一体式再生燃料电池性能

摘要

报道了反应条件对一体式再生燃料电池单体电池性能的影响,并对单体电池的极化特性和循环稳定性进行测试.结果表明:URFC单体电池表现出优异的电性能和良好的循环稳定性.双模式工作条件下,反应温度控制在60~70℃比较合适.在燃料电池模式下,提高氧气压力可以更显著的提高电池性能;在氢气相对湿度为100%条件下,氧气相对湿度对电池性能影响不大,当电流密度大于500 mA/cm2时,采用干态氧气和相对湿度为100%氧气时,电池性能趋于一致.%The influence of reaction conditions on the performance of a unit cell of unitized regenerative fuel cell ( URFC ) was reported. The cycling performance and polarization curves of the unit cell of URFC in the hydrogen and oxygen fuel cell and water electrolysis modes were tested. The unit cell of URFC exhibited excellent performance and stability in cycling test during URFC operation.The results showed that the optimum reaction temperature was from 60 ℃ to 70 ℃ in both fuel cell and water electrolysis modes. In fuel cell mode, increasing oxygen pressure would improve remarkably the performance of URFC. At hydrogen relative humidity of 100％, oxygen relative humidity had less influence on the performance of URFC in fuel cell mode. The performance of the unit cell by oxygen without humidifying was identical to that of the unit cell by oxygen relative humidity of 100％ in fuel cell mode when current density was greater than 500 mA/cm2.