HAP模板法制备有序多孔炭材料及其电性能研究

Preparation and capacitive properties of ordered porous carbons by HAP template

利用纳米羟基磷灰石(HAP)为模板,麦芽糖(MO)为碳源,通过固化、炭化等过程,制备有序多孔炭材料(HAP-C)。采用扫描电镜(SEM)、N2吸/脱附以及电化学分析方法等对HAP-C进行物理表征和电化学性能分析。结果显示,HAP/MO的质量比对HAP-C的比表面积、孔结构以及电化学性能有着重要影响。制备的多孔炭呈海绵骨架结构,具有较高的比表面积(1 073.5 m2/g)和大的孔容(3.28 cm3/g)。电化学测试显示,当HAP/MO的质量比为1∶2(HAP-C-1∶2)时,具有较高的质量比电容,在扫描速度为5 m V/s时,质量比电容达198 F/g;倍率性能测试显示,当电流密度增大25倍时,质量比电容保持率为58.0%,显示出良好的倍率性能。

Ordered porous carbons(HAP-C) were synthesized via a synchronous carbonization, with maltose(MO) as carbon precursor and hydroxyapatite(HAP) as template. The morphology structure and electrochemical performance of the HAP-C were characterized by means of scanning electron microscopy(SEM), N2 adsorption-desorption and electrochemical analytical method. The results indicate that the ratios of HAP/MO have a strong influence on the specific surface area, textrural properties and electrochemical performance of the prepared porous carbons. The prepared porous carbons exhibit spongeous structure, with high specific surface area(1 073.5 m2/g) and high total pore volume(3.28 cm3/g). The HAP-C-1∶2 prepared at w(HAP) to w(MO) rate of 1∶2 has well electrochemical performance and exhibits the highest specific capacitance, reaching to 198 F/g at a scan rate of 5 mV/s. The HAP-C-1∶2 of specific capacitance maintenance achieve 58.0% while the current density enlarges 25 times, which exhibits good rate performance.