Issue 47, 2016

Effects of zinc and manganese ions in aqueous electrolytes on structure and electrochemical performance of Na0.44MnO2 cathode material

Abstract

The sodium manganese oxide, Na0.44MnO2, was synthesized by a solid-state reaction routine combined with a sol–gel process using Mn(CH3CO2)2·4H2O as the manganese source. Results show that the capacity and cycling stability of Na0.44MnO2 cathodes are enhanced significantly by using a hybrid aqueous electrolyte (Na2SO4, ZnSO4 and MnSO4). The energy storage mechanism of as-prepared Na0.44MnO2 in the hybrid aqueous electrolyte is associated with the insertion/extraction of zinc and sodium multi-ions with the help of synergistic effects between zinc and manganese ions and the quasi-reversible deposition–dissolution process of Mn2+ ions. The Na0.44MnO2 electrode displays both excellent storage properties with zinc, sodium and manganese ions (∼340 mA h g−1 at 100 mA g−1 after 150 cycles) and reversibility (∼100% coulombic efficiency during cycling). The excellent reversibility and good cycling properties indicate that the Na0.44MnO2 can be a promising material for energy storage devices by using a hybrid aqueous electrolyte.

Graphical abstract: Effects of zinc and manganese ions in aqueous electrolytes on structure and electrochemical performance of Na0.44MnO2 cathode material

Supplementary files

Article information

Article type
Paper
Submitted
20 Jan 2016
Accepted
11 Apr 2016
First published
13 Apr 2016

RSC Adv., 2016,6, 40793-40798

Effects of zinc and manganese ions in aqueous electrolytes on structure and electrochemical performance of Na0.44MnO2 cathode material

S. Bai, J. Song, Y. Wen, J. Cheng, G. Cao, Y. Yang and D. Li, RSC Adv., 2016, 6, 40793 DOI: 10.1039/C6RA01768A

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