Cy Fujimoto


Cy Fujimoto, Ph.D.


Contact Information

Cy Fujimoto, Ph.D. / (505) 844-6432


Cy Fujimoto is a Principle Member of the Technical Staff in the Nanoscale Sciences Department at Sandia National Laboratories. Cy’s work focuses on developing membrane separators for electrochemical applications. In the Office of Electricity’s program, he is developing membranes for several flow battery chemistries and partners with various national labs and industrial collaborators. This work has led to several patents and recently several of these patents were licensed by a US materials company.


Ph.D. in Chemistry, University of California, Irvine, 2001

B.S. in Chemistry, University of Hawaii, Manoa, 1996

Key Publications

D.P. Leonard, S. Maurya, E.J. Park, L.D. Manriquez, S. Noh, X. Wang, C. Bae, E.D. Baca, C. Fujimoto, Y.S. Kim “Asymmetric electrode ionomer for low relative humidity operation of anion exchange membrane fuel cells” J. Mater. Chem. A, 2020,8, 14135-14144, DOI: 10.1039/D0TA05807F.

D. Li, E.J. Park, W. Zhu, Q. Shi, Y. Zhou, H. Tian, Y. Lin, A. Serov, B. Zulevi, E.D. Baca, C. Fujimoto, H.T. Chung, Y.S. Kim “Highly quaternized polystyrene ionomers for high performance anion exchange membrane water electrolyzers” Nat Energy 5, 378–385 (2020), DOI: 10.1038/s41560-020-0577-x.

E.J. Park, S. Maurya, M.R. Hibbs, C.H. Fujimoto, K-D. Kreuer, Y.S. Kim “Alkaline Stability of Quaternized Diels-Alder Polyphenylenes” Macromolecules 2019, 52, 14, 5419–5428, DOI: 10.1021/acs.macromol.9b00853.

D. Li, I. Matanovic, A.S. Lee, E.J. Park, C. Fujimoto, H.T. Chung, Y.S. Kim “Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer” ACS Appl. Mater. Interfaces 2019, 11, 10, 9696–9701, DOI: 10.1021/acsami.9b00711.

Key Patents