摘要
采用结晶紫作为碳源,蛭石作为模板,利用模板刻蚀的方法制备具有层状结构的氮掺杂碳纳米片,研究了碳化温度(600℃、700℃、800℃、900℃)对氮掺杂纳米片的结构、形貌和电化学性能的影响。研究结果表明:随着碳化温度增加,碳化的结晶紫层间距先增大后减小,其中经700℃碳化的结晶紫形成了蛭石形貌的薄纱状片层氮掺杂碳纳米片,比表面积为154.614 m^(2)/g;将700℃碳化的样品组装成锂离子电池,在0.1 A/g电流密度下进行恒流充放电测试,可逆容量为410.7 mA·h/g;在2 A/g电流密度下,可逆容量为192.9 mA·h/g;在2 A/g电流密度下循环500次,容量保持率为87.5%。以700℃碳化的样品为负极,活性炭为正极组装成锂离子电容器,功率密度为2 kW/kg,能量密度为58.17 W·h/kg,在1 A/g电流密度下循环300次,容量保持率为56.5%。
Nitrogen-doped carbon nanosheets with layered structure were prepared by template etching using crystal violet as carbon source and vermiculite as template.The effects of carbonization temperature(600℃,700℃,800℃,900℃)on the structure,morphology and electrochemical properties of nitrogen-doped carbon nanosheets were studied.The results show that with the increase of carbonization temperature,the interlayer spacing of carbonized crystal violet increases first and then decreases.The crystal violet carbonized at 700℃ forms a thin gauze-like nitrogen-doped carbon nanosheets with vermiculite morphology,and the specific surface area is 154.614 m^(2)/g.The sample carbonized at 700℃ was assembled into a lithium-ion battery,and the constant current charge and discharge test was performed at a current density of 0.1 A/g.The reversible capacity was 410.7 mA·h/g.At a current density of 2 A/g,the reversible capacity was 192.9 mA·h/g,and the capacity retention rate was 87.5% after 500 cycles at a current density of 2 A/g.The lithium-ion capacitor was assembled with the sample carbonized at 700℃ as the negative electrode and activated carbon as the positive electrode.The power density was 2000 W/kg,the energy density was 58.17 W·h/kg,and the capacity retention rate was 56.5% after 300 cycles at a current density of 1 A/g.
作者
杨芳
杨宇博
张乐珅
杨绍斌
YANG Fang;YANG Yubo;ZHANG Leshen;YANG Shaobin(Ordos Research Institute,Liaoning Technical University,Ordos 017004,China;College of Material Science&Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《辽宁工程技术大学学报(自然科学版)》
北大核心
2025年第6期761-768,共8页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(52474295)
辽宁工程技术大学鄂尔多斯研究院校地科技合作培育项目(YJY-XD-2024-B-002)。
关键词
碳纳米片
蛭石模板法
氮掺杂
结晶紫
锂离子电容器
carbon nanosheets
vermiculite template method
nitrogen doping
crystal violet
lithium ion capacitor
