发明授权
- 专利标题: Structures of the proton exchange membranes with different molecular permeabilities
- 专利标题(中): 具有不同分子渗透性的质子交换膜的结构
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申请号: US10864546申请日: 2004-06-10
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公开(公告)号: US07527887B2公开(公告)日: 2009-05-05
- 发明人: Jong-Pyng Chen , Jen-Luan Chen , Chih-Jer Shih , Chih-Yuan Chen
- 申请人: Jong-Pyng Chen , Jen-Luan Chen , Chih-Jer Shih , Chih-Yuan Chen
- 申请人地址: TW Hsinchu
- 专利权人: Industrial Technology Research Institute
- 当前专利权人: Industrial Technology Research Institute
- 当前专利权人地址: TW Hsinchu
- 代理机构: Muncy, Geissler, Olds & Lowe, PLLC
- 优先权: TW93103839A 20040218
- 主分类号: H01M8/10
- IPC分类号: H01M8/10
摘要:
The invention relates to the structures of proton exchange membranes with different molecular permeabilities, especially to the proton exchange membranes suitable for the applications in Direct Methanol Fuel Cell (DMFC) and with the function of recovering water from the cathode. The polymeric structures are the designs of phase separated structures of the crystalline phase and the amorphous phases, thereby limiting the swelling of the materials and the space of ionic cluster structures in nano-scale to reduce the permeability of methanol fuels On the other hand, by controlling of polymeric grafting reactions result in the reverse (from the cathode to the anode) permeability of the product water molecules on the cathode in the proton exchange materials greater than the permeability of methanol molecules in the fuels (from the anode to the cathode) due to the differences of fuel concentrations between the cathode and the anode of DMFC. Hence, it has the function of recovering water of the cathode and does not have the over-permeable phenomena as seen in methanol molecule.