多并苯电极过程动力学的研究

要从酚醛树酯热裂可得到多孔多并苯半导体材料,热裂是在氮气氛中严格控制温度进行的。热裂温度和升温速度对多孔多并苯的H/C mo(?)比和导电率有很大影响,用循环伏安法和电化学交流阻抗谱对多孔多并苯的n型和p型掺杂过程进行了研究。循环伏安曲线的形状明显不同于其他导电高聚物。在扫描范围内曲线没有峰值,n型和p型掺杂可以连续转换进行。在充放电过程中,n型和p型掺杂能连续进行,就可提高电池的能量密度。通过电化学阻抗谱的分析,表明多孔多并苯的这个电极过程是由电荷传递反应和离子在固相中的扩散所控制,再结合透射电镜的观察,对离子嵌入多孔多并苯的过程进行了讨论。

Study on Porous Polyacenic Semiconductor Electrode Kinetics

Porous polyacenic semiconductive (PPAS) material has been prepared from pyrolysis of phenol-formaldehyde resin. The pyrolytic treatment has been performed under a fine temperature control in nitrogen atmosphere. The pyrolysis temperature and the accelerating rate of. the temperature have great influence on the H/C molar ratio and the conductivity of PPAS. The n-type and ptype doping characteristics of PPAS electrode material have been investigated by using cycle voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The shape of the CV curve is obviously different from other conductive polymers.There is no peaks over the scanning range. The doping curves for both p-type and n-type doping regions change smoothly and continuously. It can increase the energy density of batteries. Through the analysis of EIS, it is shown that the electrode process of PPAS is controled by charge transfer and ions diffusion in solid. From the impedance measurements and the observation of TEM, the process of ions insertion into PPAS has been discussed.