聚乙烯醇对过氧化银电极分解和电性能的影响

Effect of PVA on decomposition and electrical performance of silver peroxide electrodes

采用不同浓度的聚乙烯醇(PVA)溶液对过氧化银(Ag O)电极进行浸渍处理。采用示差扫描量热法(DSC)、扫描电子显微镜(SEM)、化学分析和单片放电对电极进行表征和电性能测试。结果表明,经浓度为1.0%的PVA溶液处理后,电极性能远远优于未处理的过氧化银电极,表现在过氧化银分解表观活化能为143.91 k J/mol,70 o C高温贮存后Ag O分解率仅为0.9%,放电容量衰减仅为18.4%。

Silver peroxide （AGO） electrodes were soaked in different concentrations of polyvinyl alcohol （PVA） solution. DSC, SEM, chemical analysis and cell discharge tests were conducted to characterize these electrodes. The results indicate that the AgO electrodes treating with optimal concentration of 1.0% PVA perform much better than the untreated ones, because their apparent activation energy, decomposing rate, and capacity fade rate is 143.91 kJ/mol, 0.9%, and 18.4%.