研制了两只单体电池串联的被动式直接甲醇燃料电池(DMFC),无外部泵等辅助设施。考察了甲醇的浓度和温度、空气提供方式对单体电池性能的影响及单体电池的长期运行性能。单体电池在室温(25℃)下,贵金属载量为2.5 mg/cm2、甲醇浓度为3 mol/L时,性能最佳,峰值功率密度可达10 mW/cm2。提高甲醇温度和采用流动的空气,可提高电池的性能。单体电池在无水热管理系统1、00 mA放电的条件下,可在室温下连续、稳定地工作4 h。A passive direct methanol fuel cell(DMFC) with two single cells in series without auxiliary devices such as external pumps was designed and fabricated.The effects of methanol concentration and temperature,the air supply mode on the performance of single cell and the long-time operation performance of single cell were investigated.The single cell had optimal performance at room temperature(25 ℃) with 3 mol/L methanol and the noble metal loading was 2.5 mg/cm2,the peak power density could reach 10 mW/cm2.The increasing of methanol temperature and using flowing air could improve the performance of the cell.The single cell could work stably and continuously for 4 h at room temperature under the condition without water and thermal management systems and 100 mA discharge
