Na3MnZr(PO4) 3:ナトリウム電池のための高圧カソード
Hongcai Gao1, Ieuan D Seymour2, Sen Xin1
1Texas Materials Institute, The University of Texas at Austin , Austin , Texas 78712 , United States.
Journal of the American Chemical Society
|December 4, 2018
まとめ
ナトリウム電池は 大規模なエネルギー貯蔵に 期待されています ナシコン構造のNa3MnZr ((PO4) 3) は,高容量と優れたサイクルライフをナトリウムイオンエネルギー貯蔵のために達成するカトド材料として優れた性能を示しています.
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- 大規模なエネルギー貯蔵には ナトリウム電池が不可欠です
- 高性能のカトド材料の開発は極めて重要です
- マンガネス・フォスファート・カトッドは調査中です.
研究 の 目的:
- ナシコン構造のNa3MnZr ((PO4) 3) を新しいカトド材料として報告する.
- ナトリウム電池の電気化学性能を評価する
- 構造と電気化学の性質を理解する
主な方法:
- 電気化学試験 (充電/放電サイクル)
- 構造分析について
- 密度関数理論 (DFT) の計算
主要な成果:
- Na3MnZr ((PO4) 3) は,他のマンガンのリン酸と比べて優れた性能を示しています.
- 105mAh g-1の高い放電能力を達成しました.
- 500サイクル後に91%の容量保持と優れたサイクル安定性.
- Mn4+/Mn3+とMn3+/Mn2+のリバーシブルアクセスは4.0と3.5Vで
- ナトリウム化/脱ナトリウム化中の小量の変化
- Mn3+のジャーン・テラー歪曲を抑制した.
結論:
- Na3MnZr ((PO4) 3) はナトリウム電池にとって非常に有望なカトードである.
- その構造は高いエネルギー密度と長いサイクル寿命を可能にします.
- この材料は,ナトリウムイオン挿入/抽出のための安定した電気化学的経路を提供します.
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