成果報告書詳細
管理番号20110000000286
タイトル*平成20年度中間年報 新エネルギー技術研究開発/新エネルギーベンチャー技術革新事業(燃料電池・蓄電池)/電子制御不要の燃料供給装置を用いた高効率携帯用小型燃料電池システムの開発
公開日2011/5/17
報告書年度2008 - 2008
委託先名国立大学法人群馬大学 株式会社ケミックス
プロジェクト番号P10020
部署名研究開発推進部
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 出力20W程度のポータブル発電機のプロトタイプの開発を目指した。フェーズ1の成果であるパッシブDMFCの性能に基づき、厚さ5mm、電極高さ50mm程度の薄型単セルを積層スタック化した積層型パッシブDMFCスタックのプロトタイプ構築を目指した。開発するプロトタイプの用途としては、ある特殊場での稼動用電源を想定した。そこでは、可搬性、長時間駆動、燃料交換時の利便性が求められることから、90~99.5%程度の高濃度メタノールを燃料とし、平均出力20W程度で、一度の燃料供給で72時間以上連続運転可能なポータブル小型DMFCとした。
英文要約For the purpose of creating a potable DMFC system that employs a novel electrode structure in DMFC with porous carbon plate (PCP) and efficiently use methanol with high concentrations, structural design of a unit cell, a short stack that consisted of 5cells and a full stack with 30 cells, and their power generation characteristics were investigated in a stepwise fashion. For a 20W DMFC system, a single cell with 300mm2 (50mm x 60mm) electrode area and with 5mm in thickness was designed by employing a porous carbon plate that we have used in this project. The power density obtained from the single cell did not reach to that of our target, 30mW/cm2, because the PCP with 300mm2 area did not have enough resistivity for methanol transport through it. Then, we focused on an improvement of PCP for large area size. Another type of PCP that was produced by another preparation method was employed as used. Due to the improvement of PCP, single cell performance with the new PCP could reach to 38mW/cm2 with 100% methanol. The performance was higher than that of the target. Based on the structure and performance of the single cell, a short-stack with 5 single cells were designed and manufactured. The power output was 5.8W (38mW/cm2) at 2V with 100% methanol as fuel. It was higher than 30mW/cm2 then achieved our target. Based on the success of the short stack in the design and performance, a full-stack consisted of 30 single cells was designed and manufactured. The power generation characteristics of the full stack was tested and confirmed that the power out put was over 30W with 100% methanol as an initial performance. It was observed that heat produced at the stack increase its temperature and suggested that a proper cooling mechanism of the stack is necessary in the DMFC system.
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