JP2022068246A - 炭素ナノ繊維紡糸層を含む燃料電池用ガス拡散層を準備する方法 - Google Patents
炭素ナノ繊維紡糸層を含む燃料電池用ガス拡散層を準備する方法 Download PDFInfo
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Abstract
Description
ポリアクリロニトリル(PAN)100gにジメチルアセトアミド(DMAc)900gを入れて溶解させ、高分子紡糸溶液(濃度:10wt%)を製造した。
電界紡糸装置の高分子紡糸溶液の供給容器内の温度を45℃に恒温制御したことを除いては、前記実施例1-1と同様の過程でガス拡散層を製造した。
電界紡糸装置の高分子紡糸溶液の供給容器内の温度を35℃に恒温制御したことを除いては、前記実施例1-1と同様の過程でガス拡散層を製造した。
電界紡糸装置の高分子紡糸溶液の供給容器内の温度を25℃に恒温制御したことを除いては、前記実施例1-1と同様の過程でガス拡散層を製造した。
前記実施例1-1にて製造された炭素ナノ繊維紡糸層を熱処理してガス拡散層を製造した。第1の温度区間を有する第1のヒーター内に前記実施例1-1にて製造された炭素ナノ繊維紡糸層を導入することにより、前記ナノ繊維フィルムの環化反応が起こった安定化したナノ繊維フィルムを製造した。前記第1の温度区間は、300±30℃まで順次上昇する区間である。
炭素ナノ繊維紡糸層として前記実施例2-1にて製造された炭素ナノ繊維紡糸層を用いたことを除いては、前記実施例1-2と同様の過程でガス拡散層を製造した。
炭素ナノ繊維紡糸層として前記実施例3-1にて製造された炭素ナノ繊維紡糸層を用いたことを除いては、前記実施例1-2と同様の過程でガス拡散層を製造した。
炭素ナノ繊維紡糸層として前記実施例4-1にて製造された炭素ナノ繊維紡糸層を用いたことを除いては、前記実施例1-2と同様の過程でガス拡散層を製造した。
電解質膜は、パーフルオロスルホン酸ポリマーであるデュポン社のナフィオン膜(Nafion 112)を用いた。触媒インクを製造するため、アノードとカソード触媒として白金担持カーボン触媒(Pt/C)を用いた。ナフィオン(Nafion)溶液、イソプロピルアルコールと水を混合し、前記触媒と混ぜて触媒:nafion乾燥重量:溶媒=1:0.3:20になるようにした後、よく分散されるように攪拌して、高速ミキサー(2時間)で均一に混合して触媒インクを用意した。
前記実施例1-3に従って製造した電解質膜の両面に、前記実施例1-2に従って製造されたガス拡散層を重ねた後、膜-電極接合体を中心に、ガスの気密性を維持するための210μmのガスケットを、電極部分を除いた高分子電解質の部分に密着させて、膜-電極接合体に水素の投入及び均一な圧力を与えるための流路を有する負極用板と、空気の投入及び膜-電極接合体に均一な圧力を与えるための陽極用板を密着させて単位電池を製造した。
前記実施例2-2にて製造されたガス拡散層をガス拡散層として用いたことを除いては、前記実施例1-4と同様の過程で単位電池を製造した。
前記実施例3-2いて製造されたガス拡散層をガス拡散層として用いたことを除いては、前記実施例1-4と同様の過程で単位電池を製造した。
前記実施例4-2にて製造されたガス拡散層をガス拡散層として用いたことを除いては、前記実施例1-4と同様の過程で単位電池を製造した。
電界紡糸時、高分子組成物供給容器の温度を制御することなく、室温である25℃に維持したことを除いては、前記実施例1-1と同様の過程で横25cm、縦45cm、厚さ100μmの炭素ナノ繊維紡糸層を製造した。
前記比較例1-1に従って製造された炭素ナノ繊維紡糸層を用いたことを除いては、前記実施例1-2と同様の過程でガス拡散層を製造した。
前記実施例1-3と同様の過程で電解質膜を製造した。
前記比較例1-1に従って製造された炭素ナノ繊維紡糸層を用いて造られたガス拡散層を用いたことを除いては、前記実施例1-4と同様の過程で単位電池を製造した。
前記実施例1-2及び比較例1-2の方法に従って造られたガス拡散層の微細構造を日立社で製造された製品名SU-70の電界放出型走査電子顕微鏡装置(FE-SEM;Field Emission Scanning Electron Microscopy )を使用して撮影し、それぞれ図1および図2に示した。
