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对电化学还原处理过程中碳纸的形貌和电容的变化进行了研究.扫描电子显微镜观测结果显示电还原使碳纤维分解为碳颗粒,并且表面粗糙度增加.拉曼光谱结果显示ID/IG的比值在还原处理1 min后即出现改变,表明碳纸无序度增加.BET测试结果显示电还原处理后碳纸的比表面积明显增加.X射线光电子能谱结果表明还原处理后碳纸表面羟基的数量随之增加.此外,在-1.6 V下还原5 min后碳纸电容增加到原来的15倍,并在1500个循环的稳定性测试中保持不变,显示出良好的稳定性.
The morphology and capacitance change of carbon paper during the electrochemical reduction process were studied.The results of scanning electron microscopy showed that the electrical reduction led to the decomposition of carbon fiber into carbon particles and the surface roughness increased.The results of Raman spectroscopy showed that the ID / The ratio changed after 1 min of reduction treatment, indicating that the disorder degree of carbon paper increased.BET test results showed that the specific surface area of carbon paper significantly increased after electro-reduction treatment.X-ray photoelectron spectroscopy results showed that the hydroxyl group on the surface of carbon paper after reduction treatment In addition, the carbon paper capacitance increased by 15 times after 5 min reduction at -1.6 V and remained unchanged at 1500 cycles of stability test, showing good stability.