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Updated: Jun 11, 2025

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Construction and Testing of Coin Cells of Lithium Ion Batteries
Published on: August 2, 2012
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全固体リチウム電池のためのリチウム豊富なMnベースのカトドの散発/インタフェース構造設計
Wei-Jin Kong1, Chen-Zi Zhao1, Liang Shen1
1Tsinghua Center for Green Chemical Engineering Electrification (CCEE), Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Journal of the American Chemical Society
|October 2, 2024
まとめ
Li2WO4をLi-rich Mn-based cathode materials (LRMO) に導入することで,全固体電池 (SSB) の導電性とインターフェースの安定性が向上する. これは,高度なバッテリーアプリケーションのエネルギー密度とサイクル寿命を高めます.
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- リチウムの豊富なMnベースのカトド材料 (LRMO) は,高エネルギー密度全固体電池 (ASSB) の可能性を示しています.
- 低電気伝導性とインターフェイスの不安定性は,ASSBにおけるLRMOの性能を阻害する.
研究 の 目的:
- 効率的なLi+/e-経路を作成するためにLRMOカトドのインシットバルク/インターフェース構造を設計する.
- ASSB用のLRMOカトッドの伝導性とインターフェイスの安定性を向上させる.
主な方法:
- Li2WO4を LRMO カトドにインシット構造設計で導入する.
- Li+の移動,表面酸素構造の安定性,そして酸素還元性の調査.
- 改造されたLRMOカトドを持つASSBの製造と電気化学試験
主要な成果:
- Li2WO4の導入により,Li+の移動エネルギーバリアが減少し,表面の酸素構造が安定した.
- 酸素リドックスの可逆性を向上させ,LRMOカトドの電圧崩壊を著しく改善した.
- 強化された散発構造と高電圧インターフェイスの安定性により,高面積容量 (~3.15 mAh/cm2) と84.1%の保持率で1200回以上になります.
結論:
- 現場の大量/インターフェース構造設計戦略は,ASSBのLRMOカソッド性能を効果的に向上させます.
- 超安定した高圧インターフェイスと高負荷の複合電極を高度なエネルギー貯蔵のために達成しました.
- この研究は,高性能ASSBのための次世代LRMOカソッド材料の開発のための洞察を提供します.
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