JP2015050088A - 燃料電池の膜電極接合体 - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
【解決手段】高分子電解質膜111と、アノード触媒層112及びカソード触媒層113と、アノードガス拡散層114及びカソードガス拡散層115と、前記高分子電解質膜の前記第1主面上の外縁部又は前記第2主面上の外縁部の少なくとも一方に、その内縁部が前記アノード触媒層又は前記カソード触媒層に重ならないように設けられた額縁状の第1補強層116A,116Bと、前記アノードガス拡散層上の外縁部又は前記カソードガス拡散層上の外縁部の少なくとも前記一方に、その内縁部が重なるように設けられた額縁状の第2補強層117A,117Bと、を備える。
【選択図】 図1
Description
[数1] CH3OH+H2O→CO2+6H++6e−
という酸化反応が生じ、カソードにおいては、
[数2] 1/2O2+6H++6e−→3H2O
という還元反応が生じる。これによりアノードとカソードとの間に電流が流れることになる。
高分子電解質膜111として、縦200mm、横200mm、厚さ125μmのパーフルオロカーボンスルホン酸からなる高分子電解質膜(米国DuPont社製のNafion(商品名,登録商標))を用い、
アノード触媒層112として、縦146mm、横128mm、厚さ40μmの白金・ルテニウム触媒(田中貴金属社製TEC66E50,白金・ルテニウム担持量50重量%)を用い、
カソード触媒113として、縦146mm、横128mm、厚さ20μmの白金触媒(田中貴金属社製TEC10E70TPM,白金担持量70重量%)を用い、
アノードガス拡散層114及びカソードガス拡散層115として、縦146mm、横128mm、厚さ235μmの黒鉛繊維不織布(MFCテクノロジー社製カーボンファイバペーパSIGRACET GDL25BC)を用い、
第1補強層116A,116Bとして、外縁の縦210mm、外縁の横210mm、内縁の縦150mm、内縁の横132mm、厚さ25μmのポリエチレンナフタレートフィルム(帝人デュポンフィルム社製テオネックス)を用い
第2補強層117A,117Bとして、外縁の縦210mm、外縁の横210mm、内縁の縦142mm、内縁の横124mm、厚さ25μmのポリエチレンナフタレートフィルム(帝人デュポンフィルム社製テオネックス)を用いた。
実施例1の比較例として、実施例1の第1補強層116A,116B及び第2補強層117A,117Bを省略したこと以外は実施例1と同じ条件で膜電極接合体11を作製し、同じ評価を行った。この結果、出力密度は86mW/cm2、耐折回数は768回であった。
実施例1及び比較例1の結果から、補強層116A,116B,117A,117Bを省略した比較例1の出力密度は、実施例1の110mW/cm2に比べて86mW/cm2と著しく低い。比較例1の膜電極接合体11を目視で観察したところ触媒層112,113とガス拡散層114,115が最大で1mmずれていたが、これが主たる原因であると推察される。これに対して実施例1の膜電極接合体11については触媒層112,113とガス拡散層114,115のずれは観察されなかった。
11…膜電極接合体
111…高分子電解質膜
112…アノード触媒層(燃料極)
113…カソード触媒層(空気極)
114…アノードガス拡散層
115…カソードガス拡散層
116A,116B…第1補強層
117A,117B…第2補強層
12…アノード集電体
13…カソード集電体
14…アノードセパレータ
15…カソードセパレータ
16…アノード流路
17…カソード流路
18,19…ガスケット
5…ホットプレス機
51…第1熱盤
52…第2熱盤
53…治具
54…位置決め固定用ピン
55…加圧シリンダ
Claims (3)
- 高分子電解質膜と、
前記高分子電解質膜の第1主面及び第2主面のそれぞれに設けられ、前記高分子電解質膜の外縁より小さい外縁を有するアノード触媒層及びカソード触媒層と、
前記アノード触媒層と同じ外縁形状に形成され、当該アノード触媒層上に外縁が揃うように設けられたアノードガス拡散層と、
前記カソード触媒層と同じ外縁形状に形成され、当該カソード触媒層上に外縁が揃うように設けられたカソードガス拡散層と、
前記高分子電解質膜の前記第1主面上の外縁部又は前記第2主面上の外縁部の少なくとも一方に、その内縁部が前記アノード触媒層又は前記カソード触媒層に重ならないように設けられた額縁状の第1補強層と、
前記アノードガス拡散層上の外縁部又は前記カソードガス拡散層上の外縁部の少なくとも前記一方に、その内縁部が重なるように設けられた額縁状の第2補強層と、を備える燃料電池用膜電極接合体。 - 前記第1補強層の材質と前記第2補強層の材質は、異なる材質である請求項1に記載の燃料電池用膜電極接合体。
- 前記第1補強層はポリテトラフルオロエチレンを主成分とし、前記第2補強層はポリエチレンテレフタレート又はポリエチレンナフタレートを主成分とする請求項2に記載の燃料電池用膜電極接合体。
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WO2022116912A1 (zh) * | 2020-12-03 | 2022-06-09 | 中国科学院大连化学物理研究所 | 燃料电池膜电极密封组件、封装工艺以及连续封装用设备 |
CN116864755A (zh) * | 2023-06-23 | 2023-10-10 | 浙江海盐力源环保科技股份有限公司 | 一种高稳定性的燃料电池膜电极 |
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JP2006310288A (ja) * | 2005-04-01 | 2006-11-09 | Matsushita Electric Ind Co Ltd | Mea、meaの製造方法及び高分子電解質形燃料電池 |
JP2007035612A (ja) * | 2005-06-20 | 2007-02-08 | Matsushita Electric Ind Co Ltd | 膜−電極接合体製造方法 |
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JP2006310288A (ja) * | 2005-04-01 | 2006-11-09 | Matsushita Electric Ind Co Ltd | Mea、meaの製造方法及び高分子電解質形燃料電池 |
JP2007035612A (ja) * | 2005-06-20 | 2007-02-08 | Matsushita Electric Ind Co Ltd | 膜−電極接合体製造方法 |
Cited By (3)
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WO2022116912A1 (zh) * | 2020-12-03 | 2022-06-09 | 中国科学院大连化学物理研究所 | 燃料电池膜电极密封组件、封装工艺以及连续封装用设备 |
CN116864755A (zh) * | 2023-06-23 | 2023-10-10 | 浙江海盐力源环保科技股份有限公司 | 一种高稳定性的燃料电池膜电极 |
CN116864755B (zh) * | 2023-06-23 | 2024-05-24 | 浙江海盐力源环保科技股份有限公司 | 一种高稳定性的燃料电池膜电极 |
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