graphene (MLG) conductive additive (PEDOT-MLG) is introduced into middle density polyethylene/carbon black (MDPE/CB) system. Compared with the conventional modification, the PEDOT modified MLG shows high conductivity and excellent thermal stability. In addition, the introduction of PEDOT-MLG into MDPE/CB can further reduce the room temperature resistivity due to the good compatibility between the modified graphene and the matrix, thus improving the PTC intensity to 7.1. What is more, MLG limits the re-aggregation of CB particles when the temperature further rises, which effectively weakens the NTC effect.

引用

页数：10

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