Rational design of Li3VO4@carbon core-shell nanoparticles as Li-ion hybrid supercapacitor anode materials
SCIE
SCOPUS
- Title
- Rational design of Li3VO4@carbon core-shell nanoparticles as Li-ion hybrid supercapacitor anode materials
- Authors
- Lim, E.; Lim, W.-G.; Jo, C.; Chun, J.; Kim, M.-H.; Roh, K.C.; Lee, J.
- Date Issued
- 2017-10
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- A Li-ion hybrid supercapacitor (Li-HSC) delivering high energy within seconds (excellent rate performance) with stable cycle life is one of the most highly attractive energy storage devices. However, the limited anode materials for Li-HSC systems lead to stagnation and restrict the development of high-performance Li-HSCs. To tackle this problem, a facile synthetic route to Li3VO4@carbon core-shell nanoparticles (Li3VO4@C NPs), a promising high-power anode for Li-HSCs, is reported. The synthesized Li3VO4@C NPs show a high specific capacity of ��400 mA h g-1 at the current density of 0.02 A g-1 in the potential range from 0.2 to 3.0 V (vs. Li/Li+), with rapid charge/discharge characteristics (��110 mA h g-1 at 10 A g-1). By various electrochemical analyses, it was demonstrated that the excellent electrochemical properties of Li3VO4@C NPs stem from their improved pseudocapacitive behavior and their low internal resistance, which are mainly due to the synergistic effects of (i) a well-designed electrode morphology achieved by nano-engineering and (ii) the structural merits of a core-shell architecture. In addition, the Li-HSC using the Li3VO4@C NP anode and activated carbon (AC) cathode provides ��190 W h kg-1 energy and ��18 500 W kg-1 power density, with long-term cycle stability in the potential range from 0.0 to 4.3 V. ? 2017 The Royal Society of Chemistry.
- Keywords
- Activated carbon; Anodes; Electrodes; Hybrid materials; Nanoparticles; Shells (structures); Supercapacitor; Core-shell nanoparticles; Electrochemical analysis; Electrode morphology; High specific capacity; Hybrid supercapacitors; Internal resistance; Pseudocapacitive behavior; Synergistic effect; Lithium
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/91997
- DOI
- 10.1039/c7ta05863b
- ISSN
- 2050-7488
- Article Type
- Article
- Citation
- Journal of Materials Chemistry A, vol. 5, no. 39, page. 20969 - 20977, 2017-10
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