摘要
以柳絮为碳的前驱体,采用KOH活化和氨气氛围高温碳化两步法制备了生物质氮掺杂多孔碳材料。通过扫描电子显微镜、X射线衍射、拉曼光谱和X射线光电子能谱等方法对材料进行结构表征,结果表明,该碳材料含有较高的氮元素,具有丰富的多孔结构,是一种非常优异的活性炭材料。电化学测试结果表明,KOH活化时间为8 h时所制备的碳电极材料具有最优的电化学性能,其质量比电容为317 F·g^(-1)(电流密度为1 A·g^(-1)),并且该材料具有非常优异的倍率性能,在电流密度为10 A·g^(-1)时具有220 F·g^(-1)的比电容;此外,该材料还具有非常优异的循环稳定性,在10000次充放电循环后容量保持率为99. 5%。
Willow catkins were used as the raw materials to prepare nitrogen doped porous carbon by means of KOH chemical activation process and subsequently high temperature carbonization under ammonia atmosphere.The structure and morphology were characterized by SEM,XRD,Raman spectra and XPS etc.The results show that excellent activated carbon materials were obtained with high nitrogen dopant concentration and large porosity.The carbon material prepared by KOH activation for 8 hours has the best electrochemical performance with specific capacitance of 317 F·g-1 at 1 A·g-1,which remains 220 F·g-1 at 10 A·g-1.In addition,the electrode demonstrates super cycling stability with only 0.5%capacitance loss after 10000 cycles.
作者
林烨
姚路
吴登鹏
张亚非
LIN Ye;YAO Lu;WU Dengpeng;ZHANG Yafei(Key Laboratory for Thin Film and Microfabrication of the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2018年第10期13-21,共9页
Electronic Components And Materials
基金
国家自然科学基金(61574091)
关键词
生物质
柳絮
氮掺杂
活性炭
超级电容器
电极材料
biomass materials
willow catkin
nitrogen doping
activated carbon
supercapacitor
electrode material
