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亜鉛過酸化物による再充電可能な亜鉛空気電池
Wei Sun1, Fei Wang2, Bao Zhang3
1MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Münster, Germany.
Science (New York, N.Y.)
|January 1, 2021
まとめ
この研究は,充電可能な亜鉛空気電池のための新しい亜鉛-酸素/亜鉛過酸化化学を導入します. この2e/酸素プロセスは,非アルカリの電解質で,バッテリーの可逆性と安定性を大幅に改善します.
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 再充電可能なアルカリ亜鉛空気電池は,高いエネルギー密度と安全性を提供します.
- しかし,4電子と酸素の化学反応が遅いことと,高熱性電解質とCO2による電気化学的不可逆性により,課題に直面している.
- アルカリ性電解質の寄生反応は,これらの電池の効率と寿命を制限します.
研究 の 目的:
- 亜鉛空気電池の高度に可逆的な酸化還元反応を開発する.
- 伝統的な亜鉛空気電池の化学的限界を克服するために
- 亜鉛空気電池の安定した動作を環境空気で可能にします.
主な方法:
- 新しい亜鉛-酸素/亜鉛過酸化物 (ZnO2) の化学反応を調査した.
- 使用された非アルカリの水性電解質
- 空気カトドの水弱でZn2+が豊富なヘルムホルツ内層を,水害性三硫酸メタンアニオンを使用して設計した.
主要な成果:
- 2電子/酸素のプロセスを達成し,非常に可逆的な酸化還元反応を可能にしました.
- 周りの空気で安定した動作を証明した.
- アルカリ性亜鉛空気電池と比較して実質的に改善された可逆性が観察されました.
結論:
- 新しいZnO2化学は,高度な充電可能な亜鉛空気電池の経路を提供します.
- ハイドロフォビックアニオンは,キャソードインターフェイスを安定させ,性能を向上させる上で重要な役割を果たします.
- この非アルカリ的アプローチは,効率的で耐久的な亜鉛空気のエネルギー貯蔵のための有望な代替手段を提供します.
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