摘要
作者将天然石墨和聚丙烯的混合热压成型物(CPP)作为电极活性物质,在浓 H_2SO_4电解质中,用循环伏安法和恒电流法,进行了阳极嵌入化和过氧化。在嵌入反应电压范围内,氧化(嵌入)还原(嵌出)反应基本可逆;但在过氧化电压范围内,过程的可逆性变,差氧化还原峰对的电位差也变大,用小的恒电流对 CPP 进行氧化,可以得到 C_(2·7)A 型的石墨过氧化物,其氧化度达0.37,且反应尚有一定的可逆性。
Carbon-polypropylene(CPP),which is made from the mixture of natural graphite and polypropylene through hot pressing,as an anodic ac- tive matter is intercalated and over-oxidied in thick sulfuric acid ele- ctrolyte with the cyclic voltammetre methode and the galvanostatic meth- ode.In the region of intercalation,the oxidation(intercalation)and the reduction(deintercalation)are basically reversible,but in the region of overoxidation,the reversibility of the reactions become worse and the different between the oxido-reduction peak potential coupples also be- comes greater.A graphite oxidate,like C_(2.7)A which has a oxidisability of 0.37,is formed by oxidating of CPP.The Reaction possesses a certain reversibility.
关键词
石墨
碳
电化学
阳极
氧化
嵌入
Graphite intrastratal compound
Graphite peroxidate
Electochemical anodie oxidation
