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在水性离子电池的MnTiO₃阴极内诱导Mn缺陷

Yuchen Jiang¹, Min Jia¹, Yangyang Wan¹

¹School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China.

Journal of colloid and interface science

|March 15, 2024

概括

通过引入MnTiO3作为水性离子电池 (AZIB) 的新型阴极材料,这项研究表明,现场诱导的缺陷显著提高了反应动力学和循环稳定性,从而提高了电池性能.

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:

分层基材料是水性离子电池 (AZIB) 的有希望的阴极,因为它们的成本低,无毒性和安全性.
然而,这些材料的电/离子导电性差导致反应动力学缓慢,限制了它们的性能.

研究的目的:

引入MnTiO3作为AZIBs的新阴极材料.
研究现场诱导的缺陷对MnTiO3.3的电化学性能的影响.
通过理论计算了解缺陷增强动力学的机制.

主要方法:

合成和表征MnTiO3作为一个阴极材料.
在AZIB中对MnTiO3进行电化学测试,包括循环稳定性和速度能力.
密度函数理论 (DFT) 计算分析缺陷部位的电子结构和离子相互作用.

主要成果:

在第一个充电过程中,MnTiO3表现出增强的反应动力学和改善的循环稳定性.
DFT计算证实了缺陷部位的均电荷分布,促进了H+和Zn2+离子的吸引.
Mn-缺陷 MnTiO3 阴极在 100 mA/g 时达到 233.8 mAh/g 的容量,并在 450 个循环后在 400 mA/g 时保持 115 mAh/g.

结论:

在MnTiO3中现场诱导的缺陷是一种可行的策略,可以克服AZIBs层状阴极材料的动力限制.
这项工作为开发高性能阴极材料和理解它们在AZIB中的机制提供了新的途径.

关键词:

水性离子电池的水性离子电池阴极材料是以阴极为材料的.的缺陷的缺陷 MnTiO(3) 的阴极.

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