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Journal of Applied Electrochemistry

, Volume 48, Issue 3, pp 305–316 | Cite as

Investigations on electrode configurations for anion exchange membrane electrolysis

  • Hiroshi ItoEmail author
  • Naoki Miyazaki
  • Shota Sugiyama
  • Masayoshi Ishida
  • Yuka Nakamura
  • Shinya Iwasaki
  • Yasuo Hasegawa
  • Akihiro Nakano
Research Article
Part of the following topical collections:
  1. Hydrogen production

Abstract

Investigations on configurations and properties of the electrode in the membrane electrode assembly (MEA) of an electrolyzer using an anion exchange membrane (AEM) were performed based on an experimental study using a small single electrolysis cell. First, two different configurations of the catalyst layer (CL) for the MEA were prepared using commercially available materials: a catalyst-coated membrane (CCM) and a catalyst-coated substrate (CCS). Experimental electrolysis results revealed that the electrode configuration appropriate for the MEA of AEM electrolyzers is CCM-cathode and CCS-anode. Then, the effect of electrode properties (catalyst loading and binder content in CLs) on electrolysis performance was examined experimentally, revealing an optimal range of catalyst loading and binder content.

Graphical Abstract

Keywords

Anion exchange membrane Catalyst layer Catalyst-coated membrane Catalyst-coated substrate Binder 

List of symbols

\(i\)

Current density, A cm− 2

\({R_{{\text{cell}}}}\)

Ohmic resistance of cell, Ω cm2

\({T_{{\text{cell}}}}\)

Cell temperature, K (°C)

t

Time, sec (min)

\({V_{{\text{cell}}}}\)

Cell voltage, V

\({w_{{\text{cat\_A}}}}\)

Catalyst loading in anode catalyst layer, mg cm− 2

\({w_{{\text{cat\_C}}}}\)

Catalyst loading in cathode catalyst layer, mg cm− 2

\({\omega _{\text{i}}}\)

Ionomer (binder) content in catalyst layer formed by catalyst-coated membrane, wt%

\({\omega _{\text{P}}}\)

Polytetrafluoroethylene (binder) content in catalyst layer formed by catalyst-coated substrate, wt%

Abbreviations

AEM

Anion exchange membrane

AFC

Alkaline fuel cell

CCM

Catalyst-coated membrane

CCS

Catalyst-coated substrate

CL

Catalyst layer

GDL

Gas diffusion layer

HER

Hydrogen evolution reaction

IEC

Ion exchange capacity

IPA

Isopropyl alcohol

MEA

Membrane electrode assembly

NHE

Normal hydrogen electrode

OER

Oxygen evolution reaction

OPE

Octylphenol ethoxylate

PEM

Proton exchange membrane

PEMFC

Proton exchange membrane fuel cell

PFA

Perfluoroalkoxy alkane

PGM

Platinum-group metals

PTFE

Polytetrafluoroethylene

RES

Renewable energy sources

Notes

Acknowledgements

The authors gratefully acknowledge the financial support from the Japan Society for the Promotion of Science (JSPS) through the Grants-in-Aid for Scientific Research (KAKENHI)—Grant Number JP17K05970. The authors wish to express their gratitude to Tokuyama Corporation for their helpful advice. The authors also thank Mr. Akira Takatsuki (AIST) for his SEM expertise.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Hiroshi Ito
    • 1
    Email author
  • Naoki Miyazaki
    • 2
  • Shota Sugiyama
    • 2
  • Masayoshi Ishida
    • 2
  • Yuka Nakamura
    • 3
  • Shinya Iwasaki
    • 3
  • Yasuo Hasegawa
    • 1
    • 3
  • Akihiro Nakano
    • 1
  1. 1.Research Institute for Energy ConservationNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
  2. 2.University of TsukubaTsukubaJapan
  3. 3.Tokyo Institute of TechnologyYokohamaJapan

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