摘要
以FeCl_3·6H_2O和FeCl_2·4H_2O为铁源,以Na OH溶液为沉淀剂,选择共沉淀法制备Fe_3O_4∕石墨烯复合物。以Fe^(2+)和Fe^(3+)的浓度作为变量制得5种不同比例的Fe_3O_4/石墨烯纳米复合材料,然后将所得复合材料压制成电极片,组装成超级电容器后进行循环伏安(CV)、恒电流充放电(GCD)、交流阻抗(EIS)测试,探究Fe_3O_4与石墨烯的含量比对复合材料电化学性能的影响。结果表明,当FeCl_3·4H_2O和FeCl_2·4H_2O用量分别为0.456 g和0.665 g,氧化石墨烯用量为150 mg时,所制备复合材料的电化学性能最佳,比电容可达510 F/g。
FeCl3·6H2O and FeCl2·4H2O as ferrics salt and concentrated Na OH solution as precipitating agent,ferriferrous dioxide/graphene composite materials were synthesized by using co-precipitation method through controlling concentration of Fe2＋and Fe3＋. Their morphologies and phase structures were characterized by X-ray powder diffraction. The composite materials were prepared into electrode sheets,and the electrode sheets were assembled into a symmetric supercapacitor. Then constant-current charge and discharge（ GCD）,cyclic voltammetry（ CV） and AC impedance（ EIS） were used to test their electrochemical properties under the two-electrode system,and the effect of mass ratio of Fe3O4 and graphene on electrochemical performance was studied. Study results indicated that when the quality of FeCl3·4H2O and FeCl2·4H2O were 0. 456 g and 0. 665 g,respectively,and the quality of graphene oxide was 150 mg,the electrochemical property of composite materials is the best,and its specific capacitance was up to 510 F/g.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第12期2263-2265,2268,共4页
Applied Chemical Industry
基金
国家自然基金项目(21503122)
山西大同大学校青年科学基金(2013Q10)
