α-MnO_2-CNTs-GO复合材料的制备及研究

Preparation and research of α-MnO_2-CNTs-GO composite materials

按1∶1的摩尔比选用过硫酸钾(K_2S_2O_8)和一水合硫酸锰(MnSO_4·H_2O)为原材料并用去离子水溶解,将占总质量5%的CNTs溶入硫酸锰溶液中,并按GO∶CNTs=1∶10的比例加入氧化石墨烯,调节混合溶液的pH值至1,110℃温度下烘干制得α-MnO_2-CNTs-GO复合材料。通过透射电子显微镜(TEM)检测方法分析了碳纳米管被氧化石墨烯分散的机理,分析结果表明,氧化石墨烯和碳纳米管按质量比1∶10的添加量加入后,的确能改善碳纳米管在二氧化锰中的分散效果,可进一步提高其电化学性能,其电极功率密度相较纯α-MnO_2有较大的提高。

According to the molar ratio of 1∶1using potassium persulfate（K2S2O8）and manganese sulfate monohydrate（MnSO4·H2O）as raw materials and dissolved in deionized water,carbon nanotubes（CNTs）dissolved manganese sulfate solution will account for 5% of the total mass,and according to the proportion of GO∶CNTs=1∶10to add graphene oxide（GO）,adjust the pH value of the mixed solution to 1,α-MnO2-CNTs-GO composites prepared by drying at 110 ℃.By transmission electron microscopy（TEM）,the mechanism of the dispersion of graphene oxide（GO）by carbon nanotubes（CNTs）was analyzed.The analysis results show that oxidation in accordance with the quality of graphene oxide（GO）and carbon nanotubes（CNTs）than 1∶10after adding amount to join,can improve the dispersion effect of carbon nanotubes（CNTs）in manganese dioxide,can further improve its electrochemical properties. The electrode power density of the electrode is greatly improved compared with the pureα-MnO2.