Modeling, simulation, and design criteria for photoelectrochemical water-splitting systems

Sophia Haussener, Chengxiang Xiang, Joshua M. Spurgeon, Shane Ardo, Nathan S. Lewis, Adam Z. Weber

Research output: Contribution to journalArticle

205 Citations (Scopus)

Abstract

A validated multi-physics numerical model that accounts for charge and species conservation, fluid flow, and electrochemical processes has been used to analyze the performance of solar-driven photoelectrochemical water-splitting systems. The modeling has provided an in-depth analysis of conceptual designs, proof-of-concepts, feasibility investigations, and quantification of performance. The modeling has led to the formulation of design guidelines at the system and component levels, and has identified quantifiable gaps that warrant further research effort at the component level. The two characteristic generic types of photoelectrochemical systems that were analyzed utilized: (i) side-by-side photoelectrodes and (ii) back-to-back photoelectrodes. In these designs, small electrode dimensions (mm to cm range) and large electrolyte heights were required to produce small overall resistive losses in the system. Additionally, thick, non-permeable separators were required to achieve acceptably low rates of product crossover.

Original languageEnglish
Pages (from-to)9922-9935
Number of pages14
JournalEnergy and Environmental Science
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 1 2012

ASJC Scopus subject areas

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

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