摘要
为研究工作条件对钛网基MEA性能的影响,以钛网作为电极支撑体材料,以Nafion117作为质子交换膜,以PtRu/XC-72R作为阳极催化剂,以Pt/XC-72R作为阴极催化剂,采用滴涂的方法制备了钛网基MEA阳极和阴极。采用成型温度为135℃,成型压力为5 MPa,保压时间为180 s的条件热压制备钛网基MEA并在工作条件进行测试,研究结果表明:(1)无论是在室温25℃条件下还是在高温60℃条件下,阴极氧化剂采用0.1 MPa的100 mL/min氧气的功率密度峰值均高于采用自呼吸空气的功率密度峰值;(2)无论是在室温25℃条件下,还是在高温60℃条件下,无论阴极氧化剂为自呼吸空气,还是0.1 MPa的100 mL/min氧气,电解液中的甲醇浓度对钛网基MEA的影响呈现了一致性,即当甲醇浓度从0.5 mol/L变大到1.0 mol/L时,钛网基MEA的功率密度峰值是增大的,当甲醇浓度从1.0 mol/L经过1.5mol/L增大到2.0 mol/L时,钛网基MEA的功率密度峰值逐渐减小;(3)当工作温度从25℃逐渐增大到80℃,钛网基MEA的功率密度峰值从5.19 mW/cm2逐渐增大到17.10 mW/cm2。
In order to research the effect of working conditions upon titanium mesh MEA （Ti-MEA） performance, titanium mesh was used as electrode substrata material, Nation 117 membrane as proton exchange membrane, and PtRu/XC-72R and Pt/XC-72R as anode catalyst and cathode catalyst respectively, the anode and cathode of Ti-MEA were prepared by drip-coated method. Ti-MEA was prepared by hot-pressing under 5 MPa for 180 s with 135 ℃ and tested under different working conditions. The research results show that： （1） whether the temperature condition is at room temperature （25 ℃） or high temperature （60℃）, the maximum power density of Ti-MEA with the cathode oxidant by 0.1 MPa ＆ 100 mL/min oxygen are higher than by air-breathing; （2） whether the temperature condition is at room temperature （25℃） or high temperature （60 ℃）, and whether the cathode oxidant is with air-breathing or 0.1 MPa ＆ 100 mL/min oxygen, the effect of methanol concentration upon Ti-MEA shows the consistency. When the methanol concentration enlarges from 0.5 mol/L to 1.0 mol/L, the peak power density of Ti-MEA increases; when the methanol concentration increases from 1.0 mol/L to 2.0 mol/L through 1.5 mol/L, the peak power density of Ti-MEA decreases; （3） When working temperature increases from 25 ℃ to 80 ℃, the peak power density of Ti-MEA increases from 5.19 mW/cm2 to 17.10 mW/cm2, gradually.
出处
《电源技术》
CAS
CSCD
北大核心
2012年第7期988-990,1010,共4页
Chinese Journal of Power Sources
基金
国家科技支撑计划课题(2011BAG02B10)
江苏省高校自然科学重大基础研究项目(08KJA480001)
南通市燃料电池重点实验室开放课题(R2011005)
南通大学自然科学基金(11Z080和11ZY007)
南通大学院级自然科学基金项目(J2011018)
关键词
直接甲醇燃料电池
膜电极组件
工作环境条件
钛网
电池性能
direct methanol fuel cell （DMFC）
membrane electrode assembly （MEA）
working conditions
titanium mesh
cell performance
