A Practical High-Energy Cathode for Sodium-Ion Batteries Based on Uniform P2-Na0.7CoO2 Microspheres

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)5801-5805
Journal / PublicationAngewandte Chemie - International Edition
Issue number21
Publication statusPublished - 15 May 2017
Externally publishedYes


Layered metal oxides have attracted increasing attention as cathode materials for sodium-ion batteries (SIBs). However, the application of such cathode materials is still hindered by their poor rate capability and cycling stability. Here, a facile self-templated strategy is developed to synthesize uniform P2-Na<sub>0.7</sub>CoO<sub>2</sub> microspheres. Due to the unique microsphere structure, the contact area of the active material with electrolyte is minimized. As expected, the P2-Na<sub>0.7</sub>CoO<sub>2</sub> microspheres exhibit enhanced electrochemical performance for sodium storage in terms of high reversible capacity (125 mAh g<sup>−1</sup> at 5 mA g<sup>−1</sup>), superior rate capability and long cycle life (86 % capacity retention over 300 cycles). Importantly, the synthesis method can be easily extended to synthesize other layered metal oxide (P2-Na<sub>0.7</sub>MnO<sub>2</sub> and O3-NaFeO<sub>2</sub>) microspheres. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • cathode materials, layered metal oxides, microspheres, P2-Na0.7CoO2, sodium-ion batteries

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