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Title: Exploring the Interface of Skin-Layered Titanium Fibers for Electrochemical Water Splitting

Journal Article · · Advanced Energy Materials
 [1];  [1];  [2];  [3];  [4];  [2];  [5];  [2];  [6];  [1];  [7];  [4];  [1];  [8];  [9];  [4];  [10];  [5];  [11]; ORCiD logo [12]
  1. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK‐14): Electrochemical Process Engineering 52425 Jülich Germany
  2. Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 70569 Stuttgart Germany
  3. Department of Chemistry Colorado School of Mines Golden CO 80401 USA
  4. National Renewable Energy Laboratory Golden CO 80401 USA
  5. Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 70569 Stuttgart Germany, Institute for Building Energetics Thermotechnology and Energy Storage (IGTE) University of Stuttgart Pfaffenwaldring 31 70569 Stuttgart Germany
  6. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research Plasma Physics (IEK‐4) 52425 Jülich Germany
  7. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK‐9): Fundamental Electrochemistry 52425 Jülich Germany
  8. Materials Science Division Argonne National Laboratory Lemont IL 60439 USA
  9. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK‐9): Fundamental Electrochemistry 52425 Jülich Germany, Rheinisch‐Westfälische Technische Hochschule Aachen Institute of Physical Chemistry 52056 Aachen Germany
  10. Department of Chemistry Colorado School of Mines Golden CO 80401 USA, National Renewable Energy Laboratory Golden CO 80401 USA
  11. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK‐14): Electrochemical Process Engineering 52425 Jülich Germany, Modeling in Electrochemical Process Engineering RWTH Aachen University 52056 Aachen Germany
  12. Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK‐14): Electrochemical Process Engineering 52425 Jülich Germany, Mechanical and Materials Engineering Queen's University Kingston Ontario K7L 3N6 Canada

Water electrolysis is the key to a decarbonized energy system, as it enables the conversion and storage of renewably generated intermittent electricity in the form of hydrogen. However, reliability challenges arising from titanium-based porous transport layers (PTLs) have hitherto restricted the deployment of next-generation water-splitting devices. Here, it is shown for the first time how PTLs can be adapted so that their interface remains well protected and resistant to corrosion across ˜4000 h under real electrolysis conditions. It is also demonstrated that the malfunctioning of unprotected PTLs is a result triggered by additional fatal degradation mechanisms over the anodic catalyst layer beyond the impacts expected from iridium oxide stability. Now, superior durability and efficiency in water electrolyzers can be achieved over extended periods of operation with less-expensive PTLs with proper protection, which can be explained by the detailed reconstruction of the interface between the different elements, materials, layers, and components presented in this work.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
China Scholarship Council (CSC); National Science Foundation (NSF); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357; AC36-08GO28308
OSTI ID:
1755964
Report Number(s):
NREL/JA--5900-77300; 2002926
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 8 Vol. 11; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
Germany
Language:
English

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