摘要
以自制的纳米孔玻态炭(NPGC)为样品,采用循环伏安法研究了NPGC电极在KOH电解液中的电化学行为。结果表明,受OH-水化和不可逆副反应的影响,正极的电容低于负极。不可逆副反应主要为析氧和表面官能团参与的反应,经过初始的几次循环之后,表面官能团的影响可基本消除。析氧和OH-水化的影响,则可通过调整电压范围、增大电解液浓度和扩孔等措施,尽可能加以避免。
The nanoporous glassy carbon （NPGC） prepared by ourselves was employed as sample to study the electrochemical performance of carbon electrode in KOH solution by cyclic voltammetry method. The results showed that the capacitance of positive electrode was lower than that of negative electrode due to hydration of OH- and irreversible side reactions. The main irreversible side reactions were oxygen evolution and reactions of surface functional groups which could almost be eliminated after first a few cycles. The influences of oxygen evolution and hydration of OH^- could be avoided as possible as could by measures such as adjusting the voltage range, increasing the concentration of electrolyte, enlarging the pore size of carbon electrode.
出处
《电池》
CAS
CSCD
北大核心
2006年第5期329-331,共3页
Battery Bimonthly
基金
国家自然科学基金重点项目(20633040)
关键词
炭电极
双电层电容
电解液
carbon electrode
double layer capacitor
electrolyte
