CAJ | 학술논문

通过多种电化学测试技术评价了石墨电极在2.3 mol/L H2 SO4溶液中的电化学活化工艺及其准电容性能。结果表明,活化工艺宜采用恒电流阶跃技术,最佳工艺参数为：阳极电流密度为200 mA·cm-2,阴极电流密度为-120 mA·cm-2,对应活化时间分别为300 s和100 s,循环6次。改性后的石墨电极表面形成了多孔、粗糙的三维活性层,单位面积上具有较高的电容量(2.08 F·cm-2)和良好的倍率特性,可作为一种优异的准电容器材料。
통과다충전화학측시기술평개료석묵전겁재2.3 mol/L H2 SO4용액중적전화학활화공예급기준전용성능。결과표명,활화공예의채용항전류계약기술,최가공예삼수위：양겁전류밀도위200 mA·cm-2,음겁전류밀도위-120 mA·cm-2,대응활화시간분별위300 s화100 s,순배6차。개성후적석묵전겁표면형성료다공、조조적삼유활성층,단위면적상구유교고적전용량(2.08 F·cm-2)화량호적배솔특성,가작위일충우이적준전용기재료。
A graphite electrode ( GE) was modified in a 2. 3 mol/L H2 SO4 solution using GE as a working electrode, Pt as a counter electrode andsaturatedcalomelelectrode ( SCE) as a reference electrodeby a galvanic method under a constant current. Results showed thatafter the GE was optimally modified at a current of 200 mAfor 300 s and -120 mA for 100 s for 6 cycles, it had a porˉ ous, rough and threeˉdimensional active layer with a pseudo capacitance of 2. 08 F/cm2 . The modified GE had a much lower resistˉ ance and higher sweep rate than the unmodified one.