Technoeconomic Model and Pathway to <$2/kg Green Hydrogen Using Integrated Halide Perovskite Photoelectrochemical Cells

Austin Fehr, Todd Deutsch, Francesca Toma, Michael Wong, Aditya Mohite

Research output: Contribution to journalArticlepeer-review

3 Scopus Citations

Abstract

The cost of gray hydrogen produced via fossil fuel-based steam-methane reforming has led the U.S. Department of Energy to specify <$2/kg H2 as a target for commercially competitive green hydrogen generation methods. Integrated photoelectrochemical cells have been proposed as a solar-to-hydrogen conversion technology. Here, we describe a technoeconomically feasible pathway to reaching <$2/kg green H2 using integrated photoelectrochemical cells with halide perovskite photoabsorbers, low-cost conductive barriers, and low precious metal-content catalysts in an aqueous, membrane-separated cell. A base-case solar-to-hydrogen conversion efficiency of 20%, stable lifetime of 10 years, and a combined electrocatalyst-plus-panel cost of $50/m2 enabled a levelized cost of hydrogen of $2.43/kg, which dropped below $2/kg with improved performance metrics including material cost, improvements in process design, or subsidies. We relate these metrics to lab-scale reports to recommend best research practices for scientists and funding agencies working at this intersection of photovoltaics, electrocatalysis, and surface science.
Original languageAmerican English
Pages (from-to)4976-4983
Number of pages8
JournalACS Energy Letters
Volume8
Issue number12
DOIs
StatePublished - 2023

NREL Publication Number

  • NREL/JA-5900-87538

Keywords

  • hydrogen production
  • photoelectrochemical
  • solar hydrogen
  • techno-economic analysis

Fingerprint

Dive into the research topics of 'Technoeconomic Model and Pathway to <$2/kg Green Hydrogen Using Integrated Halide Perovskite Photoelectrochemical Cells'. Together they form a unique fingerprint.

Cite this