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Title: Thin film surface modifications of thin/tunable liquid/gas diffusion layers for high-efficiency proton exchange membrane electrolyzer cells

Journal Article · · Applied Energy
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  1. Univ. of Tennessee, Knoxville, TN (United States). Nanodynamics and High-Efficiency Lab for Propulsion and Power (NanoHELP), Department of Mechanical, Aerospace & Biomedical Engineering, UT Space Institute
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)

We present that a proton exchange membrane electrolyzer cell (PEMEC) is one of the most promising devices for high-efficiency and low-cost energy storage and ultrahigh purity hydrogen production. As one of the critical components in PEMECs, the titanium thin/tunable LGDL (TT-LGDL) with its advantages of small thickness, planar surface, straight-through pores, and well-controlled pore morphologies, achieved superior multifunctional performance for hydrogen and oxygen production from water splitting even at low temperature. Different thin film surface treatments on the novel TT-LGDLs for enhancing the interfacial contacts and PEMEC performance were investigated both in-situ and ex-situ for the first time. Surface modified TT-LGDLs with about 180 nm thick Au thin film yielded performance improvement (voltage reduction), from 1.6849 V with untreated TT-LGDLs to only 1.6328 V with treated TT-LGDLs at 2.0 A/cm2 and 80°C. Furthermore, the hydrogen/oxygen production rate was increased by about 28.2% at 1.60 V and 80°C. The durability test demonstrated that the surface treated TT-LGDL has good stability as well. Finally, the gold electroplating surface treatment is a promising method for the PEMEC performance enhancement and titanium material protection even in harsh environment.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308; FE0011585; AC05-00OR22725
OSTI ID:
1393374
Alternate ID(s):
OSTI ID: 1435298; OSTI ID: 1549960; OSTI ID: 1784216
Report Number(s):
NREL/JA-5900-70128
Journal Information:
Applied Energy, Vol. 206, Issue C; ISSN 0306-2619
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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