Title

New Low to Medium Temperature Electrolyte Separation Method and System for Alkaline Water Electrolysis

Abstract

A new electrolysis method of maintaining product gas separation by using fluid flow perpendicularly through porous electrodes rather than using a gas impermeable membrane has been developed. This eliminates the need for any type of membrane. Eliminating the need for a membrane in alkaline electrolysis allows the device to operate at temperatures above 120°C, where most ion conducting membranes would degrade and fail. Operating at higher temperatures reduces the anode and cathode overpotentials substantially. The reduction in overpotentials allows non-platinum group metals to be used, while increasing the electrical efficiency at comparable current densities.

Meeting Name

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage (2015: Jul. 26-31, Glasgow, United Kingdom)

Department(s)

Chemical and Biochemical Engineering

Second Department

Materials Science and Engineering

Keywords and Phrases

Electrodes; Electrolysis; Electrolytes; Energy conversion; Flow of fluids; Fuel storage; Hydrogen; Solid oxide fuel cells (SOFC); Temperature; Alkaline electrolysis; Alkaline water electrolysis; Electrical efficiency; Ion-conducting membranes; Medium temperature; Over potential; Porous electrodes; Separation methods; Gas permeable membranes

International Standard Book Number (ISBN)

9781607685395

International Standard Serial Number (ISSN)

19385862

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 Electrochemical Society Inc., All rights reserved.


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