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Nanomaterials (Basel). 2020 Jan 30;10(2). pii: E246. doi: 10.3390/nano10020246.

Smoothing the Surface and Improving the Electrochemical Properties of NaxMnO2 by a Wet Chemical Method.

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School of materials and energy, Guangdong University of Technology, Guangzhou 510006, China.
School of Physics and optoelectronic engineering, Guangdong University of Technology, Guangzhou 510006, China.
Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510640, China.


NaxMnO2 (NMO) is treated by a wet chemical method in this paper. The treated NMO can form a copper oxide coating layer, and some of the coating layer can be peeled off, smoothing the surface of particles. Electrochemical measurement shows that treated NMO can maintain 72.6% of its specific capacity after 300 cycles, which is better than the 58.7% specific capacity of untreated NMO materials. Additionally, the ratio of capacity remaining rate can be improved from an initial 87% to 99.5%. So, this wet chemical method is available to smooth the electrode surface and reduce the internal impedance, and thus to effectively improve electrochemical performance during the battery cycle.


NaxMnO2 (NMO); electrochemical properties; surface; wet chemical method

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