钼磷酸铵及钼磷酸掺杂的聚合物电解质

Proton-conducting Polymer Electrolyte Doped with Molybdophosphoric Acidand Ammonium Molybdophosphate

以聚氧乙烯 ( PEO)为基质 ,掺杂适量的钼磷酸铵或钼磷酸 ,制备出 PEO-( NH4 ) 3PMo1 2 O4 0 及PEO-H3PMo1 2 O4 0 质子导电聚合物电解质膜 ,测定了其电导率 .讨论了加入 ( NH4 ) 3PMo1 2 O4 0 及 H3PMo1 2 O4 0 对PEO构型及 Keggin阴离子的影响 ,分析了 PEO-( NH4 ) 3PMo1 2 O4 0 及 PEO-H3PMo1 2 O4 0 复合膜质子电导提高的原因 .其中 PEO-( NH4 ) 3PMo1 2 O4 0 质子导电聚合物电解质复合膜的室温电导率最高可达 1 .4× 1 0 - 3S/cm.

Polymer inorganic composite films of PEO 12 NPMA(NPMA: ammonium molybdophosphate; PEO: polyethylene oxide, Aldrich, M w=600 000) and PEO 12 PMA(PMA: molybdophosphoric acid) have been prepared through a film casting method. The Keggin anions and the polymer molecules are linked together to form a new composite compound of PEO 12 PMA, which has a gauche conformation of PEO being changed to a certain degree. However, no new phase is observed in the PEO 12 NPMA composite film system. The protons in the composite materials form H bonds with the external oxygens of Keggin anions and the ether oxygens of PEO. The H bonding system of the PEO 12 NPMA film is superior to that of the PEO 12 PMA composite film. As a result, the conductivity of the PEO 12 NPMA film is higher than that of PEO 12 PMA film under the same condition.