以高长径比的纤维素纳米纤丝(CNF)与片层结构的氧化石墨(GO)为原料,采用乙二胺还原和液氮梯度冷冻干燥制备纤维素纳米纤丝/石墨烯(CNF/rGO)复合气凝胶,并通过红外光谱、X射线衍射、X射线光电子能谱、扫描电镜、比表面积(BET)、电化学测试仪等对其进行性能表征。结果表明,所制备的CNF/rGO复合气凝胶具有完整的三维网络结构,当CNF和GO质量比为10∶1时,复合气凝胶的平均孔径为13nm,比表面积为110.2m2/g,在电流密度为1A/g下获得的质量比电容约为156F/g。
Using high aspect ratio cellulose nanofibrils (CNF) and lamellar graphite oxide (GO) as raw materials,cellulose nanofibrils/graphene (CNF/rGO) composite aerogel was prepared by ethylenediamine reduction and liquid nitrogen gradient freeze-drying.The composite aerogel was characterized by infrared spectroscopy,X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,specific surface area (BET),and electrochemical tester.The results showed that the CNF/rGO composite aerogel had a complete three-dimensional network structure.When the mass ratio of CNF and GO was 10∶1,the composite aerogel had an average pore diameter of 13nm and a specific surface area of 110.2m2/g.The mass specific capacitance obtained at a current density of 1A/g was about 156F/g.
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基金资助
陕西省咸阳市科学技术研究计划项目(2017k02-20);陕西省自然科学基础研究计划项目(2018JM2034)
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