CAJ | 학술논문

采用微波对氢氧化钾活化石油焦制备的活性炭进行处理,考察了微波处理时间对活性炭的孔结构、表面(官能团)性质和电化学电容器中活性炭电化学性能的影响.结果表明:微波处理后活性炭的比容和内阻随着其比表面积和总孔容的降低而变小.和采用常规加热方式在1073K下处理1h所得活性炭相比,在700w功率下仅处理7 min所得活性炭的孔结构就具有较高的大/中孔的孔容比和较高的羰基含量；该活性炭用作电化学电容器的电极时,具有较高的能量密度和较高的能量保持率.显然,微波处理是制备电化学电容器用活性炭的一种简单而有效的方法.
채용미파대경양화갑활화석유초제비적활성탄진행처리,고찰료미파처리시간대활성탄적공결구、표면(관능단)성질화전화학전용기중활성탄전화학성능적영향.결과표명:미파처리후활성탄적비용화내조수착기비표면적화총공용적강저이변소.화채용상규가열방식재1073K하처리1h소득활성탄상비,재700w공솔하부처리7 min소득활성탄적공결구취구유교고적대/중공적공용비화교고적탄기함량；해활성탄용작전화학전용기적전겁시,구유교고적능량밀도화교고적능량보지솔.현연,미파처리시제비전화학전용기용활성탄적일충간단이유효적방법.
Activated carbons (ACs) made from petroleum coke by KOH activation were further treated by microwaves to investigate the effect of microwave-treatment time on the pore structure,the surface properties ( functional groups)and the electrochemical properties of the as-made ACs for electrochemical capacitors (ECs).Results show that the specific capacitance and the equivalent series resistance of microwave-treated ACs become smaller with a decrease in the Brunauer-Emmett-Teller surface area and the total pore volume (vt) of the treated ACs.Compared with the AC sample heated at 1073K for lh by a conventional heating method,the AC sample treated by microwaves at 700W for only 7min has a pore size distribution with a high ( meso- and macropore volume)/vt ratio and a high carbonyl content,and exhibits a high energy density and powder density as an electrode of ECs.This has clearly shown that the microwave-treatment is a simple and efficient atproach to obtain high-tperformance ACs for ECs.