多重氧化还原中心和Fe/Mo双化Na3V2的缺陷工程,用于高性能离子电池的PO4) 3阴极
Min Xie1, Xiaoying Li1, Yufan Chen1
1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China.
Journal of colloid and interface science
|July 19, 2025
概括
这项研究引入了一种新的NASICON类型的阴极材料,Na3V1.44Fe0.5Mo0.06(PO4) 3,通过Fe/Mo双. 这种先进的材料为离子电池提供了高能量密度和出色的循环稳定性.
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
- 固态化学 固态化学
背景情况:
- 超离子导体 (NASICON) 类型的酸盐是电池的有希望的阴极材料,因为它们的高压和3D框架.
- 电子导电性差和能量密度低限制了传统NASICON阴极的应用.
研究的目的:
- 设计和合成一种具有增强电化学性能的新型NASICON型阴极材料.
- 研究Fe/Mo双的作用对Na3V2(PO4) 的结构和特性3.3.
主要方法:
- 使用传统的高温固态方法合成了Na3V1.44Fe0.5Mo0.06(PO4) 3阴极.
- 通过电荷-放电测试,循环稳定性测试和能量密度计算来评估电化学性能.
主要成果:
- Fe/Mo双合纳西康阴极在0.2°C时具有123.4mAhg-1的高容量,能量密度在2.2-4.2V范围内为406Whkg-1.
- 该材料表现出卓越的循环稳定性,在2500次30°C循环后保持92%的容量.
- 铁兴奋剂激活了V氧化还原对并引入了新的氧化还原对,而Mo兴奋剂则创造了增强离子运输的空缺.
结论:
- Fe/Mo双是提高纳西康型酸盐正极的电化学性能的一个有效策略.
- 开发的Na3V1.44Fe0.5Mo0.06(PO4)3材料显示了高性能离子电池的潜力.
- 这项工作为通过复杂的金属离子兴奋剂设计先进的阴极材料提供了一种可行的方法.
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