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兴奋剂对单粒子LiNiO的电化学和结构稳定性的影响₂

Elhoucine Elmaataouy¹, Majid El Kassaoui², Mohamed Elmouhinni³

¹Mohammed VI Polytechnic University: Universite Mohammed VI Polytechnique, Department of Materials Science, Energy, and Nano-engineering (MSN), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir 43150, Morocco., Lot 660, Ben Guerir 43150, Ben Gueri, Ben Gueri, MOROCCO.

|May 19, 2025

概括

兴奋剂增强单粒子氧化 (LiNiO) 阴极,提高稳定性和容量保留. 这种无材料在下一代电池中显示出有希望的结果.

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:

单粒子LiNiO₂由于其高容量和电压,是一个有前途的无阴极材料.
性能降低和结构不稳定性极限 LiNiO₂ 在循环期间的阴极寿命.
阳离子兴奋剂提供了一种提高结构稳定性的策略,而不会改变活性元素.

研究的目的:

调查兴奋剂对单粒子LiNiO2阴极的电化学性能和结构稳定性的影响.
为离子电池开发一种稳定,高容量的无正极材料.

主要方法:

通过滚球造辅助的热水合成,用于化的LiNiO₂制剂.
在0.2C电流密度下进行电化学测试 (充/放电循环).
使用横截面扫描电子显微镜 (SEM),X射线光电子谱学 (XPS),现场X射线衍射 (XRD) 和密度函数理论 (DFT) 计算的材料特征.

主要成果:

用添加的LiNiO2阴极表现出稳定的充/放电循环,在60个循环后保持90%的容量.
实现了高的第一个放电容量220mAhg-1.
的结合被证实,与Ni³⁺部分减少到Ni²⁺以及增强的结构稳定性相关.

结论:

兴奋剂有效地提高了循环稳定性,并保持了单颗粒LiNiO2阴极的高容量.
F 兴奋剂策略提供了高容量和增强循环保留的双重好处,解决了 LiNiO 的关键局限性.
这种方法为开发用于储能应用的先进的无正极材料提供了可行的途径.

关键词:

用进行兴奋剂.在现场 XRD 和 DFT.离子电池是离子电池的一种.没有的无.一个单颗粒的LiNiO2O2

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相关概念视频

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.