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原発アルミニウム空気電池の油位移転による腐食抑制
Brandon J Hopkins1, Yang Shao-Horn2, Douglas P Hart2
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. bhopkins@mit.edu.
まとめ
アルミニウム空気電池は 寿命が長くなり エネルギーも蓄積できます 新しい方法は,スタンドバイ中のアルミニウム電極を保護するためにオイルを使用し,腐食を防止し,使用可能なエネルギー密度を大幅に高めます.
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 主要なアルミニウム空気電池は,理論的には高いエネルギー密度を提供します.
- ネガティブ電極の腐食は,保存期間と性能を減らす主要な制限です.
- 既存の腐食緩和戦略は,しばしばバッテリーの電力またはエネルギー密度を損なう.
研究 の 目的:
- アルミニウム空気電池のオープン回路の腐食を抑制する新しい方法を開発する.
- アルミニウム空気電池システムの利用可能なエネルギー密度と保存期間を向上させる.
- リバーシブルな電極保護により,高電力とエネルギー密度を可能にします.
主な方法:
- 電池の待機時に電極表面に非導体油を入れ替える.
- 細胞表面の水中オレオフォビック湿潤特性を利用して,逆転可能な油位移転を行う.
- 機能的なアルミニウム空気のセルでこの方法を実証する.
主要な成果:
- 利用可能なエネルギー密度が420%増加した.
- 負の電極の腐食が 99.99% 減少した.
- 自放電率を0.02%に減らし,システムエネルギー密度700Wh/Lと900Wh/kgを実現しました.
結論:
- バッテリーの性能を損なうことなく,油位移転法が効果的に腐食を抑制します.
- この技術は,アルミニウム空気電池の寿命とエネルギー貯蔵能力を大幅に高めます.
- 開発されたアルミニウム空気電池は,実用的で高エネルギー密度のシステムへの実行可能な道を示しています.
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