Raspberry-like hollow carbon spheres: A promising electrode material for high-performance zinc-ion hybrid supercapacitors

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2024-12-17 DOI:10.1016/j.synthmet.2024.117821

Meng You, Xijun Zhao, Rongyu Lu, Jianxiang Ma, Xinghua Zhang, Chen Yuejing, Xiaoming Yang

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引用次数: 0

Abstract

We report a green and scalable one-pot synthesis of raspberry-like hollow carbon spheres (HCSs) as high-performance cathode materials for zinc-ion hybrid supercapacitors (ZIHSCs). Utilizing poly(methyl methacrylate)@polypyrrole (PMMA@PPy) core-shell nanoparticles as precursors and sodium carbonate (Na₂CO₃) as both a barrier and activator, the resulting HCSs exhibit a hierarchical pore structure, a high surface area of 1883 m²/g, and significant oxygen (6.9 atom%) and nitrogen (1.7 atom%) doping. These features enable exceptional electrochemical performance, with a specific capacitance of 257 F/g at 1 A/g in a 6 M KOH electrolyte and remarkable energy density of 125 Wh/kg at a power density of 160 W/kg in ZIHSCs with a 2 M Zn(CF₃SO₃)₂ electrolyte. Moreover, the HCSs exhibit outstanding cycling stability, retaining 92.6 % of their initial capacitance after 5000 cycles at 5 A/g. This study highlights the potential of environmentally friendly porous carbon materials as promising candidates for advanced electrochemical energy storage applications.

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.