电化学还原处理对碳纸形貌和电化学电容的影响（英文）

Electrochemical Reduction Effects on the Morphology and Electrochemical Capacity of Carbon Paper

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.

We studied the changes in the morphology and electrochemical capacity of carbon paper caused by the electrochemical reduction. SEM images show that the electrochemical reduction caused the decomposition of reduced carbon papers（rCPs） into carbon particles and rough surface. Raman spectra show the surface disorder as evidenced by higher ID/Ic ratio for treating time as short as 1 min. BET tests reveal the markedly increased specific surface area caused by the electrochemical reduction of carbon paper. XPS analyses show a higher quantity of surface hydroxyl species（C--OH） on rCPs. The capacitance of rCP（treated at -1.6 V for 5 min） is 15 times that of the pristine car- bon paper, and this outstanding capacitance is rather stable even after prolonged charge-discharge 1500 cycles.