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標題: | 無白金奈米電觸媒用於染料敏化太陽能電池 Pt-Free Nanostructural Electrocatalysts for Dye-Sensitized Solar Cells |
作者: | Yi-June Huang 黃奕鈞 |
指導教授: | 何國川(Kuo-Chuan Ho) |
關鍵字: | 對電極,染料敏化太陽能電池,電觸媒,電解質,無白金,無透明氧化金屬, Counter electrodes,dye-sensitized solar cells,electro-catalyst,electrolyte,Pt-free,TCO-free, |
出版年 : | 2019 |
學位: | 博士 |
摘要: | 本研究論文主要針對無”白金”對電極進行系統性的開發,與設計新型不含”透明導電氧化基材”,應用於低成本、高效率之染料敏化太陽能電池。本研究論文主要可分為兩大部分:(1)無白金對電極(第三章和第四章);(2)無白金和無透明導電氧化基材對電極(第五章和第六章)。
無白金對電極之開發主要目的為降低染敏電池之製造成本,透過簡單、非真空、低成本的製程製備多種電催化觸媒材料,用以完全取代昂貴的白金材料。因此,本研究論文首先以碘系統電解質為標準,進行三大類的無白金複合對電極之開發。(一)過渡金屬化合物型:包含第三章中的二硒化鈷/三氧硒化鈷之奈米方體、奈米棒狀、奈米顆粒;第四章中的二硒化鈷/三氧硒化鈷之複合奈米海膽狀結構。(二) 過渡金屬/導電高分子型:包含硒化鉬奈米片/PEDOT:PSS複合薄膜於第五章,可提供高表面積、快速電解質滲透、良好的附著力、快速碘離子還原反應。(三) 碳材型:純碳氣凝膠於第六章被討論,該材料被前驅物間苯二酚(R)/甲醛(F)和間苯二酚(R)/碳酸鈉(C)的摩耳比控制比表面積。無白金和無透明導電氧化基材對電極中,鈦板與碳氣凝膠用來取代透明導電氧化基材,因為它們的低成本、容易製備與易量產化,(一)鈦板與硒化鉬奈米片/PEDOT:PSS複合薄膜搭配應用於染敏中具有8.51 ± 0.05%的效率,高於白金於鈦板上的效率8.21 ± 0.02%。(二)碳氣凝膠取代整個傳統對電極 (白金/透明導電氧化層/玻璃基材),該染敏電池與CA-C CE搭配下,有著效率9.08 ± 0.01%,高於其他碳氣凝膠。總而言之,本研究論文開發三種無白金複合奈米薄膜:二硒化鈷/三氧硒化鈷、硒化鉬奈米片/PEDOT:PSS、碳氣凝膠,為可取代白金之替代材料,因為他們皆具有良好的催化碘還原能力、低成本、簡易製程、易於大面積製備等特性。 This dissertation aimed to systematically study Pt-free and TCO-free counter electrodes (CEs) with low-costs and highly cell efficiencies (η’s). This dissertation is divided into two parts: (1) Pt-free CEs (Chapter 3 and Chapter 4) and (2) Pt-free and TCO-free CEs (Chapter 5 and Chapter 6). In the case of Pt-free CEs, we aim to reduce the costs of the DSSCs using various electro-catalysts for completely replacing the expensive Pt via the simple, non-vacuum, and low-cost fabrication processes. Accordingly, three types of Pt-free composite films were studied using a standard iodide electrolyte. (I) Transition metallic compound-type CEs, i.e. CoSe2/CoSeO3 with nanocube (NC), nanorod (NR), and nanoparticle (NP) structures in Chapter 3, the composite films of CoSe2/CoSeO3 with hierarchical urchin-like structure in Chapter 4, were indivitually investigated. In the composite film, the different nanostructures were separately used to provide attractive electro-catalytic abilities and large active areas for I3- reduction. (II) Transition metallic and conducting polymer type CEs, i.e. MoSe2 NS/PEDOT:PSS in Chapter 5, were investigated to provide large surface area, fast eletrolyte penetration, well adhesion, and rapid reaction rate for I3- reduction. (III) Carbonaceous-type CEs, i.e. pristine monolithic carbon aerogel (CA-O, CA-Q, CA-F, CA-C, and CA-G) in Chapter 6, were investigated by controlled resorcinol (R)/formaldehyde (F) and resorcinol (R)/sodium carbonate (C) molar ratios. In the case of Pt-free and TCO-free CEs. In the case of Pt-free and TCO-free CEs, the classic TCO substrate is replaced by Ti foil and carbon aerogel for low-cost, simple preparation process, and large-scale production. (I) Ti foil substrate collocate with MoSe2 NS/PEDOT:PSS, which presents a higher η of 8.51 ± 0.05%, as compared to a lower η of 8.21 ± 0.02% using the Pt-coated Ti foil CE. (II) Carbon aerogel replace traditional CEs based on the Pt/FTO/glass in DSSCs. The DSSCs using the as-prepared CA-C CE gave the best η of 9.08 ± 0.01%, among all the CA CEs. In brief, this dissertation explores three Pt-free composite films of CoSe2/CoSeO3, MoSe2 NS/PEDOT:PSS, and CA are a promising substitutions of Pt due to their outstanding properties, i.e., good electro-catalytic ability for I3– reduction, low-cost, simple preparation process, and easy for large-scale production. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/73624 |
DOI: | 10.6342/NTU201903935 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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