持続可能で安全なエネルギー貯蔵に向けた長期サイクル水性有機リドックスフローバッテリー (AORFB)
Bo Hu1, Camden DeBruler1, Zayn Rhodes1
1The Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-1400, United States.
Journal of the American Chemical Society
|December 16, 2016
まとめ
この研究では,土に豊富なフェロセンの誘導体を使用した新しい中性水性有機還元流電池 (AORFB) が導入されます. これらの持続可能な電池は 高いエネルギー密度と 格子規模の再生可能エネルギー貯蔵のための 卓越したサイクル安定性を提供します
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 伝統的なリドックスフロー電池 (RFB) は,高価で希少な材料と腐食性電解質のために制限に直面しています.
- 課題には,低濃度の酸化還元活性金属,高コストの分離器,活性材料のクロスオーバー,有害な電解質が含まれます.
- これらの問題は,再生可能エネルギーの貯蔵のためのRFBの広範な実施を妨げています.
研究 の 目的:
- 伝統的なRFBの持続可能で費用対効果の高い代替品を開発する.
- 新しいフェロセンの電解質を用いた中性水性有機還元流電池 (AORFB) を実証する.
- 従来のRFB技術に関連する材料と安全性の課題に取り組む.
主な方法:
- 水溶性フェロセンの誘導体である (フェロセニルメチル) トリメチルアモニウム塩化物 (FcNCl) とN1-フェロセニルメチル-N 1,N 1,N 2,N 2-ペンタメチルプロパン-1,2-ダイアミニウムジブロミド (FcN 2Br 2) の合成
- AORFBの組立は,合成されたフェロセンの誘導体をカソリートとして,メチルバイオゲン (MV) を中性NaCl電解質として使用します.
- エネルギー密度,パワー密度,サイクル安定性を含むバッテリーの性能の特徴.
主要な成果:
- 水溶液中のFcNCl (4.0 M, 107.2 Ah/L) とFcN 2Br 2 (3.1 M, 83.1 Ah/L) の高い濃度および容量を達成した.
- 高い理論的エネルギー密度 (45.5 Wh/L) と優れたサイクリング性能 (40×100 mA/cm2) を証明したフェロゼン/MV AORFB.
- FcNCl/MV AORFBは前例のないサイクル安定性 (700サイクル60mA/cm2で99.99%の容量保持) と高電力密度 (最大125mW/cm2) を示した.
結論:
- 環境に優しい持続可能な AORFB を開発し,土壌に豊富に存在するフェロセンの誘導体を使用しています.
- 新しいAORFB技術は,従来のRFBの限界を克服し,グリッド規模のエネルギー貯蔵のための有望なソリューションを提供します.
- 高い性能と安定性が実証され,安全で効率的な再生可能エネルギー貯蔵の有効な選択肢として位置づけられています.
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