| 溶剂热法合成纳米立方状Co3O4及其电容特性研究 |
| Solvothermal Synthesis and Capacitance Performance of Co3O4 Nanocubes |
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| 摘要: 以聚乙二醇为分散剂，在水-正丁醇体系中采用溶剂热法合成纳米立方状Co3O4。采用IR、XRD和TEM等手段对前驱物及产物的物相和形貌进行表征，对溶剂热法合成Co3O4的反应机理进行初步研究，并以Scherrer公式计算出样品平均晶粒尺寸为21.6 nm。通过循环伏安、恒流充放电、交流阻抗等测试对Co3O4电极的电化学性能进行表征。结果表明，在2 mol·L-1 |
| 关键词: 纳米立方状Co3O4 超级电容器 溶剂热法 |
| 基金项目: |
| Abstract: Co3O4 nanocubes were synthesized by solvothermal method using polyethylene glycol 20 000 as dispersant in water and n-butanol solvent system. The structure and morphology of the precursor and product were charactrized by IR， X-ray diffraction(XRD) and transmission electron microscopy(TEM). The formation mechanism of Co3O4 was also discussed preliminary. The average grain size of the product was 21.6 nm calculated by Scherrer formula. Electrochemical properties of Co3O4 electrode were performed by cyclic voltammetry(CV)， galvanostatic charge/discharge and alternating current(AC) impedance method. The results indicate that the Co3O4 nanocubes show excellent capacitive performance， charge/discharge ability at high current density and cycling stability in 2 mol·L-1 KOH electrolyte in the potential range of -0.4～0.46 V(vs SCE). The initial specific capacitance of single Co3O4 electrode reaches 333.21 F·g-1 and 69% is maintained after 1 000 cycles. The phase transformation of Co3O4 before and after cycling was studied by XRD test. The results indicate that the cubic phase of Co3O4 is maintained after 1 000 cycles. |
| Keywords: Co3O4 nanocubes supercapacitor solvothermal method |
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| 黄可龙,曾雯雯,杨幼平,刘素琴,刘人生.溶剂热法合成纳米立方状Co3O4及其电容特性研究[J].无机化学学报,2007,23(9):1555-1560. |
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