SBIR Phase I: Proton-Conducting Zeolite Membranes for Low-Temperature Fuel Cells

SBIR 第一阶段：用于低温燃料电池的质子传导沸石膜

• 批准号: 9561236
• 负责人: Krishna Choudhary
• 金额: $ 7.5万
• 依托单位: Polywood, Incorporated
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9561236&HistoricalAwards=false
• 关键词: SBIR; Phase; Proton; Conducting; Zeolite

The operating temperature range of low-temperature proton-exchange membrane (PEM) fuel cells can be increased by using proton-conducting inorganic membranes instead of polymeric PEM electrolytes. This Small Business Innovation Research (SBIR) Phase I project will develop proton-conducting, membrane-like zeolites for use in low-temperature fuel cells. Prototype fuel cells will also be developed and tested. Low-temperature ionic conductivity in zeolites will be induced by incorporating proton-conducting hydrous salt ions as cations in the zeolite lattice. The cations in zeolites, along with protons, reside in the microscopic channels, cages, and cavities of the zeolite framework. The structure and chemistry of cations in proton-conducting zeolites will be investigated by spectroscopic techniques: extended X-ray-absorption fine structure (EXAFS), X-ray-absorption near edge structure (XANES), X-ray photoelectron spectroscopy (XPS), and nuclear magnetic resonance (NMR) spectroscopy. Ionic conductivity will be determined by AC impedance and DC conductivity measurements. The structural and chemical information, to be obtained by spectroscopic studies, will be used to optimize the chemical composition and crystal structure of proton-conducting zeolites. In Phase I, proton-conducting mordenite and ZSM-5 zeolite thin films on conductive porous substrates will be synthesized. The zeolite films will be prepared by hydrothermal crystallization from aluminosilicate gels followed by ion-exchange treatments and heat-treatments for drying and calcination. These low-temperature fuel cells with proton-conducting zeolite electrolytes are expected to work in a temperature range of about 90-125o Centigrade. With inorganic electrolytes they will generate power using methanol or hydrogen fuel and serve potentially as the power supply for the electric-car Next Generation Vehicle (NGV). In addition to zero-emission automotive applications, they may have commercial application in submarines and other watercraft.

低温质子交换膜（PEM）燃料电池的工作温度范围可以通过使用质子传导无机膜而不是聚合物PEM电解质来增加。 这项小型企业创新研究（SBIR）I期项目将开发用于低温燃料电池中的质子传导，类似膜的沸石。 原型燃料电池也将开发和测试。 沸石中低温离子电导率将通过在沸石晶格中作为阳离子作为阳离子的果实来诱导。 沸石中的阳离子与质子一起放在沸石框架的微观通道，笼子和空腔中。 质子传导沸石中阳离子的结构和化学将通过光谱技术进行研究：扩展的X射线吸收良好结构（EXAFS），X射线吸收近边缘结构（XANES），X射线光电子光谱（XPS）和核磁共振（X-ray光电）和核磁共振（NMR）光谱。 离子电导率将通过AC阻抗和直流电导率测量确定。 通过光谱研究获得的结构和化学信息将用于优化质子传统沸石的化学组成和晶体结构。 在第一阶段，将合成在导电多孔底物上的质子传统的冬日岩和ZSM-5沸石薄膜。 沸石膜将通过铝硅酸盐凝胶的水热结晶制备，然后进行离子交换处理和干燥和钙化的热处理。 这些具有质子导电沸石电解质的低温燃料电池有望在约90-125o摄氏度的温度范围内工作。 使用无机电解质，它们将使用甲醇或氢燃料产生电力，并有可能用作电动汽车下一代车辆（NGV）的电源。 除了零排放汽车应用外，它们还可能在潜艇和其他船只中进行商业应用。