Three-dimensional honeycomb composites consist of metal carbides and layered double hydroxides for high-performance supercapacitor electrode materials

IF 8.1 2区 工程技术 Q1 CHEMISTRY, PHYSICAL
Yuming Dai , Chao Sun , Hajera Gul , Linghua Tan , Yue Guo , Dongqin Qiu , Yutong Gu , Yuju Chen , Chengtong Ge , Dongqian Huang , Boyu Chen , Jingwen Hua , Jie Zhao
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引用次数: 0

Abstract

To achieve excellent electrochemical performance and stability, a composite material based on metal carbides (MXene) and CoNiZn layered double hydroxides (LDHs) has been synthesized, which synergistically combines the high electrical conductivity of MXene with the high theoretical specific capacity of LDHs. The as-prepared three-dimensional honeycomb-structural MXene/CoNiZn LDH composites have excellent cycle stability with a capacitance retention rate of 87.8% after 100,000 cycles and outstanding electrochemical activity with a specific capacitance of 2044.9 F g−1 at a scan rate of 5 mV s−1. Furthermore, electrochemical impedance spectroscopy also shows a reduced internal resistance indicating that the honeycomb-porous structure facilitates electron transfer and ion diffusion. This study provides a feasible route to develop high-performance supercapacitor electrode materials.

用于高性能超级电容器电极材料的金属碳化物和层状双氢氧化物三维蜂窝复合材料
为了实现优异的电化学性能和稳定性,我们合成了一种基于金属碳化物(MXene)和 CoNiZn 层状双氢氧化物(LDHs)的复合材料,它协同结合了 MXene 的高导电性和 LDHs 的高理论比容量。所制备的三维蜂窝结构 MXene/CoNiZn LDH 复合材料具有优异的循环稳定性,100,000 次循环后的电容保持率为 87.8%,并具有出色的电化学活性,在 5 mV s-1 扫描速率下的比电容为 2044.9 F g-1。此外,电化学阻抗谱还显示内阻减小,表明蜂窝状多孔结构有利于电子转移和离子扩散。这项研究为开发高性能超级电容器电极材料提供了一条可行的途径。
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来源期刊
Journal of Power Sources
Journal of Power Sources 工程技术-电化学
CiteScore
16.40
自引率
6.50%
发文量
1249
审稿时长
36 days
期刊介绍: The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells. Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include: • Portable electronics • Electric and Hybrid Electric Vehicles • Uninterruptible Power Supply (UPS) systems • Storage of renewable energy • Satellites and deep space probes • Boats and ships, drones and aircrafts • Wearable energy storage systems
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