成果報告書詳細
管理番号20110000001104
タイトル*平成22年度中間年報 固体高分子形燃料電池実用化推進技術開発 次世代技術開発 極限構造化した炭化水素系高分子電解質の包括的研究開発
公開日2011/10/12
報告書年度2010 - 2010
委託先名学校法人上智学院
プロジェクト番号P10001
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等 2020年以降の燃料電池自動車等の本格商用化に求められるPEFCの格段の高信頼性化・低コスト化のために、革新的な機能を有する炭化水素系高分子電解質の包括的研究開発を行う。 本年度は、プロジェクト全体目標に対して、次の研究項目を検討した。 (1) 高い物質移動性を発現する極限化構造の構築 本研究グループで開発したブロック共重合体構造からなる炭化水素系高分子電解質をもとに、これを高IEC化、高密度化、ブロック構造の極限化を施すことで、プロトン伝導性のさらなる向上を図った。
英文要約Title : Development of PEFC Technologies aiming for Practical Application/Development of Technology for Next-Generation Fuel Cells/Comprehensive Research of Novel Hydrocarbon Polymer Electrolytes with Innovative Functions (FY2010-2012) FY2010 Annual Report
1. Abstract
The purpose of this project is to develop novel polymer electrolytes based on hydrocarbon polymer materials for the full-scale commercialization of fuel cell vehicles on and after FY2020. In this term, we have investigated the following three-points according to the research program.
2. Result and Discussions
(1) Development of extreme structures providing high mass transportation
We tried to improve proton conductivity of polymer electrolytes under low humidities and elevated temperatures by increasing ion exchange capacity (IEC) and developing the extreme structures. In this term, the low molecular weight monomer containing a sulfonic acid group was synthesized and was polymerized by Ni(0) coupling polymerization. The obtained S-PrPBP had high water resistance and film processability even with an IEC = 3.3 meq/g.
Fuel cell performance tests under low humidities and elevated temperatures were carried out with the developed block copolymer electrolytes (S-6H (14) 3:1), which consisted of hydrophobic blocks of polyaryletherketon and hydrophilic blocks of sulfonated poly(4-phenoxybenzoyl-1,4-phenylene). The S-6H (14) 3:1 membranes exhibited relatively higher fuel cell performances than those of sulfonated poly(4-phenoxybenzoyl-1,4-phenylene) homopolymers up to 135°C.
(2) Development of extreme structures providing high stability
We studied the catalyst transfer polycondensation to control molecular weights and distributions of polymer electrolytes. New monomers, 1,4-dibromo-2,5-dihexyloxybenzene (DBDB) and 1,4-di[4-(2,2-dimetylpropoxysulfonyl)phenyl]butoxybenzene (NS-DPB), were synthesized to achieve high molecular weight materials by the catalyst transfer polycondensation. Poly(2,5-dihexyloxy-1,4-benzene)s (PDHB) with a Mn = 30000 and a Mw/Mn = 1.2 were synthesized, indicating that the catalyst transfer polycondensation of DBDB had a molecular weight controllability. Poly(1,4-di[4-(2,2-dimetylpropoxysulfonyl)phenyl]butoxybenzene)s were polymerized from NS-DPB in the same manner. Furthermore, the diblock copolymers with PDHB and NS-DPB blocks were successfully prepared by our optimized method.
(3) Development of hydrocarbon based ionomers offering technical advantages
We also developed hydrocarbon based ionomers by using the catalyst transfer polycondensation. These ionomers had not only controlled molecular weights and distributions but also end group selectivity. Triblock copolymers, (NS-PDPB)-PDHB-(NS-PDPB) and PDHB-(NS-PDPB)-PDHB, were successfully synthesized by our optimized methods. While the PDHB-(NS-PDPB)-PDHB had a Mn = 35200, a Mw = 38700, and a Mw / Mn = 1.10, (NS-PDPB)-PDHB-(NS-PDPB) had a Mn = 34900, a Mw = 40000, and a Mw / Mn = 1.15. These results suggest that the end groups of block copolymers can be chemoselectively-introduced to block copolymers.
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