氧化钴/氮掺杂介孔碳球的制备及其电化学性能研究

Synthesis and electrochemical performance of cobalt oxide/nitrogen-doped mesoporous composite carbon sphere

使用N-乙酰-D-氨基葡萄糖作为碳源,F127作为软模板,乙酸钴作为钴源和催化剂,在水热和高温热解条件下制得了具有较大的比表面积与丰富的介孔尺寸的孔道结构、尺寸为200～500nm的氧化钴/氮掺杂复合介孔碳球。该复合介孔碳球用作电极材料进行电化学测试,在2A/g的电流密度下电容值达到248.75F/g,经过1 000次循环寿命测试后其比电容值还能保留93%,显示出较高的比电容值和较好的循环稳定性,有望在能源存储、催化、吸附等领域得到应用。

The cobalt oxide/nitrogen-doped mesoporous composite carbon spheres with a size of 200-500 nm were obtained after hydrothermal and pyrolysis approach using N-Acetyl-D-glucosamine as carbon source,F127 as soft template,cobalt acetate as cobalt source and catalyst.N-Acetyl-D-glucosamine can self-assemble with F127 and cobalt acetate through the effect of hydrogen bonding.The obtained mesoporous carbon sphere exhibits a large surface area and abundant mesoporous pore structure.The composite mesoporous carbon sphere was applied as an electrode material and found to exhibit a high specific capacitance of 248.75F/g at the current density of 2A/g.Its capacitance can still remain 93%after 1 000 cycle charge and discharge progress which reveals agood cyclic stability.Owning to the excellent performance,the cobalt oxide/nitrogen-doped mesoporous carbon spheres have the potential applications in energy storage,catalysis and adsorption.