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持続可能なリチウムベースの電池のためのオキシスルファートFe2O(SO4)2電極
Meiling Sun1, Gwenaëlle Rousse, Artem M Abakumov
1FRE 3677 "Chimie du Solide et Energie", Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
Journal of the American Chemical Society
|August 15, 2014
まとめ
研究者らは,リチウムベースのバッテリー用の新しい鉄酸化硫酸塩Fe2O(SO4) 2を開発しました. この豊富な材料は,安定した3.0V性能を提供し,持続可能なエネルギー貯蔵ソリューションを推進しています.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- 無機化学 無機化学とは
背景:
- 鉄基の電極は,鉄が豊富で環境に優しいため,リチウム基のバッテリーに求められています.
- ポリアニオン性鉄化合物は,調節可能な酸化還元能力のために特に興味深い.
研究 の 目的:
- バッテリー用の新しい鉄基オキシスルファート材料を合成し,特徴づけること.
- リチウムベースのバッテリーにおける新しいFeベースのオキシスルファートの電気化学的性能を評価する.
主な方法:
- Feベースのオキシスルファート相,Fe2O(SO4) 2.2.の低温合成
- リチウムイオン反応性および電圧プロフィールを決定するための電気化学試験.
- サイクル中の相変換を理解するための構造分析.
主要な成果:
- 低温で豊富な元素からFe2O(SO4) 2という新しいFeベースのオキシスルファートを合成しました.
- この材料は,方程式単位あたり約1.6リウムの原子で電気化学的活性を示しています.
- 平均稼働電圧は3.0VとLi(+) /Liで,可逆容量は≈125 mAh/gでした.
結論:
- オキシスルファートにおける実証されたリウムの挿入-脱挿は前例のないもので,複雑な相変換を明らかにしています.
- Fe2O(SO4)2は,持続可能なリチウムベースの電池のための有望な新種のポジティブ電極材料を表しています.
- この発見は,エネルギー貯蔵の研究におけるオキシスルファートの探索に新たな道を開く.
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