修正Pechini法由来のNa3V2(PO4)3/Cによる優れた低温性能ナトリウムイオン電池
Ilyas Mukushev1,2,3,4, Nurbolat Issatayev1,2,4, Aliya Mukanova1,2,4
1National Laboratory Astana, Laboratory of Energy Storage Systems Kabanbay Batyr Ave. 53 Astana 010000 Kazakhstan arailym.nurpeissova@nu.edu.kz.
RSC advances
|January 23, 2026
まとめ
Na3V2(PO4)3(NVP)ナノ材料を使用したナトリウムイオン電池は、低温用途に有望である。炭素被覆NVPを修正Pechini法で合成すると、零下条件下での性能が向上する。
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- ナトリウムイオン電池(SIB)は、リチウムイオン電池の持続可能な代替品として探求されている。
- NASICON型Na3V2(PO4)3(NVP)は、安定した構造と速いイオン拡散により、有望なSIBカソード材料である。
- NVPの低い電子伝導性は、実用的な応用を妨げている。
研究 の 目的:
- NASICON構造NVPナノ材料を改良された特性で合成すること。
- NVPベースのカソードの電気化学的性能、特に低温での評価。
- 実用的なSIBにおけるNVPの低い電子伝導性の課題に対処すること。
主な方法:
- 修正Pechini法を用いたNASICON構造NVPナノ材料の合成。
- NVPナノ材料への炭素被覆の適用。
- 様々な温度、特に零下条件下でのNVP/C複合カソードの電気化学的性能試験。
主要な成果:
- 修正Pechini法により、炭素被覆NVPナノ材料(NVP/C)が製造された。
- NVP/Cカソードは、0.2 C、-20°Cで74.13 mAh g-1の容量を示した。
- この材料は、-25°Cで室温容量の74.99%を維持し、優れた低温性能を示した。
結論:
- 修正Pechini法により合成されたNVP/C複合材料は、SIBにとって非常に有望なカソード材料である。
- この材料は、零下温度で例外的な性能と回復力を示す。
- この開発は、寒冷地や要求の厳しい用途におけるSIBの可能性を前進させる。
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