水系正极中碳纳米管含量对Li-MnO_2电池性能的影响  

Effect of carbon nanotube content in aqueous positive on performance of Li-MnO_2 battery

作　　者：苏翔[1] SU Xiang(Sichuan Vocational College of Chemical Technology,Luzhou Sichuan 646005,China)

机构地区：[1]四川化工职业技术学院,四川泸州646005

出　　处：《电源技术》2018年第10期1496-1499,共4页Chinese Journal of Power Sources

摘　　要：采用水系匀浆,将碳纳米管、二氧化锰等在乙醇水溶液中搅拌均匀,涂布于铝箔上制得不同碳纳米管质量分数的正极片,然后制备CR123A型锂-二氧化锰电池。60℃高温搁置7 d后,锂-二氧化锰电池平均内阻随着碳纳米管质量分数升高而降低,开路电压则无明显规律。在-25℃下碳纳米管质量分数较低的电池放电性能差,放电曲线出现明显的电压滞后。随着碳纳米管质量分数升高,电压滞后减弱,放电中值电压升高。碳纳米管质量分数越高,电池的大电流放电性能越好。Using the aqueous slurry stirring method,carbon nanotube(CNT)and MnO2 were well dispersed in aqueous alcohol,and coated on aluminum foil to prepare the positive electrode of different carbon nanotubes mass fraction,then CR123A Li-MnO2 battery was prepared.After 7 d storage at 60℃,the internal resistance of Li-MnO2 battery decreased with the content of CNT increasing,and open circuit voltage(OCV)had no regularity.At-25℃,discharge performance of the battery with low CNT content was poor,there was obviously voltage delay in discharge curves.As the mass fraction of carbon nanotube increased,the voltage hysteresis decreased and the discharge median voltage increased.The higher the carbon nanotube mass fraction is,the better the current discharge performance of the battery will be.

关 键 词：碳纳米管 水系匀浆 高低温放电性能 锂-二氧化锰电池 

分 类 号：TM911[电气工程—电力电子与电力传动]