一步乙醇燃烧法合成C-CeO2超级电容器电极材料

One-step ethanol combustion synthesis of C-CeO2 for supercapacitor materials

通过硝酸铈的乙醇溶液燃烧一步合成了含有微量碳的二氧化铈纳米材料(C-CeO2)。电化学测试结果表明,C-CeO2纳米材料在1A/g电流密度时的比电容为125F/g,是相同条件下纯CeO2纳米材料比电容(55F/g)的2.3倍。另外,C-CeO2纳米材料在循环充放电测试1 000次后的比电容保持率高达83%。

Carbon incorporated ceria nanomaterials (C-CeO2) are prepared by combusting ethanol solution of cerium nitrate in one step.The successful fabrication of C-CeO2 nanomaterials is confirmed by the characterizations of crystal phase and morphology.The electrochemical measurements demonstrate that the specific capacitance value of the prepared C-CeO2 can reach 125 F·g^-1 at a current density of 1 A·g^-1,which is 2.3 times that of pure CeO2 nanomaterials (55 F·g^-1).Moreover,the prepared C-CeO2 nanomaterials remain 83% of the initial capacitance after 1,000 cycles of charge/discharge test.