直接硼氢化钠/双氧水燃料电池研究  

Elementary study of a direct borohydride/H_2O_2 fuel cell

作　　者：毛示旻[1,2] 刘建国[1,3,2] 邹志刚[1,3,2] 周毅[1,2] 陈建伟[1] 王小奇[1] 顾军[1,2] 于涛[1,2] 

机构地区：[1]南京大学物理系环境材料与再生能源研究中心,江苏南京210093 [2]南京大学固体微结构物理国家重点实验室,江苏南京210093 [3]南京大学材料科学与工程系,江苏南京210093

出　　处：《电源技术》2008年第12期827-831,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金(20528302);江苏省自然科学基金(BK2006718);江苏省高技术研究计划(BG2006030);国家大学生创新性实验计划项目

摘　　要：采用Pt/C作为催化剂成功地组装了直接硼氢化钠/双氧水燃料电池,并考察了不同操作温度、溶液流速和浓度条件下电池的放电性能。60℃时电池的最大比功率可以达到130mW/cm2,在40℃时0.1A/cm2放电条件下电池电压约为0.7V,性能明显优于相同条件下直接甲醇燃料电池。同时研究了不同厚度电解质膜对电池性能的影响,采用Nafion117膜(厚度175mm)的电池开路电压比Nafion112(厚度50mm)高约180mV,但Nafion112在高电流密度放电时表现出了更好的性能。因此,膜厚度不仅影响电池的内阻而且还会影响反应物的相互渗透。此外,还测试了短时间恒电流放电,电池性能未出现下降,而且放电后催化层和膜仍然保持紧密结合。A direct borohydride/H2O2 fuel cell with Pt/C and Nation membrane was fabricated successfully. Performances with various temperatures, concentrations and fluxes of borohydride/H2O2 were investigated by measuring their polarization curves. The maximum power density of 130 mW/cm^2 was obtained at 60 ℃, and the cell voltage discharging at 0.1 A/cm^2 was over 0.7 V at 40℃, which was obviously better than that of direct methanol fuel cell under the same condition. The effect of membrane thickness on the cell performance was also studied. The open circuit voltage （OCV） of Nafion117 was 180 mV, higher than that of Nafion112. However, the cell with Nation 112 showed better performance in high current region. It indicates that the performance of direct borohydride/H2O2 fuel cell was influenced by both the reactant crossover and membrane conductivity. Furthermore, the cell voltage kept quite stable during 1.5 hours constant current discharging. The morphology of MEA cross-section results implie that the catalyst layer and Nation membrane are still bonded together strongly after the experiment.

关 键 词：直接硼氢化钠燃料电池 双氧水 电池性能 Nation膜厚度 NaBH4渗透 

分 类 号：TM911.4[电气工程—电力电子与电力传动]