SiC-induced modification of MnCo2O4 nanoneedles fabricated on Ni foam for binder-free electrodes in high-performance asymmetrical supercapacitors

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2024-11-05 DOI:10.1016/j.matlet.2024.137665

Dajun Wu , Panyi Wu , Zhengpeng Xia , Xuekun Hong , Bin Qian , Paul K. Chu

引用次数: 0

Abstract

Supercapacitors with large energy densities are required for commercial applications. Herein, the urchin-like and hexagonal MnCo₂O₄/SiC composite is prepared in situ on Ni foam. The urchin-like MnCo₂O₄/SiC consists of nanoneedle clusters with a length of about 10 μm and a diameter of 20 nm. The MnCo₂O₄/SiC||AC asymmetrical supercapacitor (ASCs) shows an energy density of 90.3 Wh/kg (1.73F cm⁻²) at a power density of 1.25 kW/kg together with 92.1 % retention of the specific capacitance after 10,000 cycles. The results reveal excellent properties and large commercial potential.

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在镍泡沫上制造的 MnCo2O4 纳米针的碳化硅诱导改性，用于高性能非对称超级电容器中的无粘结剂电极

商业应用需要高能量密度的超级电容器。本文在镍泡沫上原位制备了海胆状六角形 MnCo2O4/SiC 复合材料。海胆状 MnCo2O4/SiC 由长度约为 10 μm、直径为 20 nm 的纳米针状簇组成。MnCo2O4/SiC||AC 不对称超级电容器（ASCs）的能量密度为 90.3 Wh/kg（1.73F cm-2），功率密度为 1.25 kW/kg，循环 10,000 次后比电容保持率为 92.1%。这些结果表明，这种电池具有卓越的性能和巨大的商业潜力。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive