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嵌入N-化碳的六甲酸量子点,用于具有超高耐久性的水性性电池

Yanhong Li¹, Zhiting Song¹, Qifeng Zhang¹

¹College of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, P. R. China. liyanhong@cqupt.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|July 25, 2023

概括

-普鲁士蓝类似物 (Ni-Co PBA) 使用N-化碳稳定. 这种碳涂层材料表现出水性性电池的增强稳定性和高容量,延长了电极寿命.

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:

-普鲁士蓝类似物 (Ni-Co PBA) 在水性电解质中表现出结构的不稳定性.
这种不稳定导致金属阴离子和化离子溶解,导致容量降解和寿命有限.

研究的目的:

为水性电池开发基于Ni-Co PBA的稳定高性能电极材料.
为了提高Ni-Co PBA的结构完整性和电化学性能.

主要方法:

通过共沉,现场聚合和气大气化合成N-doped碳涂层的Ni-Co PBA量子点 (CC-Ni-Co PBA).
在水性性电解质中对CC-Ni-Co PBA电极进行电化学测试.
组装和测试一个不对称的性电池设备.

主要成果:

CC-Ni-Co PBA 电极实现了 333.7 C g-1.1 的高特异容量.
观察到优异的速率能力,在初始电流密度的40倍时保持188.8Cg-1.
证明了出色的循环稳定性,在10,000个循环后82%的容量保留.
一个不对称的性电池实现了最大能量密度为33.2 W h kg-1和功率密度为3.1 kW kg-1.

结论:

N-化碳涂层有效地保护Ni-Co PBA免于溶解,在循环过程中适应体积变化.
CC-Ni-Co PBA 材料为水性电解质中的电池类型电极提供了更好的循环稳定性和性能.
这项工作为开发耐用的普鲁士蓝色基于模拟的电极材料用于储能应用提出了一个有前途的战略.

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