Measurement and characterization of water cross-over in PEM fuel cells

PEM 燃料电池中水渗透的测量和表征

• 批准号: 372206-2008
• 负责人: Bi, Xiaotao(Tony)
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=435135
• 关键词: Measurement; characterization; water; cross; over

Fuel cell technology is one of the most promising candidates for achieving the fuel economy and emission reduction goals. One of the key technical callenges for polymer electrolyte membrane (PEM) fuel cells in automotive applications is the water management. The balance of water in a PEM fuel cell is critical to PEM fuel cell operation, and its implications are not yet fully understood. The membrane within a PEM cell needs to be fully hydrated in order to reduce ohmic losses caused by the resistance across the membrane. Thus cell or stack dehydration reduces the proton conductivity of the membrane. Too much water leads to flooding of the cell and which impedes the mass transfer of reactant gases, and block catalyst sites.

燃料电池技术是实现燃油经济性和减排目标的最有前途的候选技术之一。汽车用聚合物电解质膜(PEM)燃料电池的关键技术之一是水管理。质子交换膜燃料电池中水的平衡对质子交换膜燃料电池的运行至关重要，其影响目前还不完全清楚。PEM电池内的膜需要完全水合，以减少膜上的电阻引起的欧姆损失。因此，电池或堆叠脱水降低了膜的质子传导性。过多的水会导致电池泛滥，阻碍反应气体的传质，并堵塞催化剂位置。