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中文摘要：
PEM燃料电池正常运行时，电池中的质子交换膜应该得到充分润湿。基于Springer模型，推导出膜中磺酸基团所带水分子数沿着膜厚方向的分布方程。考虑膜厚、温度和电流密度等因素的影响，分析膜中水传输的规律，得到了极限状况下膜的润湿状态。结论认为膜越薄越容易自润湿；膜越薄、电流密度越大，则膜自润湿所需时间越短，当膜厚小于15／μm，电流密度大于0．6A/cm^2时，膜自润湿所需时间会急剧减少。结论对于PEM燃料电池的设计和操作具有一定的指导意义。
英文摘要：
The proton exchange membrane could be sufficiently hydrated when a proton exchange membrane fuel cell （PEMFC） operated normally. Based on Springer model, the equation of the distribution of water molecules number bonded with SO4 in the membrane was derived. Considering the effects of the membrane thickness, operating temperature and current density, the water transfer in the membrane was analyzed. Conclusions were drawn that the thinner the membrane can be more easily self-hydrated; the thinner the membrane was and the higher the current density was, the less the time was needed to hy- drate the membrane; when the thickness was less than 15μm and current density was higher than 0.6 A/cm^2, the time was decreased drastically. The conclusions were helpful for PEMFC＇s design and operation.
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