Abstract
In this study, we investigate spray pyrolysis as an approach to synthesis of tunnel structure sodium manganese oxide, as it is a cost-effective and scalable technology. The powders synthesized with Na/Mn ratio of 0.50 displayed a pure tunnel structure, and demonstrated the best electrochemical performance, with a discharge capacity of 115 mAh/g. The material also showed good cycleability and rate capability. Noticeable decay in performance was seen in materials with Na/Mn ratios other than 0.50, indicating that this material is sensitive to minor compositional deviations. This study has demonstrated that spray pyrolysis is a promising synthesis method for this material.
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Acknowledgments
The authors would like to thank Dr. Pratim Biswas for the use of his glovebox. The authors are grateful to Dr. Naoaki Yabuuchi from Tokyo Denki University for his helpful discussions on sodium-ion cell fabricating. The electron microscopy facility used in this work was supported by the Nano Research Facility (NRF) at Washington University in St. Louis.
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Shen, KY., Lengyel, M., Wang, L. et al. Spray pyrolysis and electrochemical performance of Na0.44MnO2 for sodium-ion battery cathodes. MRS Communications 7, 74–77 (2017). https://doi.org/10.1557/mrc.2017.4
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DOI: https://doi.org/10.1557/mrc.2017.4