ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Enhanced supercapacitive performance of MnO_x through N₂/H₂ plasma treatment

Shenggao Wang, Mingchen Zhou, Xujie Wang, Yangwu Mao, Quanrong Deng, and Geming Wang

Wuhan Institute of Technology, Wuhan, China

E-mail: wanggemingwit@163.com

Abstract: This work relates to the research on the effect of plasma on the performance of manganese oxide. Manganese oxide nanoflakes were prepared through the reaction of KMnO₄ and alcohol, and then treated by N₂ and N₂/H₂ plasma. The crystal structure of manganese oxide can be destructed by plasma treatment and manganese oxide become more amorphous and aggregated than those of as-synthesized MnO_x, both of which have been proven by XRD and TEM techniques. Results of XPS confirm that the ionic defects and oxygen vacancy are also formed in manganese oxide by plasma. The electrochemical behavior was studied using CV, GCD, and EIS method in 0.5 M Na₂SO₄ solution. The results show that N₂/H₂ plasma treatment can fascinate the coexistence of mixed valence of Mn and the formation of oxygen vacancies, reduce the charge-transfer resistance, and then enhance the capacitive performance efficiently.

Keywords: MnO_x ; Plasma ; Supercapacitors 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00819-5

Chemical Papers 73 (11) 2679–2686 (2019)