以氧化石墨凝胶制备的氧化石墨烯溶胶为前驱体,一步水热法制备三维还原氧化石墨烯,采用XRD、Raman、XPS、SEM和TEM对其结构和形貌进行表征;将其作为超级电容器的电极材料时,采用直接压片法制备工作电极,在三电极体系中测试了材料的超级电容性能.结果表明:经一步水热法对氧化石墨烯溶胶进行还原处理,可去除结构中大部分的含氧官能团,所得三维还原氧化石墨烯呈多孔网状结构,层数为3～7层;比电容在0.5A·g-1的电流密度下可达294 F·g-1,且在1A·g-1电流密度下循环1000次后仍高达247 F·g-1,保持率为88.85％;欧姆电阻Rs约为0.52 Ω,界面电阻Rc约为1.53 Ω.相对于热还原法和化学还原法所制备的石墨烯材料具有更好的超级电容性能.
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