| 第 47 卷第 6 期 |  | Vol. 47 No. 6 | | 2017 年 12 月 | Dec 2017 |
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所属栏目：功能材料
MnO2微球／石墨烯气凝胶复合材料的制备及其在超级电容器中的应用 |
| 蒋丽亚，酒红芳，任 娜，王 琪，谢春妹
（中北大学 理学院，山西 太原 030051） |
| 摘 要：采用改进的Hummers法制备氧化石墨，将制备好的MnO2微球均匀分散在氧化石墨烯分散液中，水热反应自组装制备MnO2微球／石墨烯气凝胶复合材料（MnO2／GA），对其物相、形貌、比表面积进行表征，并测试了其电化学性能。结果表明，MnO2微球嵌入包覆在了石墨烯片层中，电流密度0.5 A·g-1下，MnO2／GA的比电容为175.5 F·g-1高于MnO2的比电容（78.4 F·g-1），且经过1 000次循环，MnO2／GA具有更稳定的循环性能。 |
| 关键词：MnO2；MnO2／GA；电化学性能；超级电容器 |
| 中图分类号：O614.7 文献标识码：A 文章编号：1009-9212（2017）06-0077-05 |
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| Synthesis of MnO2 Microspheres/Graphene Aerogels and Its Application in Supercapacitor |
| JIANG Li-ya, JIU Hong-fang,REN Na,WANG Qi,XIE Chun-mei
(College of Science, North Central University, Taiyuan 030051, China) |
| Abstract：Graphite oxide (GO) was prepared by a modified Hummer method. Graphene hybrid aerogels with MnO2 microspheres was prepared by hydrothermal reaction of a dispersion of pre-synthesized MnO2 microspheres in Graphite oxide (GO) solution. Crystalline phase, morphology, and specific surface area of this obtained airogel were characterized, and electrochemical properties were tested. The results indicated that MnO2 microspheres were embedded in the graphene sheet; at a current density of 0.5 A·g-1, MnO2/GA had a specific capacitance of 175.5 F·g-1, which was higher than that of MnO2(78.4 F·g-1), and MnO2/GA had a more stable cycle performance after 1 000 cycles. |
| Key words：MnO2; graphene aerogels; electrochemical performance; supercapacitor |
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基金项目：中北大学理学院研究生创新项目基金。
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作者简介：蒋丽亚（1991-），女，山西朔州人，硕士研究生，研究方向：超级电容器电极材料（E-mail：1522628610@qq.com）。
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收稿日期：2017-10-08
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