Low methanol permeable composite nafion/silica/pwa membranes for low temperature direct methanol fuel cells
文献类型：期刊论文
| 作者 | Xu, WL; Lu, TH; Liu, CP; Xing, W |
| 刊名 | Electrochimica acta
 |
| 出版日期 | 2005-05-30 |
| 卷号 | 50期号:16-17页码:3280-3285 |
| 关键词 | Nafion Dmfc Methanol Composite electrolytes Proton conductivity |
| ISSN号 | 0013-4686 |
| DOI | 10.1016/j.electacta.2004.12.014 |
| 通讯作者 | Xing, w() |
| 英文摘要 | Nafion/silica/phosphotungstic acid (pwa) composite membranes were studied for low temperature (< 100° c) direct methanol fuel cells (dmfcs). the composite membranes were prepared by sol-gel reaction of tetraethoxysilane (teos) within the nanophase of hydrated perfluorosulfonic acid membranes (nafion 117) and the subsequent treatment in phosphotungstic acid (pwa) solution. x-ray diffraction (xrd) indicates that the silica can decrease the crystallinity of nation. the silica in membranes can greatly decrease the methanol diffusion coefficient (d) within appropriate silica content range. the proton conductivities (or) of these composite membranes are higher than those of commercial nation 117. the result of σ/d shows the optimal silica content in composite membrane is 38.2 μ g/g. thermogravimetric analysis (tga) shows that the incorporation of silica and pwa does not affect the thermostability of membrane. the data from single direct methanol fuel cell using these two membranes of commercial nation without treatment and nafion/silica/pwa composite membranes with optimal silica content as polymer-electrolyte show that the cell with composite membrane has higher open circuit voltage (ocv = 0.75 v) and maximal power density (pmax = 70 mw/cm(2)) than those of commercial nafion without treatment (ocv = 0.68 v, p-max = 62 mw/cm(2)) at 80° c. © 2004 elsevier ltd. all rights reserved. |
| WOS关键词 | OPERATION ; OXIDE ; ACID ; ELECTROOXIDATION ; ELECTROLYTE ; OXIDATION |
| WOS研究方向 | Electrochemistry |
| WOS类目 | Electrochemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000229570300012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377717 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xing, W |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China 2.Nanjing Normal Univ, Dept Chem, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, WL,Lu, TH,Liu, CP,et al. Low methanol permeable composite nafion/silica/pwa membranes for low temperature direct methanol fuel cells[J]. Electrochimica acta,2005,50(16-17):3280-3285. |
| APA | Xu, WL,Lu, TH,Liu, CP,&Xing, W.(2005).Low methanol permeable composite nafion/silica/pwa membranes for low temperature direct methanol fuel cells.Electrochimica acta,50(16-17),3280-3285. |
| MLA | Xu, WL,et al."Low methanol permeable composite nafion/silica/pwa membranes for low temperature direct methanol fuel cells".Electrochimica acta 50.16-17(2005):3280-3285. |
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来源：中国科学院大学
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