| 第 47 卷第 6 期 |  | Vol. 47 No. 6 | | 2017 年 12 月 | Dec 2017 |
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所屬欄目：功能材料
MnO2微球／石墨烯氣凝膠復合材料的制備及其在超級電容器中的應用 |
| 蔣麗亞，酒紅芳，任 娜，王 琪，謝春妹
（中北大學(xué) 理學(xué)院，山西 太原 030051） |
| 摘 要：采用改進(jìn)的Hummers法制備氧化石墨，將制備好的MnO2微球均勻分散在氧化石墨烯分散液中，水熱反應自組裝制備MnO2微球／石墨烯氣凝膠復合材料（MnO2／GA），對其物相、形貌、比表面積進(jìn)行表征，并測試了其電化學(xué)性能。結果表明，MnO2微球嵌入包覆在了石墨烯片層中，電流密度0.5 A·g-1下，MnO2／GA的比電容為175.5 F·g-1高于MnO2的比電容（78.4 F·g-1），且經(jīng)過(guò)1 000次循環(huán)，MnO2／GA具有更穩定的循環(huán)性能。 |
| 關(guān)鍵詞：MnO2；MnO2／GA；電化學(xué)性能；超級電容器 |
| 中圖分類(lèi)號：O614.7 文獻標識碼：A 文章編號：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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基金項目：中北大學(xué)理學(xué)院研究生創(chuàng )新項目基金。
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作者簡(jiǎn)介：蔣麗亞（1991-），女，山西朔州人，碩士研究生，研究方向：超級電容器電極材料（E-mail：1522628610@qq.com）。
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收稿日期：2017-10-08
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