以水合肼为还原剂,通过化学还原氧化石墨烯及真空抽滤制备柔性石墨烯纸,并将石墨烯纸制得超级电容电极材料。采用扫描电子显微镜、高倍率透射电子显微镜等手段对样品进行形貌结构表征。采用格子玻尔兹曼方法(LBM),对石墨烯纸孔隙结构中的电解液渗流特性进行数值模拟分析,并研究电解液渗流压力对储能性能的影响。结果表明,在电解液渗流压力从100kPa增大至500kPa条件下,石墨烯纸的润湿率由27.08%提高至85.44%,石墨烯纸的储能比电容达到158F/g。
The graphene paper was fabricated via the hydrate chemical reduction of graphene oxide and vacuum filtration method.The as-prepared samples were investigated by scanning electron microscopy,transmission electron microscopy,etc.Lattice boltzmann simulation was conducted to explore the electrolyte penetration in the graphene paper.The influence of electrolyte penetration pressure on the electrochemical energy storage was also studied.The results indicated that the saturation of graphene paper increased from 27.08% to 85.44% when the penetration pressure changed from 100kPa to 500kPa.Furthermore,the electrode wetted under penetration pressure of 500kPa exhibited a high capacitance of 158F/g.
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