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Updated: Jun 11, 2026

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一项针对离子电池的散装和表面W-doped高Ni阴极材料的比较研究

Gulzat Nuroldayeva^1,2, Tanay Umurzak^1,3, Aziza Kireyeva^1,3

¹Institute of Batteries, LLC, Kabanbay Batyr Ave 53, Astana 010000, Kazakhstan. nurzhan.umirov@nu.edu.kz.

|March 10, 2025

概括

兴奋剂改善了离子电池的高NCM811阴极材料. 用进行表面注,为下一代电池提供卓越的循环稳定性和容量保留.

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:

高层氧化物,如LiNi0.8Co0.1Mn0.1O2 (NCM811),是高能量密度离子电池的关键阴极材料.
提高NCM811的速度能力和长期循环稳定性仍然是实际应用的关键挑战.

研究的目的:

研究 (W) 兴奋剂对NCM811阴极材料结构和电化学性能的影响.
评估散装与表面W兴奋剂策略的有效性,以提高电池性能.

主要方法:

兴奋剂是通过湿化学共同沉 (散装) 和固态加工 (表面) 来实现的.
材料使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 进行了表征.
通过微腔电极测量评估了电化学性能,包括循环稳定性和速率能力.

主要成果:

兴奋剂增强了电荷转移动力学,并稳定了NCM811的微观结构.
表面化NCM811 (s-LNCMW) 显示出异常的循环稳定性,在500个循环后保持92%的容量.
在s-LNCMW的表面形成了一层保护性LiWO层,有助于提高稳定性.

结论:

表面兴奋剂是优化NCM阴极材料的一个有希望的策略.
这种方法可以提高电化学性能,特别是在循环寿命方面.
这些发现支持开发具有更高能量密度和寿命的先进离子电池.

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