新型微晶炭与商品活性炭的结构与电容性能  

Structure and capacitive performance of novel crystallite carbon and commercial activated carbon

作　　者：时志强[1] 郭春雨[2] 易炜[2] 刘利[1] 王成扬[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072 [2]中国电子科技集团公司第十八研究所化学与物理电源技术重点实验室,天津300381

出　　处：《电源技术》2009年第5期363-367,共5页Chinese Journal of Power Sources

基　　金：中国博士后科学基金项目(20080430730);中国博士后科学基金特别资助项目(200801213);天津市应用基础及前沿技术研究计划重点项目(08JCZDJC17000)

摘　　要：采用X射线衍射(XRD)和N2吸附法分析了一种新型微晶炭和商品活性炭YP15的晶体结构和孔结构,并采用恒电流充放电对比研究了两者的比电容、比能量及比功率、耐电压和循环性能。结果表明:新型微晶炭的结构不同于商品活性炭,其具有小的比表面积(130.7m2/g)和更明显的晶体特性,其内部含有大量较完整的类石墨晶。微晶炭依靠电解质离子嵌入类石墨晶层间存储能量,在2.7V的电压下工作时具有高达110.6F/g的放电比电容,27.5Wh/kg的比能量和大于1.2kW/kg的比功率,均优于商品活性炭YP15。而且,新型微晶炭能够在3.5V的工作电压下保持良好的电容特性和稳定的循环性能。The structural difference of novel crystallite carbon （NCC） and commercial activated carbon YP15 was analyzed by X-ray diffraction （XRD） and nitrogen adsorption. The capacity, energy density, power density, anti-voltage and cycle performance were compared by galvanostatic charge/discharge. It is found that NCC has different structure, lower surface area （130.7 m^2/g） and more distinct crystallite character than commercial activated carbon. NCC is composed of much well-grown graphite-like crystallite. The energy storage for NCC depends on the intercalation of electrolyte ions into graphite-like crystallite layers. The specific capacitance of NCC is 110.6 F/g, showing specific energy of 27.5 Wh/kg, specific power of over 1.2 kW/kg at operating voltage of 2.7 V, which is better than commercial activated carbon YP15. Moreover, NCC has excellent capacitive behavior and stable cycle performance at high operating voltage of 3.5 V.

关 键 词：微晶炭 类石墨微晶 孔结构 双电层 

分 类 号：TM911[电气工程—电力电子与电力传动]