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Updated: Sep 10, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Published on: December 20, 2016

高エントロピーの希土ハリド電解質で,サイクル安定性と費用対効果が向上する

Liang Luo^1,2, Anyi Zheng^1,2, Yingpeng Yu³

¹Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd, Xiong'an 071700, China.

|August 21, 2025

まとめ

新しい高エントロピー希土ハリド固体電解質 (SSEs) は,全固体電池 (ASSB) の費用対効果の高いソリューションを提供します. これらの電解質は高いイオン伝導性と優れたサイクル安定性を示し,実用的な応用への道を開いています.

科学分野:

材料科学
電気化学
固体化学

背景:

希土ハリド固体電解質 (SSEs) は,完全に固体電池 (ASSB) にとって重要な関心事である.
稀土資源の高いコストと低サイクル性能は,それらの実用的な適用を制限します.
効率的で安定したSSEの開発は,バッテリー技術の進歩に不可欠です.

研究の目的:

新しい高エントロピー希土ハリド電解質の設計と合成
電子伝導性,電気化学的安定性,およびASSBにおけるサイクル性能を評価する.
稀土ハリドSSEの改善のための高エントロピー設計の可能性を探求する.

主な方法:

2つの高エントロピー希土ハリド電解質の合理的な設計:Li$_{2.6}$ (Y,Ho,Er,Tm,Yb) Cl$_{5.6}$ (HEE-1) とLi$_{2.6}$ (Y,Ho,Er,Tm,Yb) $_{0.5}$Zr$_{0.5}$Cl$_{6.1}$ (HEE-2)
費用対効果を考慮して選出された5つの希土元素の組み込み
開発された電解質を用いたラボスケールASSBの製造と試験.

主要な成果:

HEE-1とHEE-2は,25 °Cで0.52 mS·cm$^{-1}$と1.46 mS·cm$^{-1}$の高いイオン伝導性を示しています.
HEE-1とHEE-2を持つASSBは,優れた高圧互換性と長サイクル安定性を示しています.
200サイクルで4.5Vで96.2% (HEE-1) と88.1% (HEE-2) の容量保持;HEE-2は1000サイクルで3Cで91.4%を維持する.

結論:

高エントロピーの設計戦略は,希土ハリドSSEの特性を効果的に強化します.
これらの新しい電解質は,ASSBにとって有望な費用対効果と性能を示しています.
この発見は,高度な材料設計により,希土ハリドSSEの商業的可能性が向上することを示唆しています.

キーワード:

全固体電池高エントロピー稀土ハライド固体電解質

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