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高マンガンリチウムイオン電池用高性能LFP/Cカソード用プルシアンブルー由来デュアル機能前駆体

Jianwen Su1,2, Junwen Tang1, Shaoqiu Wang3

  • 1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Langmuir : the ACS journal of surfaces and colloids
|February 4, 2026
PubMed
まとめ

本研究では、先進的なリチウムイオン電池用の高性能炭素被覆リン酸鉄リチウム（LFP/C）カソードを作成するために、プルシアンブルーをデュアル前駆体として使用する新しい方法を紹介します。

キーワード:
リチウムイオン電池リン酸鉄リチウムプルシアンブルーカソード材料炭素被覆前駆体合成電気化学的性能エネルギー貯蔵

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科学分野:

  • 材料科学
  • 電気化学
  • エネルギー貯蔵

背景:

  • オリビン型リン酸鉄リチウム（LFP）は、安全性と環境上の利点から、リチウムイオン電池の有望なカソード材料です。
  • しかし、LFPは電気伝導率が悪く、リチウムイオンの輸送が遅いため、高出力用途での使用が制限されています。

研究 の 目的:

  • 電気化学的性能が向上した炭素被覆LFP（LFP/C）を合成するための、新規で効率的な方法を開発すること。
  • プルシアンブルー（PB）を、一段階のプロセスで鉄と炭素の両方の供給源として使用すること。

主な方法:

  • プルシアンブルー（PB）を前駆体として使用し、一段階焼結プロセスにより炭素被覆LFP（LFP/C）を合成しました。
  • 放電容量、レート性能、長期サイクル安定性テストを含む電気化学的評価を実施しました。

主要な成果:

  • 合成されたLFP/Cは、0.2Cで160.3 mAh·g-1の初期放電容量を示し、優れた保持率（6Cで119.1 mAh·g-1）と容量の回復を示しました。
  • 500サイクル後、それぞれ1Cおよび5Cで96.7％および84.3％の容量保持率を示し、例外的な長期サイクル安定性が実証されました。
  • 性能向上は、PB前駆体に由来するin situ形成された炭素層と高度に秩序化された構造に起因すると考えられます。

結論:

  • プルシアンブルーは、高性能LFP/C材料を合成するための効果的なデュアル機能前駆体として機能します。
  • このアプローチは、高出力リチウムイオン電池用の先進的なLFP/Cカソードを開発するための、シンプルで効率的な経路を提供します。