通过一步电化学剥离法制备的用于氧化还原超级电容器的高电化学性能磷氧化物修饰石墨烯电极
High Electrochemical Performance Phosphorus-Oxide Modified Graphene Electrode for Redox Supercapacitors Prepared by One-Step Electrochemical Exfoliation.
作者信息
Zu Lei, Gao Xing, Lian Huiqin, Cai Xiaomin, Li Ce, Zhong Ying, Hao Yicheng, Zhang Yifan, Gong Zheng, Liu Yang, Wang Xiaodong, Cui Xiuguo
机构信息
School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
出版信息
Nanomaterials (Basel). 2018 Jun 9;8(6):417. doi: 10.3390/nano8060417.
Phosphorus oxide modified graphene was prepared by one-step electrochemical anodic exfoliation method and utilized as electrode in a redox supercapacitor that contained potassium iodide in electrolytes. The whole preparation process was completed in a few minutes and the yield was about 37.2%. The prepared sample has better electrocatalysis activity for I/I₃ redox reaction than graphite due to the good charge transfer performance between phosphorus oxide and iodide ions. The maximum discharge specific capacitance is 1634.2 F/g when the current density is 3.5 mA/cm² and it can keep at 463 F/g after 500 charging⁻discharging cycles when the current density increased about three times.
采用一步电化学阳极剥离法制备了磷氧化物修饰的石墨烯，并将其用作氧化还原超级电容器的电极，该超级电容器的电解质中含有碘化钾。整个制备过程在几分钟内完成，产率约为37.2%。由于磷氧化物与碘离子之间具有良好的电荷转移性能，制备的样品对I/I₃氧化还原反应具有比石墨更好的电催化活性。当电流密度为3.5 mA/cm²时，最大放电比电容为1634.2 F/g，当电流密度增加约三倍后，经过500次充放电循环，其比电容可保持在463 F/g。
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