Poly(3,4-ethylenedioxythiphene) (PEDOT)-Modified Anodes: Reduced Methanol Crossover in Direct Methanol Fuel Cells

被引：19

作者：

Stanis, Ronald J. ^{[1
]}

Lambert, Timothy N. ^{[1
]}

Yaklin, Melissa A. ^{[1
]}

机构：

[1] Sandia Natl Labs, Dept Mat Devices & Energy Technol, Albuquerque, NM 87185 USA

来源：

ENERGY & FUELS | 2010年 / 24卷 / 05期

关键词：

POLYMER ELECTROLYTE MEMBRANES; PROTON CONDUCTIVITY; POLYBENZIMIDAZOLE; CATALYST; HYDROGEN; DMFC; PERFORMANCE; EFFICIENCY; SUPPORT; PEDOT;

D O I：

10.1021/ef100034x

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A new method to reduce methanol crossover in fuel cells is presented. This approach relies on coating an anode gas diffusion layer with poly(3,4-ethylenedioxythiophene), which is achieved by an electropolymerization method. Methanol permeability through commercially available gas diffusion layers was reduced from 4.5 x 10(-5) to as low as 1.8 x 10(-6) cm(2) s(-1). The use of the polymer increased the specific resistance from 0.07 to as high as 2.5 Omega cm(2). Fuel cell testing demonstrated a positive shift in cell voltage of about 70 mV in the low current density region of the polarization curves.

引用

页码：3125 / 3129

页数：5

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