A novel, easily synthesized, anhydrous derivative of phosphoric acid for use in electrolyte with phosphoric acid-based fuel cells

Younes Ansari, Telpriore G. Tucker, Charles Angell

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)47-51
Number of pages5
JournalJournal of Power Sources
Volume237
DOIs
StatePublished - 2013

Fingerprint

phosphoric acid
Phosphoric acid
Electrolytes
fuel cells
Fuel cells
electrolytes
water loss
Derivatives
conductivity
fuel consumption
Silicon
Open circuit voltage
open circuit voltage
Fuel consumption
Protons
radiant flux density
Hydrogen
phosphates
Phosphates
Current density

Keywords

  • Anhydrous derivative of phosphoric acid
  • Electrolyte
  • Fuel cells
  • High current efficiency
  • Phosphoric acid-based fuel cells
  • Silicophosphoric acid

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

A novel, easily synthesized, anhydrous derivative of phosphoric acid for use in electrolyte with phosphoric acid-based fuel cells. / Ansari, Younes; Tucker, Telpriore G.; Angell, Charles.

In: Journal of Power Sources, Vol. 237, 2013, p. 47-51.

Research output: Contribution to journalArticle

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