Vol. 27 No. 2 (2017)
Papers

Electrochemical Performance of \(\text{Na}_{0.44}\text{MnO}_{2}\) Synthesized by Hydrothermal Method Using as a Cathode Material for Sodium Ion Batteries

Nghia Van Nguyen
Hanoi Architectural University

Published 24-08-2017

Keywords

  • cathode materials,
  • hydrothermal method,
  • Na0.44MnO2,
  • sodium ion battery

How to Cite

Ta, T. A., Pham, L. D., Nguyen, H. S., Hoang, C. V., Le, C. H., Dang, C. T., Nguyen, H. T. T., & Nguyen, N. V. (2017). Electrochemical Performance of \(\text{Na}_{0.44}\text{MnO}_{2}\) Synthesized by Hydrothermal Method Using as a Cathode Material for Sodium Ion Batteries. Communications in Physics, 27(2), 143. https://doi.org/10.15625/0868-3166/27/2/9631

Abstract

Orthorhombic Na0.44MnO2 with an S-shape tunnel structure was successfully synthesized by a hydrothermal method. The Na0.44MnO2 material has lattice parameters of a = 9.0842 Å, b = 26.2889 Å, and c = 2.8245 Å. Scanning electron microscope analysis reveals that the morphologies of Na0.44MnO2 consist of Na0.44MnO2 nanowires with diameters of about 30-50 nm and Na0.44MnO2 particles with the size in the range of 200 to 500 nm. The first charge and discharge capacities of Na0.44MnO2 cathode, at 0.1 C between 2.0-4.0 V, are 66.2 mAh g-1 and 62.7 mAh g-1, respectively. The Na0.44MnO2 has an excellent cycle stability with 85.3% of capacity retention over 50 cycles. The coulombic efficiency of Na0.44MnO2 material is approximately 90% after 70 cycles. It is suggested that the structure of Na0.44MnO2 is stable during cycling and Na0.44MnO2 can be a promising cathode material for sodium ion batteries.

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