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

Siliang Zhao; Zhiping Lin; Fugen Wu; Feng Xiao; Jiantie Xu

doi:10.3390/nano10020246

Smoothing the Surface and Improving the Electrochemical Properties of Na_xMnO₂ by a Wet Chemical Method

Nanomaterials (Basel). 2020 Jan 30;10(2):246. doi: 10.3390/nano10020246.

Authors

Siliang Zhao¹, Zhiping Lin², Fugen Wu¹, Feng Xiao³, Jiantie Xu³

Affiliations

¹ School of materials and energy, Guangdong University of Technology, Guangzhou 510006, China.
² School of Physics and optoelectronic engineering, Guangdong University of Technology, Guangzhou 510006, China.
³ Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou 510640, China.

Abstract

Na_xMnO₂ (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.

Keywords: NaxMnO2 (NMO); electrochemical properties; surface; wet chemical method.

Abstract

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