【作者】 刘然； 廖孝艳； 杨春； 谢晓峰； 周涛；

【Author】 LIU Ran1,LIAO Xiaoyan1,YANG Chun2,XIE Xiaofeng2,ZHOU Tao1(1 College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China;2 Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 102201,China)

【机构】 中南大学化学化工学院； 清华大学核能与新能源研究院；

【摘要】 为提高石墨毡电极的反应活性,研究影响电极反应活性的关键因素,对石墨毡分别进行了热处理和酸处理。通过极化曲线、循环伏安和交流阻抗考察了石墨毡处理前后以及不同处理方法的抗腐蚀性和电化学性能;并采用XPS、SEM测试研究了处理前后及不同处理方法的石墨毡的表面结构、形貌的变化。实验结果表明:处理后的石墨毡抗腐蚀增强,电化学活性增强,且酸处理的效果较好;处理后的石墨毡纤维的结构遭到不同程度的破坏,导致电阻增大;处理后的石墨毡中C=OOH和C=O的含量增加,可确定其为电极反应活性提高的关键因素。更多还原

【Abstract】 To improve the reactivity of graphite felt electrode,and study the key factors in electrode reactivity,the graphite felt were treated by thermal and acid method.The graphite felts before and after the two treatments were evaluated for their corrosion resistance and electrochemical performance by polarization curves,cyclic voltammetry and AC impedance.The graphite felts surface structure and morphology was studied by XPS and SEM.The results shown that both thermal and acid treatment,the graphite felts were enhanced corrosion resistance,and increased electrochemical activity.Compare to thermal treatment,the acid treatment was more effective.The graphite fiber structures had been damaged to result in resistance increase;the increase of C=OOH and C=O content contribute to an improvement of electrochemical performance.更多还原