铅笔芯电化学剥离制备纳米石墨片及其电容性能研究  

Study on electrochemical exfoliated nano graphite sheet from pencil lead and its capacitance performance

作　　者：王鑫 黄静 黄喜 李胜 杨洋[1,2] WANG Xin;HUANG Jing;HUANG Xi;LI Sheng;YANG Yang(School of Chemical Engineering,Guizhou Minzu University,Guiyang 550025,China;School of Materials Science and Engineering,Guizhou Minzu University,Guiyang 550025,China;Guizhou Zhenhua Electronic Information Ltd,Guiyang 550018,China)

机构地区：[1]贵州民族大学化学工程学院,贵州贵阳550025 [2]贵州民族大学材料科学与工程学院,贵州贵阳550025 [3]贵州振华电子信息产业研究有限公司,贵州贵阳550018

出　　处：《化学研究与应用》2023年第6期1468-1474,共7页Chemical Research and Application

基　　金：国家自然科学基金项目(51801039)资助;贵州省省级科技计划项目(黔科合基础-ZK[2021]一般242;黔科合基础-ZK[2021]一般305)资助;贵州省高等学校绿色化学与资源环境创新团队(黔教技[2022]13号)资助。

摘　　要：本文采用电化学法剥离了不同型号的铅笔芯(HB,2B,4B,6B,8B和10B),来制备纳米石墨片。利用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察表面形貌和微观结构、X射线衍射(XRD)和拉曼光谱(Raman)分析物相组成,在[Fe(CN)_(6)]^(3-/4-)溶液中测试了剥离材料的活性表面积。结果表明:不同型号铅笔芯剥离后均为片层状的纳米石墨片(GNS)。其中4B铅笔芯剥离的纳米石墨片(4B-GNS)的石墨化程度最高、活性表面积最大、电容性能最高,其比电容可达到140.3 F/g,且经过10000次循环充放电之后,比电容仍保持为原来的99.06%,表现出优异的循环稳定性。In this paper,different types of pencil leads(HB,2B,4B,6B,8B and 10B)were electrochemically exfoliated to prepare nano graphite sheet.Scanning electron microscope(SEM)and transmission electron microscope(TEM)were employed to observe surface morphology and microstructure,X-ray diffraction(XRD)and Raman spectroscopy(Raman)were used to analyze the phase composition,the active surface area of the exfoliated materials were tested in[Fe(CN)_(6)]^(3-/4-)solution.The results shown that all of the exfoliated materials are lamellar and featured with nano graphite sheet(GNS)structure.Among them,the 4B pencil lead exfoliated nano graphite sheet(4B-GNS)has the highest degree of graphitization,the largest active surface area,the highest capacitance performance,and its specific capacitance can reach 140.3 F/g.Moreover,after 10,000 cycles of charge and discharge,the specific capacitance remains at 99.06%of the original,showing excellent cycle stability.

关 键 词：铅笔 纳米石墨片 电化学剥离 电容性能 

分 类 号：O614.4[理学—无机化学]