活性炭在铵盐电解液中的电容性能  

Capacitance performance of activated carbon in ammonium electrolytes

作　　者：刘利[1] 时志强[1] 姚国富 陈明鸣[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]武汉船用电力推进装置研究所,湖北武汉430064

出　　处：《电池工业》2009年第5期328-332,共5页Chinese Battery Industry

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

摘　　要：采用商品活性炭RP20为原料,以1mol/LTEMABF4/PC和TEABF4/PC作电解液组装纽扣型电容器;采用循环伏安、交流阻抗和恒电流充放电考察对称和非对称铵盐电解液对活性炭电极电容性能的影响。结果表明:非对称铵盐电解液TEMABF4/PC由于具有更高的电导率和更小的离子尺寸,具有比对称铵盐电解液TEABF4/PC更大的放电电容和更好的功率性能。活性炭(RP20)电极在TEMABF4/PC电解液中具有最高可达108.0F/g的放电比电容和27.3Wh/kg的比能量,并具有大于1.29kW/kg的比功率和良好的循环性能。The coin type capacitor was assembled by using activated carbon RP20 as raw material, 1 mol/L TEMABF4 （triethylmethylammonium tetrafluoborate） and TEABF4 （tetraethylammonium tetrafluoborate） dissolved in PC used as electrolytes. The effects of symmetric and asymmetric ammonium electrolyte on the capacitance performance of activated carbon electrode were studied by cycle voltammetry, AC impedance and galvanostatic charge/discharge. It was found that the asymmetric electrolyte TEMABF4/PC had higher discharge capacitance and better power performance than that of symmetric electrolyte TEABF4/PC, due to its higher conductance and smaller ion size. The specific capacitance of activated carbon （RP20） was 108.0 F/g, showing specific energy of 27.3 Wh/kg, specific power of over 1.29 kW/kg and excellent cycle stability in TEMABF4/PC electrolyte.

关 键 词：电化学电容器 铵盐电解液 对称与非对称 电容特性 

分 类 号：TM2[一般工业技术—材料科学与工程] TM912.9[电气工程—电工理论与新技术]