Physical theory of pore formation, water transport and proton flow in polymer electrolyte membranes

聚合物电解质膜孔隙形成、水传输和质子流动的物理理论

• 批准号: 311735-2011
• 负责人: Berg, Peter
• 金额: $ 0.7万
• 依托单位: University of Ontario Institute of Technology
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=510049
• 关键词: Physical; theory; pore; formation; water

Polymer electrolyte membranes (PEMs) are used in hydrogen fuel cells as proton conductive media. Their operation is based on structural diffusion of protons in water-filled nanopores, facilitated by an ion exchange mechanism between acidic groups and water. The conductivity depends critically on the pore morphology, the concentration of free protons and their mobility, and the structure of the underlying pore network which emerges from phase separation of the PEM into hydrophobic and hydrophilic domains.

聚合物电解质膜（PEM）在氢燃料电池中用作质子传导介质。它们的操作是基于质子在充满水的纳米孔中的结构扩散，由酸性基团和水之间的离子交换机制促进。电导率主要取决于孔形态、游离质子的浓度及其迁移率以及从PEM相分离成疏水和亲水域而出现的底层孔网络的结构。