Jump to main content
Jump to site search


Rational Design of Li3VO4@Carbon Core-Shell Nanoparticles as Li-ion Hybrid Supercapacitor Anode Materials

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 charging/discharging 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.

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Jul 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05863B
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Rational Design of Li3VO4@Carbon Core-Shell Nanoparticles as Li-ion Hybrid Supercapacitor Anode Materials

    E. Lim, W. Lim, C. Jo, J. Chun, M. Kim, K. C. Roh and J. Lee, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05863B

Search articles by author

Spotlight

Advertisements