磷钨酸电极材料的超级电容器性能研究  

The Research on the Supercapacitor Performance of Phosphotungstic Acid Electrode Material

作　　者：屈妍 郭思雨 陈婷婷[1] Qu Yan;Guo Siyu;Chen Tingting(Harbin Normal University)

机构地区：[1]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2021年第1期14-18,共5页Natural Science Journal of Harbin Normal University

摘　　要：多金属氧酸盐由于具有快速可逆的多电子氧化还原反应特点,已成为备受瞩目的新一代超级电容器电极材料.但多金属氧酸盐易溶于水以及众多溶剂的缺点导致其循环稳定性能差、电容值偏低,制约了该电极材料的实际应用.将典型的多金属氧酸盐——磷钨酸盐通过四丁基溴化铵进行处理后,得到不溶于水的磷钨酸盐四丁基溴化铵电荷转移配合物.在三电极系统中测试其超级电容器性能,在5 A·g^(-1)电流密度下的电容值是64.1 F·g^(-1),在电流密度为15 A·g^(-1)时循环充电/放电15000次以后的电容保持率高达97%.磷钨酸盐四丁基溴化铵电荷转移配合物的循环稳定性能优于多数赝电容器电极材料,为磷钨酸盐在超级电容器电极材料方面的应用提供了一定的基础.Polyoxometalates have become a new generation of supercapacitor electrode materials that have attracted much attention due to their rapid and reversible multi-electron redox reactions.However,the shortcomings of polyoxometalates that are easily soluble in water and many solvents lead to poor cycle stability and low capacitance,which restricts the practical application of the electrode material.In this paper,the typical polyoxometalate,namely phosphotungstate,is treated with tetrabutylammonium bromide to obtain the water-insoluble tetrabutylammonium bromide charge transfer complex of phosphotungstate.The supercapacitor performance was tested in a three-electrode system,and the capacitance value at a current density of 5 A·g^(-1)was 64.1 F·g^(-1).At a current density of 15 A·g^(-1),the capacitance retention rate after 15000 cycles of charging/discharging is as high as 97%.The cycle stability of phosphotungstate tetrabutylammonium bromide charge transfer complex is better than most pseudocapacitor electrode materials,which provides a certain foundation for the application of phosphotungstate in supercapacitor electrode materials.

关 键 词：磷钨酸盐 超级电容器 电极材料 

分 类 号：O140.50[理学—数学]