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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林祥泰(Shiang-Tai Lin) | |
dc.contributor.author | Chung-Min Lin | en |
dc.contributor.author | 林崇民 | zh_TW |
dc.date.accessioned | 2021-06-13T01:24:06Z | - |
dc.date.available | 2007-07-30 | |
dc.date.copyright | 2007-07-30 | |
dc.date.issued | 2007 | |
dc.date.submitted | 2007-07-18 | |
dc.identifier.citation | 1. Wang, C.Y., Fundamental models for fuel cell engineering. Chemical Reviews, 2004. 104(10): p. 4727-4765.
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Archdale, Li-ion batteries and portable power source prospects for the next 5-10 years. Journal of Power Sources, 2004. 136(2): p. 386-394. 9. Dyer, C.K., Fuel cells for portable applications. Journal of Power Sources, 2002. 106(1-2): p. 31-34. 10. Zerbinati, O., A. Mardan, and M.M. Richter, A direct methanol fuel cell. Journal of Chemical Education, 2002. 79(7): p. 829-831. 11. Kuver, A. and W. Vielstich, Investigation of methanol crossover and single electrode performance during PEMDMFC operation - A study using a solid polymer electrolyte membrane fuel cell system. Journal of Power Sources, 1998. 74(2): p. 211-218. 12. Wasmus, S. and A. Kuver, Methanol oxidation and direct methanol fuel cells: a selective review. Journal of Electroanalytical Chemistry, 1999. 461(1-2): p. 14-31. 13. Chen, C.Y. and P. Yang, Performance of an air-breathing direct methanol fuel cell. Journal of Power Sources, 2003. 123(1): p. 37-42. 14. Bae, B., et al., Performance evaluation of passive DMFC single cells. Journal of Power Sources, 2006. 158(2): p. 1256-1261. 15. Desai, S. and M. Neurock, A first principles analysis of CO oxidation over Pt and Pt66.7%Ru33.3% (111) surfaces. Electrochimica Acta, 2003. 48(25-26): p. 3759-3773. 16. Thomas, S.C., X. Ren, and S. Gottesfeld, Influence of ionomer content in catalyst layers on direct methanol fuel cell performance. Journal of the Electrochemical Society, 1999. 146(12): p. 4354-4359. 17. Lin, W.F., J.T. Wang, and R.F. Savinell, On-line FTIR spectroscopic investigations of methanol oxidation in a direct methanol fuel cell. Journal of the Electrochemical Society, 1997. 144(6): p. 1917-1922. 18. Hamnett, A., Mechanism and electrocatalysis in the direct methanol fuel cell. Catalysis Today, 1997. 38(4): p. 445-457. 19. Page, T., et al., A study of methanol electro-oxidation reactions in carbon membrane electrodes and structural properties of Pt alloy electro-catalysts by EXAFS. Journal of Electroanalytical Chemistry, 2000. 485(1): p. 34-41. 20. Liu, L., et al., Carbon supported and unsupported Pt-Ru anodes for liquid feed direct methanol fuel cells. Electrochimica Acta, 1998. 43(24): p. 3657-3663. 21. Ravikumar, M.K. and A.K. Shukla, Effect of methanol crossover in a liquid-feed polymer-electrolyte direct methanol fuel cell. Journal of the Electrochemical Society, 1996. 143(8): p. 2601-2606. 22. Gurau, B. and E.S. Smotkin, Methanol crossover in direct methanol fuel cells: a link between power and energy density. Journal of Power Sources, 2002. 112(2): p. 339-352. 23. Ye, Q., et al., Electrochemical reactions in a DMFC under open-circuit conditions. Electrochemical and Solid State Letters, 2005. 8(1): p. A52-A54. 24. Kauranen, P.S. and E. Skou, Mixed methanol oxidation oxygen reduction currents on a carbon supported Pt catalyst. Journal of Electroanalytical Chemistry, 1996. 408(1-2): p. 189-198. 25. Kamarudin, S.K., et al., Overview on the challenges and developments of micro-direct methanol fuel cells (DMFC). Journal of Power Sources, 2007. 163(2): p. 743-754. 26. Lim, C. and C.Y. Wang, Development of high-power electrodes for a liquid-feed direct methanol fuel cell. Journal of Power Sources, 2003. 113(1): p. 145-150. 