氮掺杂多孔石墨碳的制备及储能特性

Synthesis and Energy Storage Properties of Nitrogen-doped Porous Graphite Carbon

摘要:

摘要：为得到高储能特性的超级电容器电极材料，以价格低廉的生物质——海带为碳源、三聚氰胺为氮源，通过聚合-NaOH活化法合成出纳米级氮掺杂多孔石墨化碳材料（NPGC）。通过XRD、BET、Raman和XPS测试手段表征，结果显示：片层结构的NPGC具有大的比表面积（1771 m2/g）、高的氮含量（6.27at%）和良好的石墨化强度（ID/IG:2.84）并对材料进行了循环伏安、恒电流充放电和交流阻抗性能测试，结果表明：在电流密度为1 A/g时,其电容高达267 F/g, 5 000次恒流充放电循环后，其比电容仍为初始电容的99.9%。因此, 该法制备的氮掺杂纳米级多孔石墨化碳具有优异的储能特性。

Abstract:

Abstract：To obtain electrode materials with high performance of supercapacitor, porous graphite carbon with high nitrogen level (NPGC) was prepared via a novel aggregation-NaOH activation route, in which low-cost kelp and melamine severed as carbon and nitrogen source, respectively. The as-prepared samples were characterized by XRD, BET, Raman and XPS. The results showed that the resulting NPGC with a lamellar structure displayed a large surface area of 1771 m2/g and a high graphite degree (ID/IG:2.84) and possessed a high nitrogen content of 6.27at%. In addition, the electrochemical properties of the samples were examined using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). As a result, the specific capacitance of the NPGC material reached up to 267 F/g at 1 A/g. Furthermore, the specific capacitance of the sample was still 99.9% of the initial specific capacitance after 5000 cycles. Thus, the synthesized material had excellent energy storage properties.