基于植物模板法制备高性能石墨烯/氧化锰复合材料及其电化学性能  

Preparation of High-Performance Graphene/MnO_2 Composite by Plant Biotemplate Method and Its Electrochemical Property

作　　者：何凤娟[1] 钱君超[1] 刘成宝[1] 陈志刚(指导)[1] 李萍[1] HE Feng-juan QIAN Jun-chao LIU Cheng-bao CHEN Zhi-gang LI Ping(Jiangsu Key Laboratory for Environment Functional Materials, School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

机构地区：[1]苏州科技学院化学生物与材料工程学院,江苏省环境功能材料重点实验室,苏州215009

出　　处：《机械工程材料》2017年第1期34-37,42,共5页Materials For Mechanical Engineering

基　　金：江苏省高校自然科学研究重大项目(14KJA430004)

摘　　要：以植物膜作为碳源和模板,通过浸渍氯化锰溶液并经两次煅烧合成了石墨烯/氧化锰复合材料,分析了该复合材料的微观形貌、物相组成以及表面性能;将该复合材料制成电极,通过循环伏安和恒流充放电方法测试了其电化学性能。结果表明:石墨烯/氧化锰复合材料中不存在氧化石墨烯,其石墨烯为褶皱状片层结构,厚度约1.449nm,其上负载着大量粒径为10~40nm的氧化锰颗粒;该复合材料的BET比表面积约为202.5m^2·g^(-1),孔径分布于5~30nm;该复合材料的电化学反应可逆性优良,比电容为245F·g^(-1),远高于市购碳粉(25~26F·g^(-1))和植物膜煅烧制备石墨烯(45~50F·g^(-1))的。A graphene/MnO2 composite was prepared after dipping aplant membrane,which was used as both a carbon source and a template,into the manganese chloride solution and then calcining twice.The micromorphology,phase composition and surface property of the composite were analyzed.Then the composite was pressed to be an electrode and the electrochemical property was measured by cyclic voltammetry and constant current charge-discharge tests.The results show that there was no graphene oxide in the graphene/MnO_2 composite.The graphene showed a lamellar structure with wrinkles on it,whose thickness was 1.449nm;there were lots of MnO_2 particles with the size of 10-40 nm and loaded on the graphene.The BET specific surface area of the composite was 202.5m^2·g^-1 and the pore size was 5-30 nm.The composite had an excellent electrochemical reversibility with the specific capacitance of 245F·g^-1,which was much higher than that of commercial carbon powder（25-26F·g^-1）nd synthesized graphene by the plant membrane calcination（25-26F·g^-1）

关 键 词：石墨烯/氧化锰复合材料 植物模板 表面性能 比电容 

分 类 号：TB33[一般工业技术—材料科学与工程]