Jump to main content
Jump to site search

Issue 7, 2015
Previous Article Next Article

NaCrO2 cathode for high-rate sodium-ion batteries

Author affiliations

Abstract

Sodium-ion batteries offer a potential alternative or complementary system to lithium-ion batteries, which are widely used in many applications. For this purpose, layered O3-type NaCrO2 for use as a cathode material in sodium-ion batteries was synthesized via an emulsion-drying method. The produced NaCrO2 was modified using pitch as a carbon source and the products were tested in half and full cells using a NaPF6-based non-aqueous electrolyte solution. The carbon-coated NaCrO2 cathode material exhibits excellent capacity retention with superior rate capability up to a rate of 150 C (99 mA h (g oxide)−1), which corresponds to full discharge during 27 s. The surface conducting carbon layer plays a critically important role in the excellent performance of this cathode material. We confirmed the reaction process with sodium using X-ray diffraction and X-ray absorption spectroscopy. Thermal analysis using time-resolved X-ray diffraction also demonstrated the structural stability of carbon-coated Na0.5CrO2. Due to the excellent performance of the cathode material described herein, this study has the potential to promote the accelerated development of sodium-ion batteries for a large number of applications.

Graphical abstract: NaCrO2 cathode for high-rate sodium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Mar 2015, accepted on 13 May 2015 and first published on 13 May 2015


Article type: Paper
DOI: 10.1039/C5EE00695C
Author version available: Download Author version (PDF)
Citation: Energy Environ. Sci., 2015,8, 2019-2026
  •   Request permissions

    NaCrO2 cathode for high-rate sodium-ion batteries

    C. Yu, J. Park, H. Jung, K. Chung, D. Aurbach, Y. Sun and S. Myung, Energy Environ. Sci., 2015, 8, 2019
    DOI: 10.1039/C5EE00695C

Search articles by author

Spotlight

Advertisements