@article{35613,
  author = {Jason K Lee and Grace Y Lau and Mayank Sabharwal and Adam Z Weber and Xiong Peng and Michael C Tucker},
  title = {Titanium porous-transport layers for PEM water electrolysis prepared by tape casting},
  abstract = {<p>While the porous-transport layer (PTL) is a key component in PEM electrolyzers, it is one of the most<br />underexplored due to limited available structures. In this work, we present a novel PTL design for PEM<br />water electrolyzers enabled by a cost-effective, scalable tape-casting technique. A precise control of the<br />PTL pore structure is achieved by incorporating poreformers of various sizes, and by varying the titanium<br />and poreformer ratio. The structures are characterized with SEM and synchrotron X-ray computed<br />tomography imaging techniques. Comprehensive electrochemical performance analysis demonstrates<br />that higher titanium loading provides improved contact at the catalyst-layer/PTL interface but suffers<br />from severe mass-transport losses due to gas bubbles. We solve this mass-transport problem by mixing<br />in large poreformer beads that produce a highly porous structure with excellent gas removal properties<br />yet still maintaining mechanical integrity. The PTL fabricated with 60:40 Ti:PMMA ratio and 60 μm PMMA<br />bead size outperformed the standard commercial Ti powder-based PTL by 62 mV at 4 A/cm<sup>2</sup></p>},
  year = {2023},
  journal = {Journal of Power Sources},
  volume = {559},
  pages = {232606},
  month = {03/2023},
  issn = {03787753},
  url = {https://linkinghub.elsevier.com/retrieve/pii/S037877532201583X},
  doi = {10.1016/j.jpowsour.2022.232606},
  language = {eng},
}