A Facile and Template-Free Hydrothermal Synthesis of Mn3O4 Nanorods on Graphene Sheets for Supercapacitor Electrodes with Long Cycle Stability
A Facile and Template-Free Hydrothermal Synthesis of Mn3O4 Nanorods on Graphene Sheets for Supercapacitor Electrodes with Long Cycle Stability
复制标题
DOI：
10.1021/cm203697w
复制
发表时间：
2012-03-27
影响因子：
8.6
通讯作者：
Mallouk, Thomas E.
中科院分区：
文献类型：
--
作者：
Lee, Jeong Woo;Hall, Anthony S.;Mallouk, Thomas E.
以KMnO 4为原料，乙二醇为还原剂，采用简单的水热法制备了石墨烯/Mn 3 O 4复合材料。观察到100 nm至1 μ m长度的Mn 3 O 4纳米棒在石墨烯片上分散良好。为了评估这些材料用于超级电容器的性质，进行循环伏安法和恒电流充电放电测量。石墨烯/Mn 3 O 4复合材料比游离Mn 3 O 4纳米棒具有更快的充放电速度和更高的电容量。以5A/g的充电速率循环10000次后，复合材料的电容保持率为100%。
Graphene/Mn3O4 composites were prepared by a simple hydrothermal process from KMnO4 using ethylene glycol as a reducing agent. Mn3O4 nanorods of 100 nm to 1 mu m length were observed to be well-dispersed on graphene sheets. To assess the properties of these materials for use in super-capacitors, cyclic voltammetry and galvanostatic charging discharging measurements were performed. Graphene/Mn3O4 composites could be charged and discharged faster and had higher capacitance than free Mn3O4 nanorods. The capacitance of the composites was 100% retained after 10 000 cycles at a charging rate of 5 A/g.