MoN/氮化石墨烯复合物用作锂离子电容器电极材料的研究

doi:10.3724/SP.J.1077.2013.12574

无机材料学报 ›› 2013, Vol. 28 ›› Issue (7): 733-738.DOI: 10.3724/SP.J.1077.2013.12574 CSTR: 32189.14.SP.J.1077.2013.12574

MoN/氮化石墨烯复合物用作锂离子电容器电极材料的研究

马文^1,2, 韩鹏献², 孔庆山², 张克军², 毕彩丰¹, 崔光磊²

(1. 中国海洋大学化学化工学院, 青岛266100; 2. 中国科学院青岛生物能源与过程研究所, 青岛266101)

收稿日期:2012-09-21 修回日期:2012-11-12 出版日期:2013-07-20 网络出版日期:2013-06-19
作者简介:马文(1988–), 男, 硕士研究生. E-mail: maw-ken@163.com
基金资助:
973项目(2011CB935703); 国家自然科学基金(20971077); 中科院“百人计划”; 山东省杰出青年基金(JQ200906)

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)

摘要/Abstract

摘要： 以钼酸和氧化石墨烯为原料, 正十二硫醇为还原剂, 水热法反应后, 在氨气气氛中高温氮化处理, 制备出氮化钼/氮化石墨烯(MoN/NGS)复合材料。采用X射线衍射和扫描电子显微镜对材料进行了表征; 采用循环伏安法、恒流充放电和电化学交流阻抗研究了该材料用于锂离子电容器的性能。结果表明, MoN纳米颗粒良好地分散在NGS表面和层间, 在0.05 A/g的电流密度下质量比容量能达到422 F/g; 经过900次充放电循环后, 容量保持率在80%以上。当功率为3000 W/kg时, 能量密度仍保持在32.5 Wh/kg。这归因于复合材料中的NGS提供了有效的导电网络, 并且有效抑制了MoN颗粒的团聚, 复合材料的网络结构更有利于离子的快速传输与扩散。

关键词: 氮化钼, 石墨烯, 电极材料, 锂离子电容器

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

中图分类号:

TQ174

马文, 韩鹏献, 孔庆山, 张克军, 毕彩丰, 崔光磊. MoN/氮化石墨烯复合物用作锂离子电容器电极材料的研究[J]. 无机材料学报, 2013, 28(7): 733-738.

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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MoN/氮化石墨烯复合物用作锂离子电容器电极材料的研究

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

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