【摘要】 为提高全钒液流电池的能量密度和正极电解液稳定性,采用循环伏安、交流阻抗等方法,研究了1-丁基-3-甲基咪唑四氟硼酸盐(BMIMBF4)作为正极电解液添加剂对溶液稳定性和电化学反应活性的影响,并对其机理进行了初步探讨。实验结果表明,添加BMIMBF4后,正极电解液中五价钒离子的稳定性显著提高,电解液的电化学反应活性也有所提升。当添加量为1%时,电池的单位体积电容量比有所增加,并且能量效率有所提升。更多还原

【Abstract】 1-Butyl-3-methylimidazolium tetrafluoroborate(BMIMBF4)was used as the additive in anode electrolyte for vanadium redox flow battery(VRB).Its electrochemical performance and stability were investigated by cyclic voltammetry(CV),electrochemical impedance spectrum(EIS),charge-discharge measurement and examination of stabilization.The results indicated that the electrochemical activity and stability of the anode electrolyte were improved by adding BMIMBF4.The electric capacity of unit volume and the energy efficiency were also increased.更多还原