@article{35553,
  author = {Fengyu Shen and Michael Reisert and Ruofan Wang and Prabhakar Singh and Michael C Tucker},
  title = {Assessment of Protective Coatings for Metal-Supported Solid Oxide Electrolysis Cells},
  abstract = {<p><span>Green hydrogen is essential to achieving carbon neutrality, and solid oxide electrolysis cells can produce hydrogen using renewable power and waste heat. Insufficient long-term durability of solid oxide electrolysis cells has impeded their commercialization. Here, coatings in the porous stainless steel support of metal-supported solid oxide electrolysis cells (MS-SOECs) are used to dramatically improve their performance and durability. The long-term degradation rate of uncoated MS-SOECs is highly dependent on the current density, with the fastest degradation occurring at the highest current density tested, 0.5 A cm</span><sup><span>–2</span></sup><span>. At this current density, coatings are quite effective. Three protective coatings, Co</span><sub><span>3</span></sub><span>O</span><sub><span>4</span></sub><span>&nbsp;deposited by atomic layer deposition (ALD), Co</span><sub><span>3</span></sub><span>O</span><sub><span>4</span></sub><span>&nbsp;deposited by electroplating deposition (ED), and CuMn</span><sub><span>1.8</span></sub><span>O</span><sub><span>4</span></sub><span>&nbsp;(CMO) deposited by electrophoretic deposition (EPD), are explored to enhance the performance of MS-SOECs with La</span><sub><span>0.6</span></sub><span>Sr</span><sub><span>0.4</span></sub><span>Co</span><sub><span>0.2</span></sub><span>Fe</span><sub><span>0.8</span></sub><span>O</span><sub><span>3</span></sub><span>–Sm</span><sub><span>0.2</span></sub><span>Ce</span><sub><span>0.8</span></sub><span>O</span><sub><span>3</span></sub><span>&nbsp;(LSCF-SDC) as the oxygen catalyst and SDC-Ni as the fuel catalyst. The initial average current density at 1.4 V is increased with coatings. It is 0.83 mA cm</span><sup><span>–2</span></sup><span>&nbsp;for the ALD cells, 1.05 mA cm</span><sup><span>–2</span></sup><span>&nbsp;for the ED cells, and 1.13 mA cm</span><sup><span>–2</span></sup><span>&nbsp;for the EPD cells, compared to 0.65 mA cm</span><sup><span>–2</span></sup><span>&nbsp;for the bare cells at 700 °C with 50% H</span><sub><span>2</span></sub><span>–50% H</span><sub><span>2</span></sub><span>O. The degradation rate over 1000 h of continuous operation is reduced from 36% to 26%, 27%, and 19% kh</span><sup><span>–1</span></sup><span>&nbsp;with the three coatings, respectively. These improvements are ascribed to reduced Cr poisoning on the oxygen catalyst, which is one of the primary degradation modes for this type of MS-SOEC.</span></p>},
  year = {2022},
  journal = {ACS Applied Energy Materials},
  volume = {5},
  pages = {9383 - 9391},
  month = {08/2022},
  issn = {2574-0962},
  url = {https://pubs.acs.org/doi/10.1021/acsaem.2c00655},
  doi = {10.1021/acsaem.2c00655},
  language = {eng},
}