CAJ | 학술논문

以废弃中密度纤维板为原料,通过K2 CO3活化制备活性炭双电层电容器电极。探讨炭化温度(500℃)、碱炭比(K2CO3与炭化物的不同质量比,即2.5、3、3.5和4)、活化温度(800℃)和活化时间(1 h)对电极电化学性能的影响,并对活性炭进行表面化学结构、孔隙性质和电化学性能进行表征。结果表明,经炭化和活化作用,所得活性炭均含有氮元素,含氮质量分数为0.93%~2.86%。在不同质量活化剂K2 CO3的作用下,所得活性炭BET比表面积分别为569~1027 m2/g,不同比表面积活性炭作电极经测试得到不同质量比电容,所得比电容为147~223 F/g。另外,当碱炭比为3.5时,所得活性炭电极的质量比电容和电化学性能最佳,归因于此条件下所制活性炭具有高比表面积和大的孔隙,并含有含氮官能团。
이폐기중밀도섬유판위원료,통과K2 CO3활화제비활성탄쌍전층전용기전겁。탐토탄화온도(500℃)、감탄비(K2CO3여탄화물적불동질량비,즉2.5、3、3.5화4)、활화온도(800℃)화활화시간(1 h)대전겁전화학성능적영향,병대활성탄진행표면화학결구、공극성질화전화학성능진행표정。결과표명,경탄화화활화작용,소득활성탄균함유담원소,함담질량분수위0.93%~2.86%。재불동질량활화제K2 CO3적작용하,소득활성탄BET비표면적분별위569~1027 m2/g,불동비표면적활성탄작전겁경측시득도불동질량비전용,소득비전용위147~223 F/g。령외,당감탄비위3.5시,소득활성탄전겁적질량비전용화전화학성능최가,귀인우차조건하소제활성탄구유고비표면적화대적공극,병함유함담관능단。
N-doped activated carbons for electric double-layer capacitors were prepared from waste medium density fiberboard u-sing K2 CO3 activation. The effects of carbonization temperature, activation temperature, activation time and K2 CO3/coke mass rati-os on surface chemical compositions, pore structure and electrochemical performance of the resulting activated carbons were investi-gated. Results indicated that the activated carbons had nitrogen contents from 0. 93-2. 86%, Brunauer-Emmett-Teller specific surface areas from 569 m2/g to 1 027 m2/g and specific capacitances from 147 F/g to 223 F/g, depending on carbonization and activation conditions. The maximum specific capacitance was attributed to a high surface area, optimum pore size, large pore volume and high N-5 ( the pyrrolic nitrogen and pyridinic nitrogen in association with oxygen functionality) content.