本発明に係る燃料電池の性能を比較するために、下記の条件の下、単位電池の性能を測定した。
相対湿度:80%
電池温度:65℃
ガス供給:アノード-水素/カソード-空気
測定装置:CNL社の燃料電池性能TEST STATION
電解質膜の表面積:25cm2
電界紡糸装置の高分子紡糸溶液の供給容器内の温度を25℃に恒温制御したことを除いては、前記実施例1-1と同様の過程でガス拡散層を製造した。
Claims (6)
- 炭素ナノ繊維紡糸層を含む燃料電池用ガス拡散層であって、
前記炭素ナノ繊維紡糸層は、高分子組成物を電界紡糸して形成したものである、燃料電池用ガス拡散層。 - 前記電界紡糸は、30kV~70kVの電圧を印加するものである、請求項1に記載の燃料電池用ガス拡散層。
- 前記電界紡糸は、40℃~80℃の温度下で行われるものである、請求項1に記載の燃料電池用ガス拡散層。
- 前記炭素ナノ繊維紡糸層は、前記電界紡糸によって形成された炭素ナノ繊維紡糸層を熱処理したものである、請求項1に記載の燃料電池用ガス拡散層。
- 電解質膜と、
前記電解質膜を挟んで互いに対向して位置するアノード電極とカソード電極と、を含み、
前記アノード電極とカソード電極は、ガス拡散層及び触媒層を含み、
前記ガス拡散層は、請求項1~4のいずれかに記載の燃料電池用ガス拡散層である、燃料電池用膜-電極接合体。 - 一つまたは二つ以上の請求項5に記載の膜-電極接合体と前記膜-電極接合体間に介在するセパレータを含むスタックと、
燃料を前記スタックに供給する燃料供給部と、
酸化剤を電気発生部に供給する酸化剤供給部を含む、燃料電池。
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JP6027187B2 (ja) * | 2015-05-25 | 2016-11-16 | 財團法人工業技術研究院Industrial Technology Research Institute | 燃料電池および炭素複合構造 |
KR102042463B1 (ko) * | 2015-07-29 | 2019-12-02 | 주식회사 엘지화학 | 다공성 박막에 전기방사법으로 섬유상 코팅층을 도입한 분리막의 제조 방법 및 이로부터 제조되는 분리막 |
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2017
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2018
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JP2012033320A (ja) * | 2010-07-29 | 2012-02-16 | Nisshinbo Holdings Inc | 燃料電池用電極 |
JP2014098218A (ja) * | 2012-11-14 | 2014-05-29 | Industrial Technology Research Institute | 燃料電池、炭素複合構造、およびその作製方法 |
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CN110800145A (zh) | 2020-02-14 |
JP2020526001A (ja) | 2020-08-27 |
KR102018913B1 (ko) | 2019-11-04 |
KR20190001557A (ko) | 2019-01-04 |
KR101984472B1 (ko) | 2019-05-31 |
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WO2019004712A1 (ko) | 2019-01-03 |
KR102018914B1 (ko) | 2019-09-05 |
WO2019004711A1 (ko) | 2019-01-03 |
US20190237778A1 (en) | 2019-08-01 |
US20200127306A1 (en) | 2020-04-23 |
JP2020526002A (ja) | 2020-08-27 |
CN110800144A (zh) | 2020-02-14 |
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