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用于水性电池的垂直通道厚电极的设计:实验和数值分析

Yanyi Ma¹, Wentao Yu¹, Wenxu Shang¹

¹Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei 230026, Anhui, China.

ACS applied materials & interfaces

|January 29, 2024

概括

研究人员开发了一种具有垂直通道 (VC-Ni) 的新电极,以提高厚电极的能量密度. 这种设计增强了充电传输,导致水性电池的性能优于传统电极.

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
电池技术电池技术

背景情况:

具有高面积负载的厚电极对于增加电池能量密度至关重要.
然而,增加厚度往往会导致更高的电荷传输阻力,从而限制性能.
优化电极微结构是克服这些局限性的关键.

研究的目的:

制造和评估一种具有垂直通道 (VC-Ni) 的新型低曲率电极,用于增强电荷传输.
为了研究电极微观结构对水性电池中厚电极性能的影响.
为设计高性能厚电极提供指导.

主要方法:

使用相逆方法制造垂直通道电极 (VC-Ni).
在高负载 (26.7 mg cm-2) 下对VC-Ni和常规 (Con-Ni) 电极进行电化学测试.
数字模拟分析离子运输动力学和度梯度 (OH-和H+) 在厚电极中.

主要成果:

高负荷的VC-Ni电极在5°C时达到134.0mAhg-1的特定容量,性能优于Con-Ni.
数字模拟显示,VC-Ni电极中的电荷传输速度更快,离子度梯度减少.
具体容量达到50%体积分数的峰值,受道大小和形状的影响,反转的梯形道产生最高容量.

结论:

VC-Ni电极设计有效地提高了厚电极中的电荷传输动力学.
微结构优化,包括通道几何和大小,对于最大化能量密度和性能至关重要.
这项研究为开发用于高性能水性电池的先进厚电极提供了宝贵的见解.

关键词:

水性电池的水性电池是什么道架构的道架构.数字模拟的数字模拟.性能优化性能优化性能优化厚厚的电极电极是一种厚厚的电极.

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