| 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
中空CoMn2O4／石墨烯氣凝膠復合物的制備及其電化學(xué)性能 |
| 王 琪，張立新，張少梅，倪昌輝，孟亞娟
（中北大學(xué) 化學(xué)工程與技術(shù)學(xué)院，山西 太原 030051） |
| 摘 要：以碳球為模板通過(guò)溶劑熱-煅燒的方法合成中空CoMn2O4，并對其表面進(jìn)行陽(yáng)離子改性。以改性CoMn2O4和氧化石墨烯（GO）為原料，使用水熱法及冷凍干燥技術(shù)制備出中空CoMn2O4／石墨烯氣凝膠（GA）復合物。采用TEM、SEM、XRD、BET對樣品的形貌和結晶結構進(jìn)行表征；采用CHI660E電化學(xué)工作站對樣品進(jìn)行電化學(xué)性能評估。結果表明，中空CoMn2O4納米球緊緊地固定在三維多孔網(wǎng)絡(luò )結構GA中，GA的摻入不僅有效緩解了充放電過(guò)程中CoMn2O4負極的體積膨脹效應，也加快了鋰離子電子傳輸速率，進(jìn)而大大提高了電池的循環(huán)性能和倍率性能。 |
| 關(guān)鍵詞：中空；CoMn2O4；石墨烯氣凝膠；電化學(xué)性能 |
| 中圖分類(lèi)號：TM919.2 文獻標識碼：A 文章編號：1009-9212（2017）06-0050-05 |
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| Preparation and Electrochemical Performance of Hollow CoMn2O4/Graphene Aerogel Hybrids |
| WANG Qi, ZHANG Li-xin, ZHANG Shao-mei, NI Chang-hui, MENG Ya-juan
(School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China) |
| Abstract：The hollow CoMn2O4 was synthesized by a solvothermal-anneal method using carbon spheres as template, and the surface was further modified by cation. The hollow CoMn2O4/GA hybrids were prepared by a hydrothermal method and freeze-drying technique using the hollow CoMn2O4 and GO as raw materials. TEM, SEM, XRD, and BET were used to characterize the morphology and crystallographic structures of the samples. The electrochemical workstation was used to evaluate the electrochemical properties of the samples. The results revealed that the hollow CoMn2O4 was tightly anchored on the 3D porous network structure of GA. The introduce of GA was not only to effectively relieve volume expansion of CoMn2O4 anode during the discharge-charge process, but also facilitated lithium ion and electron transport rate. Thus, the cycling performance and rate-capability of battery were greatly improved. |
| Key words：hollow; CoMn2O4; graphene aerogels; electrochemical performance |
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基金項目：中北大學(xué)化學(xué)工程與技術(shù)學(xué)院研究生科技項目基金。
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作者簡(jiǎn)介：王 琪（1990-），女，山西呂梁人，碩士研究生，研究方向：鋰離子電池電極材料。
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收稿日期：2017-11-08
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