固体酸形燃料電池
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↑ SAFCell Inc. awarded Enhancement grant from US Army. Pasadena, California. SAFCell, Inc. May 16, 2016. http://www.ultracell-llc.com/assets/UltraCell_BT-press-release-17-May-2016-FINAL.pdf
↑ Solar/Fuel Cell-Powered Caltech-Designed Enviro-Toilet to Debut in India. Pasadena, California. The Hydrogen and Fuel Cell Letter. February 2014. http://www.hfcletter.com/Content/EnviroToilet.aspx
↑ 2009年、室山広樹、江口実験室、京都大学 https://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/124508/1/ykogk03023.pdf