JP2004059428A - 燃料電池用炭素ナノチューブ、その製造法及びそれを採用した燃料電池 - Google Patents
燃料電池用炭素ナノチューブ、その製造法及びそれを採用した燃料電池 Download PDFInfo
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Abstract
【解決手段】 炭素ナノチューブは、分散度が0.3〜5mg/cm2の範囲の金属触媒粒子が内外壁に均一に分散しており、前記ナノチューブの製造法は炭素基板上に化学気相蒸着法またはプラズマ化学気相蒸着法で製造されることを特徴とするが、比表面積が大きくて金属触媒粒子が炭素ナノチューブの内外壁に均一に分散しているため、燃料電池の電極に使用する場合に電極反応の効率を極大化できる炭素ナノチューブ、並びに大表面積の電極を製造でき、工程を単純化できるために経済性に優れて燃料電池の電極にそのまま使用できる製造法、及び既存の燃料電池に比べて燃料電池の性能が格段に向上した燃料電池。
【選択図】 図2
Description
2 石英チューブ
3 反応炉
4 石英ボート
5 基板
6 排出口
7 炭素基板
8 金属触媒粒子
9 炭素ナノチューブ
11 水素イオン交換膜
12 アノード触媒層
13 カソード触媒層
14 アノード支持層
15 カソード支持層
16 カーボンプレート
Claims (13)
- ナノサイズの金属触媒粒子が炭素ナノチューブ内外壁に均一に分散しており、前記触媒粒子の分散度が0.3〜5mg/cm2の範囲であり、炭素基板上に直接成長してなることを特徴とする燃料電池用炭素ナノチューブ。
- 前記金属触媒粒子はPt、Ru、Fe、Co及びそれらの合金よりなる群から選択されたいずれか一つまたはそれらの混合物であることを特徴とする請求項1に記載の燃料電池用炭素ナノチューブ。
- 前記炭素基板は炭素布または炭素紙であることを特徴とする請求項1に記載の燃料電池用炭素ナノチューブ。
- 前記炭素ナノチューブは分岐型であることを特徴とする請求項1に記載の燃料電池用炭素ナノチューブ。
- 炭素基板上に金属触媒を均一に分散させる段階と、
炭素ソース気体を大気圧下で一定流量前記炭素基板に供給して温度400〜900℃で1〜120分間反応させて炭素ナノチューブを製造する段階とを含むことを特徴とする燃料電池用炭素ナノチューブの製造法。 - 前記炭素ソース気体はエチレン、一酸化炭素、二酸化炭素、アセチレンまたはメタンであることを特徴とする請求項5に記載の燃料電池用炭素ナノチューブの製造法。
- 前記炭素基板上に金属触媒を分散させる前処理過程は電気移動法、溶射、スパッタリングまたは化学気相蒸着法であることを特徴とする請求項5に記載の燃料電池用炭素ナノチューブの製造法。
- 前記炭素ソース気体をプラズマ状態とするためにマイクロ波またはラジオ波を加える段階を追加でさらに含むことを特徴とする請求項5に記載の燃料電池用炭素ナノチューブの製造法。
- 前記炭素ナノチューブを分岐型に成長するように調節する段階をさらに含むことを特徴とする請求項5に記載の燃料電池用炭素ナノチューブの製造法。
- 前記炭素ナノチューブを分岐型に成長するように調節する段階は、炭素ナノチューブが成長する途中で反応時間が10分経過した後に還元性気体を使用することを特徴とする請求項9に記載の燃料電池用炭素ナノチューブの製造法。
- 前記還元性気体は水素ガスまたはアンモニアガスであることを特徴とする請求項10に記載の燃料電池用炭素ナノチューブの製造法。
- 前記炭素ナノチューブを分岐型に成長するように調節する段階は、炭素ソース気体の流量、反応温度及び時間を調節することを特徴とする請求項9に記載の燃料電池用炭素ナノチューブの製造法。
- 請求項1ないし4のいずれか1項に記載の炭素ナノチューブを電極に採用したことを特徴とする燃料電池。
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KR1020020044631A KR100759547B1 (ko) | 2002-07-29 | 2002-07-29 | 연료전지용 탄소나노튜브, 그 제조방법 및 이를 채용한연료전지 |
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US20040018416A1 (en) | 2004-01-29 |
CN1472135A (zh) | 2004-02-04 |
US7585584B2 (en) | 2009-09-08 |
KR100759547B1 (ko) | 2007-09-18 |
KR20040011181A (ko) | 2004-02-05 |
US8083905B2 (en) | 2011-12-27 |
CN1240612C (zh) | 2006-02-08 |
JP3705795B2 (ja) | 2005-10-12 |
US20100018851A1 (en) | 2010-01-28 |
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