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用Sn合的Na₃V₂(PO₄)₃的性能提升,并与CNT集成,用于高效的离子电池

Haodi Dong¹, Changcheng Liu¹, Que Huang²

¹School of Environment and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, People's Republic of China; Institute of Advanced Energy Materials and Systems, North University of China, Taiyuan 030051, Shanxi, People's Republic of China.

Journal of colloid and interface science

|January 20, 2024

概括

这项研究引入了用碳纳米管 (CNTs) 涂覆的Sn-doped sodium vanadate phosphate (NVP),以提高电池性能. 优化的Sn0.07-NVP@CNTs材料显示了离子电池的导电性,稳定性和长期循环的改善.

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:

酸 (Na3V2(PO4) 3,NVP) 的发展受到电导率差和结构不稳定的限制.
现有的NVP材料难以满足对高性能离子电池的需求.

研究的目的:

通过解决其导电性和稳定性问题来提高NVP的电化学性能.
研究锡 (Sn) 替代和碳纳米管 (CNT) 涂层对NVP的协同效应.
开发一种用于先进的离子电池应用的新型电极材料.

主要方法:

简单的sol-gel方法用于合成涂 CNT (SnX-NVP@CNTs) 的 Sn-doped NVP,具有不同的兴奋剂水平.
材料的特性分析结构性,形态性和电化学性质.
电化学测试Sn0.07-NVP@CNTs作为离子电池中的阴极材料.

主要成果:

Sn2+兴奋剂通过产生更多的孔载体来改善电子运输,并通过增加格子间距来增强结构稳定性.
过量的Na+用于电荷补偿的引入增加了可逆容量和电极材料的利用率.
Sn0.07-NVP@CNTs表现出高可逆容量 (115.1mAh/g在0.1C),卓越的循环稳定性 (89.35%在10C的2000个循环后),以及显著的长期耐用性 (51.3mAh/g在60C的10,000个循环后).

结论:

同时优化丰富成分,替代和CNT涂层有效地克服了NVP的局限性.
Sn0.07-NVP@CNTs材料在高性能离子电池中具有重要的实际应用潜力.
开发的电极材料显示了下一代储能解决方案的前景.

关键词:

一个完整的细胞.富含Na(+) 的丰富物质 Na(3)V(2)(PO(4))(3)) 没有问题.Sn (((2+) 替换方式超长寿命超长寿命

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