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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
電気化学的性質:モノクリニックにおける構造的関係 Li(3-y) V2(PO4) 3
S-C Yin1, H Grondey, P Strobel
1Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
Journal of the American Chemical Society
|August 21, 2003
まとめ
モノクリニック・リチウム・ヴァナジウム・フォスファート,アルファ-Li (((3) V (((2) (((PO ((4)) ((3),リチウムイオン電池の有望性を示しています. 構造と電気化学の研究は,充電順序とリチウムサイト相互作用がバッテリーの性能を決定することを明らかにしています.
科学分野:
- 材料科学 材料科学とは
- 電気化学 電気化学について
- 固体化学 固体化学
背景:
- モノクリニック・リチウム・ヴァナジウム・リン酸塩 (alpha-Li) はリチウムイオン電池の有望なカトド材料である.
- その可能性は,3つのリチウムイオンの可逆抽出による良好なイオン移動性と高いリチウム容量から生じる.
研究 の 目的:
- Li ((3-y) V ((2) ((PO ((4)) ((3)) 材料の構造特性を,その電気化学的電圧組成プロファイルと相関させるため.
- 電気化学的行動と相変化に影響を与える要因を理解する.
主な方法:
- ニュートロン difraktion 研究. ニュートロン difraktion 研究.
- (7) リ・マジック・アングル・スピニング・ニュクレアール・マグネティック・レゾナンス (Li MAS NMR) スペクトロスコピー.
- 電圧組成プロフィールの電気化学分析.
主要な成果:
- 構造特性と電気化学性能との相関を確立しました.
- 重要な要因として,ヴァナジウムサイトでの電荷オーダーリングと,グリッドサイトでのリチウムのオーダーリング/混乱を特定しました.
- これらの秩序現象に起因する電気化学曲線における観察されたヒステリーシス.
結論:
- バナジウム電荷の配列とリチウムの場所の占有量は,アルファ-リウムの電気化学的性質に大きく影響する.
- イオン-イオン相互作用は,これらの材料内の相変化を決定する上で重要な役割を果たします.
- これらの関係を理解することは,先進リチウムイオン電池のカトド材料の最適化に不可欠です.
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