Jump to main content
Jump to site search

Issue 19, 2013
Previous Article Next Article

A new strategy for synthesizing yolk–shell V2O5 powders with low melting temperature for high performance Li-ion batteries

Author affiliations

Abstract

This paper presents the fabrication of yolk–shell V2O5 powders with a low melting temperature of 690 °C by using a simplified two-step process. The spherical V2O3–C composite obtained by spray pyrolysis transforms into yolk–shell V2O5 powder by a simple combustion process at 400 °C. The yolk–shell V2O5 powders are composed of nanoplate crystals several tens of nanometers in size, and have a BET surface area of 15 m2 g−1. The powders exhibit initial discharge and charge capacities of 271 and 264 mA h g−1 at a current density of 1000 mA g−1, respectively, and a corresponding Coulombic efficiency of 97.4%. After 100 cycles, the discharge capacity of the yolk–shell V2O5 powders is 201 mA h g−1. In contrast, spherical V2O5 powders with a dense structure exhibit low initial discharge and charge capacities of 160 and 145 mA h g−1, respectively. The structural stability of the yolk–shell during Li-ion insertion and extraction improves the electrochemical properties of the V2O5 powders, even at high current densities.

Graphical abstract: A new strategy for synthesizing yolk–shell V2O5 powders with low melting temperature for high performance Li-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 May 2013, accepted on 17 Jul 2013 and first published on 19 Jul 2013


Article type: Communication
DOI: 10.1039/C3NR02625F
Citation: Nanoscale, 2013,5, 8899-8903
  •   Request permissions

    A new strategy for synthesizing yolk–shell V2O5 powders with low melting temperature for high performance Li-ion batteries

    Y. N. Ko, Y. Chan Kang and S. B. Park, Nanoscale, 2013, 5, 8899
    DOI: 10.1039/C3NR02625F

Search articles by author

Spotlight

Advertisements