Probing the degradation of carbon black electrodes in the presence of chloride by electrochemical impedance spectroscopy

被引：12

作者：

Easton, E. Bradley ^{[1
]}

Fruehwald, Holly M. ^{[1
]}

Randle, Rebecca ^{[1
,2
]}

Saleh, Farhana S. ^{[1
]}

Ebralidze, Iraklii I. ^{[1
]}

机构：

[1] Univ Ontario Inst Technol, Fac Sci, Electrochem Mat Lab, 2000 Simcoe St North, Oshawa, ON L1H 7K4, Canada

[2] Cardiff Univ, Sch Chem, Main Bldg,Pk Pl, Cardiff CF10 AT, Wales

来源：

CARBON | 2020年 / 162卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

CELL CATALYST LAYERS; OXYGEN REDUCTION REACTION; GAS-DIFFUSION ELECTRODES; IONIC-CONDUCTIVITY; SURFACE-AREA; FUEL-CELLS; MODEL; SUPERCAPACITOR; QUANTIFICATION; OXIDATION;

D O I：

10.1016/j.carbon.2020.02.086

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：

The influence of the presence of chloride ions (Cl-) on the electrochemical stability of a porous carbon black electrode was examined. Using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), we have observed that the durability of this porous carbon layer, similar to those used in fuel cells and supercapacitors, is altered in the presence of chloride. The presence of as little as 1 mM chloride leads to a substantial reduction in electrode capacitance and an increase in the total resistance of the porous layer, which will impact performance in electrochemical energy applications. The effect is more pronounced at higher chloride concentrations. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页码：502 / 509

页数：8

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