【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。更多还原

【Abstract】 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 m2/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.更多还原