摘要
以农林废弃物刀豆壳为原料,首先以低温炭化和KOH高温活化两步法制备高比表面积活性炭,进而以四水合五硼酸铵为硼源、氮源通过水热合成反应制备得到硼/氮共掺杂多孔炭材料。通过扫描电镜、透射电镜、氮气吸附-脱附、电感耦合等方法对材料的结构和化学特性进行表征,并采用三电极系统测试其电化学性能。研究结果表明:掺杂后的活性炭材料最大比表面积可达2859 m^(2)/g,总孔容1.34 cm^(3)/g,微孔孔容0.99 cm^(3)/g,最高硼质量分数为3.27%,氮质量分数为2.60%。基于杂原子的引入和适宜的孔隙结构的共同作用,掺杂后的活性炭材料在电流密度1 A/g条件下比电容最高达369 F/g,相应的20 A/g电流密度条件下的质量比电容为240 F/g,倍率性能优异。
The high surface area activated carbon was produced firstly by a simple two-step process of carbonization and KOH activation using forestry and agricultural residues sword bean shells as precursor.Furthermore,the N and B co-doped hierarchical porous carbon was prepared by hydrothermal post-treatment process using ammonium pentaborate tetrahydrate(NH_(4)B_(5)O_(8)·4H_(2)O)as nitrogen and boron source.The scanning electron microscopy,transmission electron microscopy,nitrogen adsorption/desorption isotherm and inductive coupled plasma emission spectrometer were used to investigate the morphological,structural and chemical properties.Meanwhile,the electrochemical performance was tested by a three-electrode system.The results showed that the maximum specific surface area,total pore volume,and micropore volume of the doped activated carbons could reach 2859 m^(2)/g,1.34 cm^(3)/g,and 0.99 cm^(3)/g,respectively.The boron and nitrogen contents were 3.27%and 2.60%.The B and N co-doped activated carbon materials possessed excellent rate performance.Due to the synergistic effect of heteroatoms doping and also appropriate texture properties,the maximum specific capacitances were 369 and 240 F/g at the current density of 1 and 20 A/g,respectively.
作者
罗路
罗凌聪
邓剑平
陈婷婷
范毜仔
杜官本
赵伟刚
LUO Lu;LUO Lingcong;DENG Jianping;CHEN Tingting;FAN Mizi;DU Guanben;ZHAO Weigang(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350018,China;College of Engineering,Design and Physical Sciences,Brunel University,London UB8 3PH,United Kingdom;College of Material Science and Engineering,Southwest Forestry University,Kunming 650224,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2021年第6期43-50,共8页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(31971593)
福建省自然科学基金资助项目(高校联合资金)(2019J01386)
福建农林大学科技创新专项基金项目(CXZX2019103)。
关键词
刀豆壳
四水合五硼酸铵
活性炭
比表面积
微孔孔容
sword bean shell
ammonium pentaborate tetrahydrate
activated carbon
specific surface area
micropore volume
