非固体放電製品に基づくアプロティック・リチウム・酸素電池
Li-Na Song1, Li-Jun Zheng1, Xiao-Xue Wang1,2
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
Journal of the American Chemical Society
|January 3, 2024
まとめ
研究者は,リチウム酸素電池の非固体放電製品を可能にするために,溶解可能なイリジウム単原子触媒を開発しました. カソッドの損傷を克服し 高容量で長いサイクル寿命を実現します
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- アプロティック・リチウム・酸素 (Li-O2) バッテリーはエネルギー密度が高いが,固体放電製品の形成に問題がある.
- 固体放電製品は,カトドの受動化と構造的損傷を引き起こし,実用的なアプリケーションを制限します.
研究 の 目的:
- Li-O2電池のための均質で溶解可能な電気触媒を開発する.
- カソッドの分解を防ぐため,非固体放電製品を得る.
主な方法:
- 溶解可能な電気触媒として,イリジウム (Ir) 単原子ベースの多孔な有機ポリマー (Ir/AP-POP) を利用した.
- 非固体LiO2形成のための核化部位と中間物質との相互作用を調査した.
- Li-O2電池のセットアップにカーボン布のカソッドを使用した.
主要な成果:
- 電解質溶液の最終排出物として非固体LiO2が得られる.
- 12.8mAhの超高放電容量を示した.
- 0.03Vの超低電位と700時間のサイクル寿命が観察されました.
結論:
- 溶解可能なIr/AP-POP触媒の使用により,非固体放出製品が作られ,従来のLi2O2成長モードが破壊されます.
- このアプローチは,アプロティックLi-O2電池の性能と活性を大幅に向上させます.
- この研究は次世代の高エネルギー貯蔵装置の 発展の道を開くのです
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