超声波混浆对活性炭电极电容性能的影响  

Influences of ultrasonic mixing on capacitance behavior of activated carbon electrode

作　　者：易炜[1] 郭春雨[1] 牛永芳[2] 王静[2] 时志强[2] 

机构地区：[1]中国电子科技集团公司第十八研究所化学与物理电源重点实验室,天津300384 [2]天津工业大学材料科学与工程学院改性与功能纤维天津市重点实验室,天津300387

出　　处：《电源技术》2013年第7期1163-1166,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金项目(50902102;51172160);国家高技术研究发展"863"计划项目(2011AA11A232;2013AA050905);天津市应用基础及前沿技术研究计划一般项目(11JCYBJC07500)

摘　　要：以商品活性炭YP-15为电极材料,采用普通搅拌混浆和辅助超声搅拌混浆制备活性炭电极,研究了混浆方式对活性炭电极电容性能的影响。结果表明:与普通搅拌混浆相比,超声波混浆能够提高导电剂在活性炭中的分散性和均匀性,所制活性炭电极具有更佳的综合电化学性能。超声混浆所制备活性炭电极的放电比电容达到98.6 F/g,高于普通混浆活性炭电极的92.2 F/g;由于超声混浆活性炭电极的内阻更小,具有优异的比能量与功率特性,能够实现23.03Wh/kg的最大比能量和大于5 000 W/kg的最大比功率;且具有非常优异的循环性能,经过5 000次循环放电比电容衰减率仅为2.3%。因此,超声辅助混浆是制备高性能超级电容器活性炭电极的一种较为理想的前处理方法。In order to investigate the effect of slurry mixing mode on the capacitance performance of activated carbon（AC） electrode,YP-17 was treated by stirring and ultrasonic agitation to prepare the AC electrode,respectively.It is suggested that ultrasonic can dramatically improve the dispersion and uniformity of conductive agent in activated carbon which contributes to the better electrochemical performance,in comparison with normal stirring.The AC electrode prepared by ultrasonic shows a discharge specific capacity of 98.6 F/g,which is higher than that of 92.2 F/g by stirring method.Due to the lower residence of AC electrode made by ultrasonic method,it shows an excellent energy density of 23.03 Wh/kg and a power density above 5 000 W/kg.Moreover,it presents excellent long cycle life with high discharge capacity retention of 97.7% after 5 000 cycle.Therefore,ultrasonic is a promising pre-treatment mode for preparing high performance super capacitor with AC as electrode materials.

关 键 词：超声波 超级电容器 活性炭 比功率 

分 类 号：TM53[电气工程—电器]