TY - JOUR
T1 - A novel, easily synthesized, anhydrous derivative of phosphoric acid for use in electrolyte with phosphoric acid-based fuel cells
AU - Ansari, Younes
AU - Tucker, Telpriore G.
AU - Angell, Charles
N1 - Funding Information:
We appreciate the support of this research by the DOD Army Research Office under grant no. W911NF0710423 . We are grateful to Dr. Wei Huang for preliminary NMR studies that will become the subject of a more detailed future paper on the structures of the subject materials.
PY - 2013
Y1 - 2013
N2 - We build on the success of phosphoric acid as a fuel cell electrolyte, by designing a variant of the molecular acid that provides increased temperature range without sacrifice of high temperature conductivity or open circuit voltage. This is achieved by introduction of a hybrid component, based on silicon coordination of phosphate groups, which prevents decomposition or water loss to 250 °C, while enhancing free proton motion. We report conductivity studies to 285 °C and full H2/O2cell polarization curves to 226 °C with careful monitoring of fuel consumption. The current efficiency we report (current density per unit of fuel supplied per sec) is as high as the highest on record. A power density of 184 mW cm-2 is achieved at 226 °C with hydrogen flow rate of 4.1 ml min-1.
AB - We build on the success of phosphoric acid as a fuel cell electrolyte, by designing a variant of the molecular acid that provides increased temperature range without sacrifice of high temperature conductivity or open circuit voltage. This is achieved by introduction of a hybrid component, based on silicon coordination of phosphate groups, which prevents decomposition or water loss to 250 °C, while enhancing free proton motion. We report conductivity studies to 285 °C and full H2/O2cell polarization curves to 226 °C with careful monitoring of fuel consumption. The current efficiency we report (current density per unit of fuel supplied per sec) is as high as the highest on record. A power density of 184 mW cm-2 is achieved at 226 °C with hydrogen flow rate of 4.1 ml min-1.
KW - Anhydrous derivative of phosphoric acid
KW - Electrolyte
KW - Fuel cells
KW - High current efficiency
KW - Phosphoric acid-based fuel cells
KW - Silicophosphoric acid
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U2 - 10.1016/j.jpowsour.2013.03.003
DO - 10.1016/j.jpowsour.2013.03.003
M3 - Article
AN - SCOPUS:84875749864
SN - 0378-7753
VL - 237
SP - 47
EP - 51
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -