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碳增强的Ni₃S₂/Ti₃C₂T_x MXene复合材料作为高性能离子电容器的阳极

Xu-Geng Deng¹, Le-Qing Fan¹, Xiao-Yun Fu¹

¹Fujian Key Laboratory of Photoelectric Functional Materials, College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China; Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China.

Journal of colloid and interface science

|February 1, 2024

概括

这项研究开发了一种新的阳极材料Ni3S2/Ti3C2Tx/C,用于高性能离子电容器 (LIC). 复合材料显示出出色的容量,循环性和速率能力,为先进的储能解决方案铺平了道路.

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:

离子电容器 (LIC) 提供了混合能源存储解决方案,将电池的高能量密度与超级电容器的高功率密度相结合.
在高性能LIC中,阳极和阴极之间的反应动力学平衡仍然存在挑战.
在阳极材料中增强电子/离子转移对于卓越的LIC性能至关重要.

研究的目的:

为离子电容器开发一种高速率和高容量的阳极材料.
改进阳极材料的电子/离子转移动力学.
为了合成和描述一种基于Ni3S2的新型复合材料,用于先进的能量存储.

主要方法:

在Ti3C2Tx MXene板上支持合成的Ni3S2纳米粒子.
在现场通过多巴胺碳化在Ni3S2纳米粒子上产生无形碳层.
制造了一种离子电容器设备,使用开发的阳极和一个由sternculiae lychnophorae衍生的多孔碳 (SLPC) 阴极.

主要成果:

Ni3S2/Ti3C2Tx/C复合材料具有很高的特定表面积 (112.6 m2/g).
阳极在0.2A/g时表现出了626.0 mAh/g的可逆放电特定容量,在400个循环后增加到1150.8 mAh/g.
组装的LIC设备实现了119.1Wh kg-1的能量密度和显著的容量保留 (95.5%在1A/g后1万个周期).

结论:

Ni3S2/Ti3C2Tx/C复合材料是高性能离子电容器的一个有希望的阳极材料.
Ti3C2Tx MXene和无形碳的协同作用提高了电化学性能.
开发的LIC设备显示了下一代储能应用的潜力.

关键词:

无形碳是一种无形的碳.阳极是一种极.离子电容器的离子电容器 () () () () () () () () () () () () () () () () () () () () () () ) () () () () ) () () () () () () ) () () ) () ) () ) () () ) () () ) () () () () ) () () ()Ti(3)C(2)T(x) MXene 这种物质是什么?

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