Nanostructured hexagonal cobalt oxide plates and their electrochemical properties

作者：Zhou, Xing^*; Chen, Feng; Cao, Feng; Shen, Wei; Liu, Jiali; Xu, Xingwang

来源：Materials Letters, 2016, 180: 175-178.

DOI：10.1016/j.matlet.2016.05.136

• Electrical materials
• Microstructure
• Cobalt oxide
• Electrochemical

Hexagonal Co3O4 plates have been synthesized using a simple solvothermal method by tuning the NaOH concentration and initial Co2+ ion sources. XRD and HRTEM analyses revealed pure phase of Co3O4 plates. SEM and TEM studies showed the Co3O4 materials possess hexagonal shapes with average thickness of 23 nm and edge length of 110 nm approximately. The effects of reacting NaOH concentration and initial Co2+ ion sources were investigated by a series experiments. It was found that the NaOH concentration played an important role for the formation of such novel cobalt oxide. When the NaOH concentration of the mixture was as low as 0.2 M, the morphology of final products can changed from hexagonal plates to particles. The observed better electrochemical properties of the hexagonal Co3O4 plate were attributed to the unique hexagonal plate architecture. Due to the specific structure and electrochemical properties, these hexagonal Co3O4 plates are expected to have potential applications as candidates for catalysis, sensor and energy storage.

• 出版日期2016-10-1
• 单位中北大学; 苏州科技大学