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低度多重金属兴奋剂修改的Na₃V₂(PO₄)₃阴极:对高性能离子电池的协同增强

Jiayao Chen¹, Lijuan Luo¹, Tinghong Gao¹

¹Institute of Advanced Optoelectronic Materials and Technology, College of Big Data and Information Engineering, Guizhou University, Guiyang, China.

|February 17, 2026

概括

低的兴奋剂增强了离子电池 (SIB) 阴极材料. 这一策略改善了Na3V2(PO4) 3 (NVP) 中的结构稳定性和Na+扩散动力学,以提高SIB性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

离子电池 (SIB) 对大规模储能具有前景,但需要高性能阴极材料.
Na3V2(PO4) 3 (NVP) 具有作为SIB阴极的潜力,但其结构稳定性差,离子扩散缓慢.

研究的目的:

为了提高SIB的NVP基阴极的结构稳定性和电化学性能.
调查低兴奋剂对NVP属性的影响.

主要方法:

采用sol-gel方法,然后进行化,通过结合多金属离子 (Ti,Cr,Fe,Mn,Ca) 来合成低的NVP基材料 (NV2-xMxP).
描述包括X射线衍射 (XRD) 瑞特维尔德精细化,部分状态密度 (PDOS) 计算,电化学阻抗光谱 (EIS) 和电静电间歇定位技术 (GITT).
现场XRD和X射线光电子光谱 (XPS) 用于研究循环稳定性和反应机制.

主要成果:

经过优化后的NV1.8M0.2P阴极在长时间循环中表现出高放电能力和出色的容量保留 (85.01%在10°C4000个循环后).
低性兴奋剂诱导单元细胞收缩,增强结构稳定性和减少带隙,从而改善电子导电性.
与原始NVP相比,NV1.8M0.2P的电荷转移阻力显著降低,Na+扩散系数更高.

结论:

低性兴奋剂是一种优化基于NVP的高性能SIB的阴极的有效策略.
增强的结构稳定性,改进的电子导电性和更快的Na+扩散动力学有助于优越的电化学性能.
这种方法为设计下一代储能系统的先进电极材料提供了宝贵的见解.

关键词:

纳西康的结构是NASICON.阴极材料的材料是正极材料.低的兴奋剂使用.在离子电池中使用.结构稳定性结构稳定性

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