Synthesis of Novel Fluorinated Phosphonic and Phosphinic Acid Electrolytes for Phosphoric Acid Fuel Cells. Annual Report January 1, 1989-December 31, 1989

摘要

A practical synthesis of (HO)2P(O)CF2CF2P(O)(OH)2(H2O) has been developed from commercially available precursors. Preliminary electrochemical evaluation of the bis phosphonic acid has provided encouraging results. Methodology for the preparation of homologous flourinated bis phosphonic acids of the type (HO)2P(O)(CF2)nP(O)(OH)2 (where n = 3,4,6) has been developed. In addition, samples of (HO)2P(O)(CF2)nSO3H(H2O) (where n = 1,2) have been prepared. Methodology to demonstrate the preparation of (RO)2P(O)(CF2)xO(CF2)ySO3H has proven successful.