一步法氮掺杂多孔炭制备及其电容性能  

Preparation and capacitance of nitrogen-doped porous carbon by one-step method

作　　者：蔡江涛[1,2] 兰雨金 陈晨 周彬[1] 覃彪 朱由余 赵世永 张亚婷[1,2] CAI Jiangtao;LAN Yujin;CHEN Chen;ZHOU Bin;QIN Biao;ZHU Youyu;ZHAO Shiyong;ZHANG Yating(College of Chemistry&Chemical Engineering,Xi'an University of Science&Technology,Xi'an 710054,Shaanxi,China;Key Laboratory of Coal Resources Exploration&Comprehensive Utilization,Ministry of Natural Resource,Xi'an 710021,Shaanxi,China;College of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710129,Shaanxi,China)

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054 [2]自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710021 [3]西北工业大学化学与化工学院,陕西西安710129

出　　处：《陕西师范大学学报（自然科学版）》2023年第4期97-107,共11页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(52102051);陕西省重点研发计划(2022GY-168);榆林市科技计划(CXY-2022-155);西安科技大学化工安全重点专项(2040422042)。

摘　　要：以酚醛树脂为碳源,聚氨酯海绵为氮源和炭支撑骨架,通过KOH水溶液为活化致孔剂,采用一步法碳化、活化制备氮掺杂多孔炭(nitrogen-doped porous carbon,NPC)。研究了氮掺杂及KOH不同添加量对NPC结构和电容性能的影响。结果表明:NPC-2.0(KOH用量为2.0 g)具有较高的比表面积(1195 m^(2)/g)和孔体积(0.788 cm^(3)/g)。在三电极体系中,0.2 A/g电流密度下,NPC-2.0比电容可达377 F/g,循环8000次电容保持率仍具有96.8%。两电极体系中,NPC-2.0组装的对称电容器在功率密度为125 W/kg时,能量密度可达6.05 W·h/kg,且充放电10000次后的电容保持率为96.0%。通过一步法原位氮掺杂所得NPC-2.0表现出良好的电容性能,且制备流程短,具有广阔的研发应用前景。Nitrogen-doped porous carbon(NPC)was prepared by one-step carbonization and activation using phenolic resin as carbon source,polyurethane sponge as nitrogen source and carbon supporting framework,and KOH aqueous solution as activation pore-causing agent.The effects of nitrogen doping and different amounts of KOH on the structure and capacitance of NPC were studied.The results show that NPC-2.0(The amount of KOH used in the raw material was 2.0 g)has high specific surface area(1195 m 2/g)and pore volume(0.788 cm 3/g).In the three-electrode system,the specific capacitance of NPC-2.0 can reach 377 F/g at 0.2 A/g current density.The capacitance retention rate after 8000 cycles is still 96.8%.In the two-electrode system,the energy density of the symmetrical capacitor assembled by NPC-2.0 can reach 6.05 W·h/kg while the power density is 125 W/kg,and the capacitor retention rate after 10000 times of charging and discharging is 96.0%.NPC-2.0 obtained by one-step in-situ nitrogen doping shows good capacitive performance,and the preparation process is simple,which has broad research and application prospects.

关 键 词：一步法 氮掺杂 多孔炭 KOH 超级电容器 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]