空気のような環境で長いサイクル寿命を持つリチウム酸素電池
Mohammad Asadi1,2, Baharak Sayahpour1, Pedram Abbasi1
1Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA.
Nature
|March 23, 2018
まとめ
研究者らは,シミュレートされた空気で動作する,安定したリチウム空気電池を開発しました. この技術はリチウムイオン電池よりも高いエネルギー密度を提供し,以前の制限を克服しています.
科学分野:
- 電気化学と材料科学
- エネルギー貯蔵技術
背景:
- リチウム空気電池は理論的に高い比エネルギーを提供し,輸送に有望である.
- 既存のリチウム-酸素システムは,純粋な酸素に限定され,副作用により短いサイクル寿命があり,体積エネルギー密度が低い.
研究 の 目的:
- 空気のシミュレーションで動作する 安定した長寿命のリチウム空気バッテリーシステムを開発する.
- 副反応と体積エネルギー密度を含む以前のリチウム酸素電池設計の限界に対処する.
主な方法:
- リチウム炭酸で保護されたアノド,モリブデン二酸化物カトド,イオン液体/ジメチル硫化物電解質を用いた新しいシステムの開発.
- 空気のシミュレーションで電池の操作とテスト
- 電池の動作メカニズムの解明のための計算研究
主要な成果:
- 開発されたリチウム空気電池は,シミュレートされた空気環境で最大700サイクルまでの長いサイクル寿命を実証しました.
- このシステムは,以前のリチウム酸素電池の設計に共通する副作用を効果的に軽減しました.
- 電池の空気中の性能についての洞察が得られました.
結論:
- これはリチウム空気電池技術の重要な進歩であり,空気のような大気圏での動作を可能にします.
- 証明された長いサイクル寿命と高い特異エネルギー密度の可能性は,この技術をリチウムイオン電池の実現可能な代替品として将来のアプリケーションに位置づけています.
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