PVP基多孔炭材料的制备及其电容性能研究
Study on Preparation and Capacitive Performance of PVP-Based Porous Carbon Materials
徐立环 1刘国强 1苏畅1
作者信息
- 1. 沈阳化工大学,辽宁 沈阳 110142
- 折叠
摘要
以聚乙烯吡咯烷酮(PVP)为新型含氮碳源,采用碳化活化法,制备聚合物基氮掺杂多孔炭材料,重点研究了碳化活化温度对制备炭材料的电化学性能和电容器电池性能的影响.研究结果表明:不同的碳化活化温度对制备炭材料的形貌有一定影响,XPS分析证实N元素成功掺杂在制备的炭材料里.在三电极体系下,制备的炭材料在 800℃表现出最佳的电化学性能和电容性能.此温度下制备的炭材料(PVP-800)在0.5 A·g-1 电流密度时,比容量可高达319 F·g-1;在10 A·g-1 电流密度时,材料的比容量为 243 F·g-1,显示出良好的电容性能和倍率性能.在二电极体系下,组成的超级电容器能量密度最高为6.77 W·h·kg-1,在2 A·g-1 的电流密度下循环10 000次后容量保留了最原始的90.7%,体现出优良的比电容性能和循环稳定性.
Abstract
Using polyvinylpyrrolidone(PVP)as a novel nitrogen-containing carbon source,polymer-based nitrogen-doped porous carbon materials were prepared by carbonization activation method.The influence of carbonization activation temperature on the electrochemical and capacitor performance of the prepared carbon materials was studied.The results showed that different carbonization activation temperatures had a certain effect on the morphology of the prepared carbon materials,and XPS analysis confirmed the successful doping of nitrogen in the prepared carbon materials.In the three-electrode system,the prepared carbon material exhibited the best electrochemical and capacitor performance at 800℃.The carbon material(PVP-800)prepared at this temperature had a specific capacitance of up to 319 F·g-1 at a current density of 0.5 A·g-1,and a specific capacitance of 243 F·g-1 at a current density of 10 A·g-1,demonstrating excellent capacitor and rate performance.In the two-electrode system,the energy density of the composed supercapacitor was the highest at 6.77 W·h·kg-1,and after 10 000 cycles at a current density of 2 A·g-1,the capacity retention remained at 90.7%of the original,demonstrating excellent specific capacitance and cycling stability.
关键词
超级电容器/多孔炭材料/PVP/氮掺杂Key words
Supercapacitor/Porous carbon material/PVP/Nitrogen doping引用本文复制引用
出版年
2024
NETL
NSTL
万方数据