27. Schaffer, T., et al., Introduction of an improved gas chromatographic analysis and comparison of methods to determine methanol crossover in DMFCs. Journal of Power Sources, 2005. 145(2): p. 188-198. 28. Blum, A., et al., Water-neutral micro direct-methanol fuel cell (DMFC) for portable applications. Journal of Power Sources, 2003. 117(1-2): p. 22-25. 29. Liu, W.P. and C.Y. Wang, Modeling water transport in liquid feed direct methanol fuel cells. Journal of Power Sources, 2007. 164(1): p. 189-195. 30. Oliveira, V.B., et al., A comparative study of approaches to direct methanol fuel cells modelling. International Journal of Hydrogen Energy, 2007. 32(3): p. 415-424. 31. Cheddie, D. and N. Munroe, Review and comparison of approaches to proton exchange membrane fuel cell modeling. Journal of Power Sources, 2005. 147(1-2): p. 72-84. 32. Dohle, H. and K. Wippermann, Experimental evaluation and semi-empirical modeling of U/I characteristics and methanol permeation of a direct methanol fuel cell. Journal of Power Sources, 2004. 135(1-2): p. 152-164. 33. Guo, H. and C.F. Ma, 2D analytical model of a direct methanol fuel cell. Electrochemistry Communications, 2004. 6(3): p. 306-312. 34. Chen, R. and T.S. Zhao, Mathematical modeling of a passive-feed DMFC with heat transfer effect. Journal of Power Sources, 2005. 152(1): p. 122-130. 35. Kulikovsky, A.A., The voltage-current curve of a direct methanol fuel cell: 'exact' and fitting equations. Electrochemistry Communications, 2002. 4(12): p. 939-946. 36. Silva, V.S., et al., Performance and efficiency of a DMFC using non-fluorinated composite membranes operating at low/medium temperatures. Journal of Power Sources, 2005. 145(2): p. 485-494. 37. Jiang, R.Z. and D.R. Chu, Comparative studies of methanol crossover and cell performance for a DMFC. Journal of the Electrochemical Society, 2004. 151(1): p. A69-A76. 38. Garcia, B.L., et al., Mathematical model of a direct methanol fuel cell. Journal of Fuel Cell Science and Technology, 2004. 1(1): p. 43-48. 39. Scott, K., et al., Limiting current behaviour of the direct methanol fuel cell. Electrochimica Acta, 1999. 45(6): p. 945-957. 40. Scott, K., W.M. Taama, and P. Argyropoulos, Engineering aspects of the direct methanol fuel cell system. Journal of Power Sources, 1999. 79(1): p. 43-59. 41. Scott, K., W. Taama, and J. Cruickshank, Performance and modelling of a direct methanol solid polymer electrolyte fuel cell. Journal of Power Sources, 1997. 65(1-2): p. 159-171. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/29903 | - |
dc.description.abstract | 近年來由於能源危機的產生,並且能源持續的消耗也造成自然環境的污染破壞,使得找尋可替代性的綠色能源成為人類的重要課題,其中直接甲醇燃料電池的前景頗被看好。而直接甲醇燃料電池目前還面臨許多問題有待解決,如甲醇燃料會透過膜向陰極滲透(crossover)造成電池電壓下降、甲醇燃料的浪費、甲醇氧化速率緩慢、電池的發電效率、水及熱管理等等…。因此建立一個準確而且計算方便的模型來描述燃料電池的運作情形,對電池的研發至為重要。
在本研究中,我們建構一個甲醇燃料電池的數學模型,並推導得出其解析解。在透過此模型中,我們考慮在恆溫操作下,甲醇燃料電池穩定運作時的物質平衡,並藉此得到電池的各種特性,包括各種物質(如燃料)在電池內部的濃度分佈及流通量(flux),電池的放電現象(完整的I-V極化曲線)以及電池的放電功率及操作效率,瞭解到對於不同純甲醇進料量時電池有不同的表現以及水分的管理。本模型與文獻中其他模型之最大不同之處,在於我們能夠計算甲醇燃料電池在未使用時(open circuit)的漏電情形。此模型所用到的參數(共43個),大多由電池的結構與操作條件決定,僅有7個(電子傳遞係數、材料界面電阻、孔隙度、觸媒層厚度、氧氣擴散係散)是透過迴歸實驗數據而得。我們用三種不同的實驗數據(包括不同的電池構造,不同的操作溫度及甲醇濃度),發現都可以得到很好的描述,證明此模型的可靠性。利用此模型,我們可以了解電化學反應、物質在電池中的質傳現象包括甲醇透過膜的滲透(crossover)、以及反應物在各電極層間的傳遞現象會如何影響電池的整體表現。這些知識將有助於我們尋找進一步改善及提升甲醇燃料電池效能的關鍵。 | zh_TW |
dc.description.abstract | It has become an important issue to search for alternative energy source due to energy crisis and pollution of the natural environment in recent years. Direct methanol fuel cell (DMFC) is one of the attractive energy supplies. There are some technical challenges for DMFC such as low efficiency due to methanol crossover, low methanol oxidation rate, low power density, and the need for excessive water and heat management, etc. For a better description of the cell operation and optimization of performance, it would be important to develop an accurate and quick mathematical model for DMFC.
