大容量动力型超级电容器存储性能

Storage performance of large-capacitance power supercapacitor

超级电容器的电荷存储能力受多个因素的影响。以商品化的大容量动力型超级电容器为研究对象,从充电电流、充电电压、恒压时间、存储温度和电解液体系5个方面对超级电容器单体的电压保持能力进行系统研究。结果表明,较低的充电电流、充电电压和环境温度以及较长的恒压时间有利于电荷储存,单体电压保持能力较好。此外,当使用的电解质盐相同时(四氟硼酸四乙基铵,TEA-BF4),碳酸丙烯酯(PC)溶剂基电解液体系的电压保持能力较好;而当使用的溶剂相同时(PC基体系电解液时),相同浓度的TEA-BF4电解液电压保持能力比四氟硼酸螺环季铵盐(SBP-BF4)电解液好。

The charge storage capacity of supercapacitors is affected by many factors.A study of the voltage holding ability of commercial large-capacitance power supercapacitors is systematically studied from five aspects:charging current,charging voltage,constant voltage time,storage temperature,and the electrolyte system.The results indicate that lower charging current,lower charging voltage,lower ambient temperature,and longer constant voltage time are conducive to charge storage and improved monomer voltage retention capability.When the electrolyte salt is fixed,specifically tetraethylammonium tetrafluoroborate(TEA-BF4),the solvent with the best voltage retention ability was propylene carbonate(PC).With a fixed solvent(PC)and concentration of electrolyte,the TEA-BF4 salt showed better voltage retention than spiro-(1,1′)-bipyrrolidinium tetrafluoroborate(SBP-BF4).