利用办公废纸制备活性炭基超级电容器  

Preparation of activated carbon-based supercapacitors by office waste paper

作　　者：岳正波[1] 高旭 王策 潘子煜 佘智祥 陈明珠 YUE Zhengbo;GAO Xu;WANG Ce;PAN Ziyu;SHE Zhixiang;CHEN Mingzhu(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2020年第4期552-558,共7页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省大学生创新创业训练计划资助项目(2017CXCYS150)。

摘　　要：文章以办公室废纸为基质材料制备活性炭基超级电容器,研究碳化温度、活化温度、碱炭比对超级电容器性能的影响。首先通过采用预碳化、KOH活化的方法,按照正交试验设计制备得到活性炭,并进一步优化条件制备得到超级电容器电极材料;然后利用电化学、BET比表面积测试、扫描电子显微镜(scanning electron microscope,SEM)分析、X射线衍射(X-ray diffraction,XRD)分析、X射线光电子能谱分析(X-ray photoelectron spectroscopy,XPS)、傅里叶红外光谱分析(Fourier transform infrared spectroscopy,FT-IR)等分析手段,对活性炭和超级电容器电极材料进行表征。结果表明:在500℃碳化、650℃活化,碱炭比4∶1条件下制备的纸屑活性炭比表面积达到了2945 m2/g,且具有以微孔为主的大孔-介孔-微孔三级孔道结构。在6 mol/L KOH、电流密度1 A/g下,超级电容器比电容达到297 F/g,在10 A/g的电流密度下循环2500圈后比电容保持率为94.5%,表现出优良的超级电容器电化学性能。In this paper,office waste paper was used as the host material to prepare activated carbons via a method of pre-carbonization and KOH activation combined with the orthogonal experimental design,and the process parameters such as carbonation temperature,activation temperature and alkali/carbon ratio were investigated.They were used as electrode materials of supercapacitors by further optimization.Electrochemistry,BET,scanning electron microscope(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and Fourier transform infrared spectroscopy(FT-IR)analysis methods were used to characterize the activated carbon and supercapacitors.The results showed that under the condition of carbonization at 500℃,activation at 650℃and alkali/carbon ratio of 4∶1,the activated carbon prepared had a specific surface area as high as 2945 m2/g,and had three-stage open-framework structure of macropore-mesopore-micropore with micropore mainly.The activated carbon-based supercapacitors reached a very high specific capacitance(297 F/g)in 6 mol/L KOH at 1 A/g,and had good recyclability(94.5%after 2500 cycles)at 10 A/g,which showed excellent electrochemical performance.

关 键 词：超级电容器 活性炭 储能 双电层电容器 固体废物 

分 类 号：X793[环境科学与工程—环境工程]