In this research, a 2D analytical mathematical model of a direct methanol fuel cell was developed to describe not only electrochemical reactions on the anode and cathode electrodes, but also transport phenomena within the fuel cell, operating isothermally at steady state. One could use this model to understand the cell performance such as polarization curve, efficiency, power density and concentration profile. Further, we could predict cell performance and understand how to deal water management when methanol input concentration changes. Compared with other models in the literature, our model allows for prediction of the open circuit voltage of the DMFC. This model contains forty three parameters; most of them are decided by cell structure and operation condition. Only seven parameters(transfer coefficient of electron、resistance of material interface、porosity、thickness of catalyst layer and diffusion coefficient of oxygen) are obtained by regressing to experiment data. The theoretical prediction was in good agreement with experiments from three different fuel cells (including different cell structure, operating condition). This indicates that this model is robust and reliable. With this model, one could better understand electrochemical reactions and mass transport phenomena in fuel cell, including methanol crossover and reactant transport in membrane electrode assembly (MEA), and how these phenomena affect cell performance. The knowledge provided from such an analytical model may help one search for the key factors to improve DMFC performance. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T01:24:06Z (GMT). No. of bitstreams: 1 ntu-96-R94524071-1.pdf: 2646793 bytes, checksum: a4e12b03cac96de1eaec02699efb00c1 (MD5) Previous issue date: 2007 | en |
dc.description.tableofcontents | 誌謝 I
中文摘要 II Abstract III 目錄 IV 圖索引 V 表索引 VI 1. 緒論 1 1.1 研究背景簡介 1 1.2 燃料電池的特點 1 1.3 燃料電池的種類 2 1.4 直接甲醇燃料電池 3 2. 直接甲醇燃料電池工作原理與概況 6 2.1. 直接甲醇燃料電池工作原理 6 2.2. 甲燃料電池技術挑戰 7 2.3. Modeling的重要 9 3. 數學模型的建立 11 3.1. 基本假設 11 3.2. 數學模型建立原理與方程式 12 3.2.1 陽極半反應部分 13 3.2.2 陰極半反應部分 17 3.3. 電池整體表現 20 3.3.1 關於開環電路 21 3.3.2 濃度分佈 23 3.4. 模型參數 24 4. 結果與討論 29 4.1. I-V polarization curve 29 4.2. 開環電路電壓、極限電流之預測 33 4.3. 電池的發電功率與放電效率 34 4.4. 燃料於電池內部的分佈 38 4.5. Methanol Crossover與內電流 40 4.6. Methanol crossover and Faraday efficiency 45 4.7. 關於水管理 47 5. 結論 52 參考文獻 54 附錄 57 | |
dc.language.iso | zh-TW | |
dc.title | 直接甲醇燃料電池的解析解模型 | zh_TW |
dc.title | Analytical model of Direct Methanol Fuel Cell | en |
dc.type | Thesis | |
dc.date.schoolyear | 95-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 何國川(Kuo-Chuan Ho),李泓智(Hung-Chih Li) | |
dc.subject.keyword | 甲醇燃料電池,解析解,模型, | zh_TW |
dc.subject.keyword | DMFC,analytical model, | en |
dc.relation.page | 70 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2007-07-18 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
顯示於系所單位: | 化學工程學系 |
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