Study on the MoN/Nitrogen-doped Graphene Sheets Composite for Lithium Ion Capacitor Electrode Materials

doi:10.3724/SP.J.1077.2013.12574

Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (7): 733-738.DOI: 10.3724/SP.J.1077.2013.12574

• Research Paper • Previous Articles Next Articles

Study on the MoN/Nitrogen-doped Graphene Sheets Composite for Lithium Ion Capacitor Electrode Materials

MA Wen^1,2, HAN Peng-Xian², KONG Qing Shan², ZHANG Ke Jun², BI Cai Feng¹, CUI Guang Lei²

(1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; 2. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China)

Received:2012-09-21 Revised:2012-11-12 Published:2013-07-20 Online:2013-06-19
About author:MA Wen. E-mail: maw-ken@163.com
Supported by:
National Program on Key Basic Research Project of China (973 Program) (2011CB935703); National Natural Science Foundation of China (20971077); “100 Talents” program of the Chinese Academy of Sciences; Shandong Province Funds for Distinguished Young Scientist (JQ 200906)

Abstract

Abstract: Molybdenum nitride/nitrogen-doped graphene sheets (MoN/NGS) composite was prepared via a simple hydrothermal method followed by calcination at 800℃ under ammonia atmosphere. The phase structure and morphology of samples were characterized by XRD and SEM. The electrochemical properties of composite electrodes were studied by performing cyclic voltammetry, galvanostatic charge and discharge, and electrochemical impedance spectroscopy test. The MoN/NGS electrode deliveres specific capacitance of 422 F/g at the current density of 0.05 A/g, and its capacitance retention remains more than 80% after 900 cycles. The energy density remains as high as 32.5 Wh/kg when the power density is 3000 W/kg. It should be noted that such improvement should be attributed not only to the presence of NGS in the composite offering an effective conducting network but also to the hybrid structure of MoN/NGS composite providing a favorable and fast ion transport and diffusion.

Key words: molybdenum nitride, nitrogen-doped graphene sheets, electrode materials, lithium ion capacitor

CLC Number:

TQ174

MA Wen, HAN Peng-Xian, KONG Qing Shan, ZHANG Ke Jun, BI Cai Feng, CUI Guang Lei. Study on the MoN/Nitrogen-doped Graphene Sheets Composite for Lithium Ion Capacitor Electrode Materials[J]. Journal of Inorganic Materials, 2013, 28(7): 733-738.

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Study on the MoN/Nitrogen-doped Graphene Sheets Composite for Lithium Ion Capacitor Electrode Materials

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