アルカリ酸ハイブリッド電池のキノン電極
Yixin Li1, Yong Lu1, Youxuan Ni1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Haihe Laboratory of Sustainable Chemical Transformations, Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin 300071, China.
Journal of the American Chemical Society
|April 28, 2022
まとめ
キノンアノドは,水性バッテリーの持続可能でデンドライトのない溶液を提供し,高いエネルギー密度と急速な充電/放電を実現します. これらの電池は商業的な選択肢を上回り ネットワークスケールでの再生可能エネルギーの貯蔵が可能になります
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 水性電池は大規模なエネルギー貯蔵に不可欠ですが,低エネルギー密度,コスト,安全性などの制限に直面しています (例えば,亜鉛電池の金属デンドライト).
- 鉛酸電池やNi-MH電池のような既存の技術には,グリッドスケールのアプリケーションの普及を阻む欠点があります.
研究 の 目的:
- 持続可能な材料を用いた高エネルギー密度で安全で費用対効果の高い水性バッテリーシステムを開発する.
- 低価格のカトド・レドックスカップルと結合した固有のデンドライトのないアノド材料としてのキノンを調査する.
主な方法:
- キノンをアノド材料として,Mn2+/MnO2をカトド材料として使用したリドックスカップルの電気化学設計.
- KOH電解質におけるポリ ((1,4-アントラキノン) の最適化とアルカリ酸混合電解質システムの構築.
- 改善されたインターフェイス化学を持つスケールされた水性バッテリーの製造と試験.
主要な成果:
- キノンアノドは,Mn2+/MnO2カトドと結合すると,理論上のエネルギー密度は374Wh kg−1であることが示される.
- オプティマイズされたポリ ((1,4-アントラキノン) は,300 C-レートで295 mAh g−1,240 mA cm−2で225 mAh g−1の比容量を達成した.
- 実践的な水性電池は2Vの出力,急速な充電/放電 (<40秒で95%の容量),および鉛酸電池とNi-MH電池を上回る92Whkg−1のスケールされた電池エネルギー密度を示した.
結論:
- キノン基の水性電池は,大規模なエネルギー貯蔵のための有望で,デンドライトのない,費用対効果の高い代替案を提供します.
- 急速な電気化学運動と高いエネルギー密度により 太陽光や風力発電などの 絶え間ない再生可能エネルギーで 電力網を調節するのに適しています
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