ORGANIC SOLUTIONS FOR INSOLUBLE FOUR-VALENT METAL PHOSPHATES OR PYROPHOSPHATES OBTAINING, THEIR APPLICATION FOR ELECTRODES MODIFICATION AND FOR OBTAINING OF COMPOSITE MEMBRANE FOR FUEL CELLS WORKING AT TEMPERATURE MORE THAN 90°C AND/OR LOW RELATIVE MOISTURE Russian patent published in 2009 - IPC C01B25/37 B01D71/00 

FIELD: chemistry.

SUBSTANCE: invention is founded on obtaining of the initial organic solutions of fourvalent metal phosphates or pyrophosphates having the structures M(IV)[O₂P(OH)₂]₂[O₂PO(OH)] and M(IV)P₂O₇, whereat M(IV) is fourvalent metal and chosen from the Zr, Hf, Ti or their mixtures. The important feature of these solutions is that said compounds are formed during solvent evaporation. This feature allows easy including of the said compounds inside the membrane pores, to the polymer membranes and to the electrodes' boundaries. The compounds' particles have acid properties, high thermic stability insolubility in the water which may allow their using for enhancing the proton-exchange fuel cells ((PEMFC) effectiveness in temperature range 90-130°C. Unusual characteristics of the nonaqueous proton conductivity of the compounds M(IV)[O₂P(OH)₂]₂[O₂PO(OH)] open new prospects of their application in PEMFC at low relative moisture.

EFFECT: enhancing of the compounds scope of application.

16 cl, 11 dwg, 28 ex