无机材料学报 ›› 2016, Vol. 31 ›› Issue (6): 581-587.DOI: 10.15541/jim20150536
王超飞1, 鲁 双1, 陈慧龙1, 巩飞龙1, 龚玉印1, 李 峰1,2
收稿日期:
2015-11-02
修回日期:
2015-12-29
出版日期:
2016-06-20
网络出版日期:
2016-05-19
作者简介:
王超飞(1990–), 男, 硕士研究生. E-mail: zqwcf527@163.com
基金资助:
WANG Chao-Fei1, LU Shuang1, CHEN Hui-Long1, GONG Fei-Long1, GONG Yu-Yin1, LI Feng1,2
Received:
2015-11-02
Revised:
2015-12-29
Published:
2016-06-20
Online:
2016-05-19
About author:
WANG Chao-Fei. E-mail: zqwcf527@163.com
Supported by:
摘要:
在乙醇胺和水组成的混合溶剂中, Mn(Ac)2与氧化石墨烯一步反应得到还原石墨烯(RGO)与黑锰矿纳米颗粒(Mn3O4)组成的复合材料Mn3O4@RGO。以Mn3O4@RGO为正极, RGO为负极, 组装得到了具有优良储能性能的非对称型超级电容器Mn3O4@RGO//RGO。基于活性物质的总质量, 电容器的最大能量密度可达21.7 Wh/kg, 相应的功率密度为0.5 kW/kg; 同时, 最大功率密度为8 kW/kg时, 对应的能量密度为11.1 Wh/kg。Mn3O4@RGO//RGO还表现出良好的循环稳定性, 在经历5000次循环后, 比电容依然保持88.4%。电容器的良好储能性能可归因于在RGO表面生长的高密度Mn3O4纳米颗粒和RGO的良好导电性能。
中图分类号:
王超飞, 鲁 双, 陈慧龙, 巩飞龙, 龚玉印, 李 峰. 一步合成Mn3O4@RGO复合材料及其非对称超级电容器的应用[J]. 无机材料学报, 2016, 31(6): 581-587.
WANG Chao-Fei, LU Shuang, CHEN Hui-Long, GONG Fei-Long, GONG Yu-Yin, LI Feng. One-pot Synthesis and Application in Asymmetric Supercapacitors of Mn3O4@RGO Nanocomposites[J]. Journal of Inorganic Materials, 2016, 31(6): 581-587.
图2 (a) RGO和(b、c)Mn3O4@RGO的FESEM照片, (d)Mn3O4@RGO的XRD图谱
Fig. 2 FESEM and images of (a) RGO and (b-c) Mn3O4@RGO nanocomposites, (d) XRD pattern of Mn3O4@RGO nanocomposites
图3 (a、b) RGO和(c、d) Mn3O4@RGO的TEM 和HRTEM图片, 插图为对应的SAED照片
Fig. 3 TEM and HRTEM images of RGO (a-b) and Mn3O4@RGO nanocomposites (c,d), with inset in (d) showing the corresponding SAED pattern
图4 (a、b) Mn3O4@RGO电极和(c、d) RGO电极的CV曲线和恒流充放电曲线
Fig. 4 CV curves of Mn3O4@RGO nanocomposites (a) and RGO (c) measured in a three-electrode cell in 1 mol/L Na2SO4 electrolytes at different scan rates, and charge-discharge curves of supercapacitors constructed with Mn3O4@RGO nanocomposites (b) and RGO (d) in 1 mol/L Na2SO4 electrolytes measured at different current densities
图5 Mn3O4@RGO//RGO非对称两电极超级电容器的CV曲线(a), 恒流充放电曲线(b), 不同充放电电流密度下的质量比电容(c), 以及循环稳定性测试(d), 插图为前20次的循环测试曲线
Fig. 5 (a) Cyclic voltammograms at different scan rates, (b) charge/discharge curves and (c) specific capacitances at different current densities for Mn3O4@RGO//RGO asymmetric supercapacitor in 1 mol/L Na2SO4 electrolytes, and (d) charge-discharge cycling test of Mn3O4@RGO//RGO asymmetric supercapacitor at current density of 4 A/g. Inset shows the galvanostatic charge-discharge cyclic curves of the first twenty cycles at 4 A/g
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