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* Corresponding authors
a
Department of Nano Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea
E-mail:
[email protected]
b Center for Energy Convergence, Korea Institute of Science and Technology, Seoul 136-791, South Korea
c
Department of Chemistry, Bar Ilan University, Ramat-Gan 52900, Israel
E-mail:
[email protected]
d
Department of Energy Engineering, Hanyang University, Seoul 133-791, South Korea
E-mail:
[email protected]
Abstract
Sodium-ion batteries offer a potential alternative or complementary system to tướng 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 tướng a rate of 150 C (99 mA h (g oxide)−1), which corresponds to tướng 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 tướng the excellent performance of the cathode material described herein, this study has the potential to tướng promote the accelerated development of sodium-ion batteries for a large number of applications.
Supplementary files
Article information
- DOI
- https://doi.org/10.1039/C5EE00695C
- Article type
- Paper
- Submitted
- 03 Mar 2015
- Accepted
- 13 May 2015
- First published
- 13 May 2015
Xem thêm: Hàu ngon, bổ nhưng lại 'đại kỵ' với 4 nhóm người này
Energy Environ. Sci., năm ngoái,8, 2019-2026
Author version available
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., năm ngoái, 8, 2019 DOI: 10.1039/C5EE00695C
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