权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of High Proton-conducting Glasses and their application to fuel cell electrolyte

高质子导玻璃的研制及其在燃料电池电解质中的应用

基本信息

批准号：
12555188
负责人：
NOGAMI Masayuki
金额：
$ 7.94万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555188/
关键词：
proton conduction glass sol-gel electrolyte P_2O_5-SiO_2 ゾルゲルプロトン伝導固体電解質

项目摘要

Low temperature fuel cell system has attracted much attention because of its ability to produce high energy without the emission of harmful pollutants. For this purpose, the membranes with high proton conductivity and high chemical and thermal durability are required as the electrolytes of the fuel cell. Our interest focuses on the preparation of high proton-conducting glasses, and using a sol-gel method we succeeded in the preparation of P_2O_5-containing glasses exhibiting conductivities of 10^<-4>〜10^<-2> S/cm at room temperature.Two porous 5P_2O_5-95SiO_2 (mol%) glasses having different pore properties were prepared by the sol-gel method using Si(OC_2H_5)_4, PO(OCH_3)_3 and POCl_3, which are designated as No.1 and 3, respectively. It was found that the sample No.1 exhibits narrow pore size distribution with an average radius of 1.5 nm, whereas the sample No.3 has wide distribution ranging from 5 to 20 nm and an average radius of 8 nm. The conductivities were measured as a function … More of a ambient humidity and temperature. We found that the conductivity increases with increasing the relative humidity, but their humidity dependence is substantially different in two samples. In the sample No.1, the conductivity is 〜1xlO^<-6> S/cm at 30 %RH, and rapidly increases with increasing humidity, reaching a constant value of 〜1x10^<-2> S/cm above 〜70%. Of further interest was that the sample No.1 keeps high conductivity during decreasing humidity, though it gradually decreases at the humidity below 〜50%. This result indicates that the glass exposed once in high humidity holds the water in its pores and exhibits high conductivity irrespective of the humidity change. This finding is important for the practical application of this glass, because it enables the water management simple, consequently resulting in significant decrease of cost. On the other hand, the sample No.3 exhibits gradual increase in the conductivity with increasing the humidity up to 〜80%, at which the conductivity rapidly increases and reaches to 〜5xlO^<-2> S/cm. The conductivity in sample No.3 reversibly changes with the changed the humidity. It also was found that our glasses have potential as the electrolyte of fuel cell. Less

低温燃料电池系统因其能够产生高能量而不排放有害污染物而备受关注。为此，需要具有高质子传导性和高化学和热耐久性的膜作为燃料电池的电解质。本论文以Si（OC_2H_5）_4、PO（OCH_3）_3和POCl_3为原料，采用溶胶-凝胶法制备了两种具有不同孔结构的多孔5P_2O_5-95SiO_2（mol%）玻璃，并在此基础上制备了一种具有高质子导电性<-4>的多孔玻璃<-2>。它们分别被指定为1号和3号。发现样品No.1显示出平均半径为1.5nm的窄孔径分布，而样品No.3具有5至20 nm的宽分布和8 nm的平均半径。测量电导率作为函数 ...更多信息环境湿度和温度。我们发现，电导率随着相对湿度的增加而增加，但它们的湿度依赖性在两个样品中是实质上不同的。在1号样品中，在30%RH下电导率为101 x10 ^<-6>S/cm，并且随着湿度的增加而迅速增加，在1070%以上达到101 x10 ^ S/cm的恒定值<-2>。进一步感兴趣的是，1号样品在降低湿度期间保持高电导率，尽管在低于100%的湿度下电导率逐渐降低。该结果表明，在高湿度下暴露一次的玻璃将水保持在其孔中，并且显示出高导电性，而与湿度变化无关。这一发现对于这种玻璃的实际应用是重要的，因为它使得水管理简单，从而导致成本显著降低。另一方面，3号样品的电导率随着湿度的增加而逐渐增加，直至约80%，此时电导率迅速增加，达到约5xlO^<-2>S/cm。3号样品的电导率随湿度的变化而可逆地变化。研究还发现，该玻璃具有作为燃料电池电解质的潜力。少