论文部分内容阅读
Octahedral CoO with nanostructures decorated with Ag nanoparticles was prepared via a facile solvothermal approach. After being annealed at 500 ℃ for 1 h, an electrochemical capacitor material of Co_3O_4 decorated with Ag_2O was obtained. The cyclic voltammetry and galvanostatic charge-discharge were used to evaluate the electrochemical properties of the as-prepared products. The results indicated that the as-prepared samples exhibited fine pseudo-capacitive performance, and the surface modifications of Ag_2O can significantly increase the capacitance of the Co_3O_4 material. The specific capacitance of Ag2O/Co_3O_4 composite electrode was up to 217.6 F·g~(-1), which was 3.35 times as high as that of pure Co_3O_4. Moreover, Ag2O/Co_3O_4 composite showed an excellent cycle performance, and 65.3% of specific capacitance was maintained after 200 cycles.
The cyclic voltammetry and galvanostatic charge-discharge were used to evaluate the deposition of Co3O_4 with Ag2O. The cyclic voltammetry and galvanostatic charge-discharge were used to evaluate the electrochemical properties of the as-prepared products. The results indicated that the as-prepared samples exhibited fine pseudo-capacitive performance, and the surface modifications of Ag_2O can significantly increase the capacitance of the Co_3O_4 material. The specific capacitance of Ag2O / Co_3O_4 composite electrode was up to 217.6 F · g -1, which was 3.35 times as high as that of pure Co 3 O 4. Moreover, Ag2O / Co_3O_4 composite showed an excellent cycle performance, and 65.3% of the specific capacitance was maintained after 200 cycles.