Ni3S2@CoS core–shell nano-triangular pyramid arrays on Ni foam for high-performance supercapacitors

文献信息

发布日期 2015-05-19
DOI 10.1039/C5CP01945A
影响因子 3.676
作者

Rui Li, Senlin Wang, Jianpeng Wang, Zongchuan Huang


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摘要

In this study, we demonstrate a facile method to fabricate novel Ni3S2 nano-triangular pyramid (NTP) arrays on Ni foam through a hydrothermal process and build unique Ni3S2@CoS core–shell NTP arrays by electro-deposition. The obtained Ni3S2@CoS material displays twice the specific capacitance of the pure Ni3S2 material in both a three-electrode system (4.89 F cm−2 at 4 mA cm−2) and asymmetric supercapacitor device (0.69 F cm−2 at 1.43 mA cm−2). In addition, the asymmetric supercapacitor demonstrates the outstanding energy density of 28.24 W h kg−1 at a power density of 134.46 W kg−1, with a stable cycle life (98.83% retained after 2000 cycles). The unique structure of the Ni3S2@CoS core–shell NTP arrays, which provides an ultra-thin CoS shell to enlarge efficient areas, introduces good conductivity, and short transportation lengths for both ions and electrons, contributes most to its excellent performance. Moreover, the bare Ni3S2 NTP arrays can be used as a new template to build other potential electrode materials.

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来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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