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安定した金属リチウムアノドのための結晶電解質Li2OHCl
Zachary D Hood1, Hui Wang, Amaresh Samuthira Pandian
1School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
Journal of the American Chemical Society
|January 23, 2016
まとめ
新しい固体電解質であるリチウムヒドロキシ塩化物 (Li2OHCl) は,リチウム金属陽極と安定したインターフェースを形成する. この材料は低温加工で 次の世代のバッテリーに 優れた安定性を提供します
科学分野:
- 材料科学
- 電気化学
- 固体化学
背景:
- 固体電解質は 安全で効率的なバッテリーに不可欠です
- 現在の固体酸化電解質は,高い加工温度 (> 1600 °C) を要求する.
- リチウム金属アノドのための安定した固体電解質の開発は依然として課題です.
研究 の 目的:
- リチウム金属と安定した固体電解質インターフェーズ (SEI) の形成を調査する.
- Li2OHCl固体電解質の低温合成と性質を調査する.
- リチウム金属に対するLi2OHClの電気化学的安定性を評価する.
主な方法:
- リチウム水酸化物 (LiOH) とリチウム塩化物 (LiCl) の前駆体を単純に混合する.
- 温和な温度 (<400°C) で加工する.
- イオン伝導性とアレニウス活性化エネルギーの特徴.
主要な成果:
- Li2OHCl固体電解質膜は400°C以下で製造されている.
- 結晶の欠陥が増えたLi2OHClは,最も高いイオン伝導性を示した.
- Li2OHClとリチウム金属アノドの間に安定したSEI層の形成が観察された.
- リチウム金属の融解点を超えて 安定性を証明した
結論:
- Li2OHClはリチウム金属電池の有望な固体電解質である.
- 低温加工は製造コストを大幅に削減します.
- SEI層の形成はインターフェースの安定性の鍵であり,より安全なバッテリー操作を可能にします.
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