具規序結構質子半透膜傳導機制研究; Conducting Mechanism in Proton Exchange Membrane Bearing Ordered Nanostructure

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/46932

Title:	具規序結構質子半透膜傳導機制研究;Conducting Mechanism in Proton Exchange Membrane Bearing Ordered Nanostructure
Authors:	諸柏仁
Contributors:	化學系
Keywords:	化學類
Date:	2010-08-01
Issue Date:	2011-07-13 16:16:04 (UTC+8)
Publisher:	行政院國家科學委員會
Abstract:	中高溫範圍下( 200oC > T >120℃ )操作的質子交換膜電池(PEMFC)為最能實現氫能應用的再生能源技術。但高溫時失水喪失了傳導的介質使導電度喪失。因此開發適於高溫低濕度下操作的質子交換膜成為近年來國際間積極研發的領域。在高溫低濕條件質子可以藉由怎樣的機制傳遞以及怎樣的結構能構建現此一機制到目前為止國際間對中高溫離子傳導材料的結構設計和開發上仍處於混沌不明的狀態。本研究將以三年期規劃研發具有長程規序的新穎質子交換膜材料使用於質子交換燃料電池。主要目的是經由瞭解質子在高溫或低濕時驅動質子傳導的因子，發現可利用的新的機制，以及製備具有恰當的微相型態及酸根分佈之結構開發適用於高溫低濕下操作的新穎膜材。本研究執行之方法是以奈米離子體理論為基礎並配合先前的研究，期望構建具備有新的質子傳輸通道、質子傳導機制及奈米相分離排列結構符合高溫用之新穎質子傳導膜材料。該材料的製作方式採取(1) 團鏈共聚物奈米級次的自組裝(2)有機/無機網狀結構薄膜(3) 高分岐或樹枝狀質子傳導膜三個設計，製作具有長週期性有序結構之膜材。除開發新穎質子導體薄膜，本研究另一方面探索奈米自組裝分子薄膜所構建的超分子結構以及其對離子導電機制，分子運動質和阻隔燃料現象之影響進行深入探討。研究目標在利用此一規序性之離子導體排列結構來達成低含水量或無水狀態下的高質子導電度。新的質子傳導機制之發以及可操控之奈米微相分離結構為兩大突破關鍵。本三年期計畫研究將規劃以下主題進行探討: I. 團鏈共聚物奈米級次的自組裝質子交換膜： II. 有機/無機網狀結構材料的高溫低濕半透膜 III.高分岐(Hyperbranch)及樹狀(Dendrimer based)高溫低濕半質子透膜 IV. 高溫低濕環境下之質子傳遞機制研究 V. 原位(in-situ)固態核磁共振檢測本提案研究以全新之材料設計觀念構建之高分子質子半透膜，將產生衝擊性極大的基礎學術研究成果以及創新之智慧財產。 Proton exchange membrane Fuel cells (PEMFC) operating at the mid-to-high temperature range (200oC>T>120oC) is considered to be the most promising fuel cell technology to deliver clear renewable energy using hydrogen. However the loss of conductivity due to the loss of conducting medium at elevated temperature hampered the progress. Development of membrane materials suitable for fuel cell to operating under this temperature range is critical and has attracted new thrust of research. However, what can be the new proton conducting mechanism without a fluid medium, and what polymer membrane structure characteristics that can provide such new conducting mechanism, remain largely un-resolved. This proposal disclose the design of series of proton exchange membrane bearing phase separated nano-structures arranged in long range order as the plausible candidate for novel proton conducting membrane to operate at mid-to high temperature range. The purpose of the study is to first understand the factors contributing to proton conduction with low fluidity content, then to discover the mechanism that proton can transport under high temperature or low humidity, and finally to prepare membranes with structure characteristics (acid group distribution or chain motion) required to establish such novel proton conducting mechanism without fluid medium. This approach is based on the theory of nano-ionics and results condensed from prior researches, where novel proton conducting channel, new proton conducting mechanism can be expected from nano-phase separated domains bearing long range order. Three designs with nano-structures are explored: (1) long range ordered domains by block-copolymer, (2) Organic-inorgainc composites with long range rdered inorganic nano domain, and (3) Proton conducting membranes with highly dispersed Hyperbranched ad Dendrimer nano-domains. In addition to prepare the membrane suitable to operating at high temperature and low humidity, the proposal also devoted to the study of novel proton conducting behaviors in these ordered nano-structures under high temperature and low-humidity conditions, with the goal to achieve high proton conductivity in these novel nano-structured membranes at low humidity and high temperature. The major challenges in this proposal are to establish the necessary and suitable nano-structures, and to unveil the new proton conducting mechanism at low humidity in these nano-structured membranes. For this purpose, five major tasks are planned on to carry out in the next three years: I. Self assembly block copolymers membranes bearing long range ordered nano-domain phase separation. II. Organic-inorganic net-work composite proton conducting membranes with ordered inorganic domains operating at high temperature and low humidity. III. Low humidity proton conducting membranes with highly dispersed Hyperbranched ad Dendrimer nano-domains. IV.Proton conducting mechanisms under high temperature and/or low humidity. V. In-situ Solid state NMR characterizations of Membrane Electrode Assembly (MEA). These high temperature and low humidity proton conducting membranes based on novel structure design and new working principles are promising to impose huge impact on fundamental research and to generate original intellectual property that can prompt rapid progress of fuel cell adaptation. 研究期間：9908 ~ 10007
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Department of Chemistry] Research Project

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