Jump to main content
Jump to site search

Issue 48, 2016
Previous Article Next Article

Na2CoSiO4 as a cathode material for sodium-ion batteries: structure, electrochemistry and diffusion pathways

Author affiliations

Abstract

The importance of developing new low-cost and safe cathodes for large-scale sodium batteries has led to recent interest in silicate compounds. A novel cobalt orthosilicate, Na2CoSiO4, shows promise as a high voltage (3.3 V vs. Na/Na+) cathode material for sodium-ion batteries. Here, the synthesis and room temperature electrochemical performance of Na2CoSiO4 have been investigated with the compound found to yield a reversible capacity greater than 100 mA h g−1 at a rate of 5 mA g−1. Insights into the crystal structures of Na2CoSiO4 were obtained through refinement of structural models for its two polymorphs, Pn and Pbca. Atomistic modelling results indicate that intrinsic defect levels are not significant and that Na+ diffusion follows 3D pathways with low activation barriers, which suggest favourable electrode kinetics. The new findings presented here provide a platform on which future optimisation of Na2CoSiO4 as a cathode for Na-ion batteries can be based.

Graphical abstract: Na2CoSiO4 as a cathode material for sodium-ion batteries: structure, electrochemistry and diffusion pathways

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Oct 2016, accepted on 14 Nov 2016 and first published on 16 Nov 2016


Article type: Paper
DOI: 10.1039/C6CP06777H
Citation: Phys. Chem. Chem. Phys., 2016,18, 32744-32752
  •   Request permissions

    Na2CoSiO4 as a cathode material for sodium-ion batteries: structure, electrochemistry and diffusion pathways

    J. C. Treacher, S. M. Wood, M. S. Islam and E. Kendrick, Phys. Chem. Chem. Phys., 2016, 18, 32744
    DOI: 10.1039/C6CP06777H

Search articles by author

Spotlight

Advertisements