CAJ | 학술논문

通过电化学剥离法在石墨棒表面构筑了层数不等、彼此平行且垂直于基底的二维石墨纳米片(GNS)阵列,而后采用阴极还原电沉积法在 GNSs 表面均匀地包覆了一层氧化钌(RuO2·xH2O)薄膜,形成了 RuO2· xH2O/GNS 复合阵列电极.电化学测试表明, RuO2·xH2O/GNS 复合阵列电极具有优良的超电容性能,在0.5 mol·L-1 H2SO4电解质溶液中,扫描速率为5 mV·s-1,电位窗口为0.9 V时,其比电容高达4226 F·m-2,并且具有优异的循环性能,经过20000圈充放电循环后,电容保持率高达94.18%.
통과전화학박리법재석묵봉표면구축료층수불등、피차평행차수직우기저적이유석묵납미편(GNS)진렬,이후채용음겁환원전침적법재 GNSs 표면균균지포복료일층양화조(RuO2·xH2O)박막,형성료 RuO2· xH2O/GNS 복합진렬전겁.전화학측시표명, RuO2·xH2O/GNS 복합진렬전겁구유우량적초전용성능,재0.5 mol·L-1 H2SO4전해질용액중,소묘속솔위5 mV·s-1,전위창구위0.9 V시,기비전용고체4226 F·m-2,병차구유우이적순배성능,경과20000권충방전순배후,전용보지솔고체94.18%.
We used electrochemical exfoliation to construct graphite nanosheet (GNS) arrays, in which the varying number of nanosheet layers were paral el to each other and perpendicular to the carbon substrate. Hydrous ruthenium oxide (RuO2·xH2O) was then loaded directly on the surface of nanosheets using cathodic reduction electrodeposition, resulting in the formation of RuO2·xH2O/GNS composite array electrodes. Electrochemical measurements showed that the composite array electrodes exhibited excel ent capacitive behaviors, and achieved specific capacitance values as high as 4226 F·m-2 in the potential window up to 0.9 V, with a scan rate of 5 mV·s-1 in 0.5 mol·L-1 H2SO4 solution. The RuO2·xH2O/GNS composite array electrodes showed good cycling abilities, and maintained 94.18% of their maximum performance after 20000 cycles.