CAJ | 학술논문

以酚醛树脂、煤沥青泡沫炭为原料,经水蒸气活化制得比表面积分别为961和953m2/g的活性泡沫炭.采用扫描电镜、BET吸附仪、恒流充放电法和循环伏安法对两种活性泡沫炭的结构进行了表征并研究其充放电性能.结果表明,酚醛树脂泡沫炭在1.0nm以下的孔较煤沥青泡沫炭丰富.在1.0mA充放电时,两者的充放电容量分别为106.28和105.1F/g,相差不大,当充放电电流增大到50mA时,前者容量为41.94F/g,后者为17.23F/g.可见,微孔的孔径分布对充放电性能具有很大影响,增大微孔的孔径有利于提高活性炭电极的充放电容量和功率.循环伏安法测试表明在100mV/min扫描速率下酚醛树脂泡沫炭粉的电化学窗口大于煤沥青泡沫炭粉.
이분철수지、매력청포말탄위원료,경수증기활화제득비표면적분별위961화953m2/g적활성포말탄.채용소묘전경、BET흡부의、항류충방전법화순배복안법대량충활성포말탄적결구진행료표정병연구기충방전성능.결과표명,분철수지포말탄재1.0nm이하적공교매력청포말탄봉부.재1.0mA충방전시,량자적충방전용량분별위106.28화105.1F/g,상차불대,당충방전전류증대도50mA시,전자용량위41.94F/g,후자위17.23F/g.가견,미공적공경분포대충방전성능구유흔대영향,증대미공적공경유리우제고활성탄전겁적충방전용량화공솔.순배복안법측시표명재100mV/min소묘속솔하분철수지포말탄분적전화학창구대우매력청포말탄분.
Two kinds of activated carbon were obtained from phenolic resin and coal tar pitch carbon foams by vapor activation,with specific surface area of 961 and 953m2/g respectively.Their morphology and pore structure were characterized with scanning microscope and BET nitrogen adsorption instrument,while the charge discharge performance was investigated by constant current and cyclic voltammetry methods.The results showed that,the phenolic sample owns more abundant and larger micropores under 1.0nm than the pitch's.The larger micropore size benefited its charge discharge performance especially at higher current.Working at 1.0mA,the two samples showed similar capacitance,which was 106.28 and 105.1F/g for the phenolic and the pitch's respectively.However,when working at 50mA,they performed much differently,the capacitance for the phenolic and the pitch's decreased to 41.94 and 17.23F/g respectively,showing that the micropores under 1.0nm obviously effected on the performance of the anode material.Cyclic voltammetry test showed the electrochemical window for phenolic carbon was wider than that of pitch carbon at 100mV/min.