电子元件与材料2017，Vol.36Issue(4)：64-70,7.DOI:10.14106/j.cnki.1001-2028.2017.04.013
超级电容器混合型电解液(EMIES+LiClO4)的热力学和电化学性质
Thermodynamics and electrochemistry properties of supercapacitor mixed electrolyte (ethylsulfate ionic liquids + lithium perchlorate)
摘要
Abstract
A series of new ionic liquid-based electrolytes were prepared by mixing ionic liquid 1-ethyl-3-methylimidazole ethylsulfate (EMIES) and lithium perchlorate salt (LiC1O4) with different molar ratios.The thermodynamic properties of the mixed electrolyte systems (EMIES+LiC1O4) were determined like conductivity,density,and viscosity.The viscosity and conductivity of the system show an opposite trend with the temperature change.There is a nonlinear change of the conductivity with the addition of LiC1O4 for the system,and when the molar ratio ofperchlorate is 0.05,the electrolyte has a optimal conductivity and viscosity performances.Further,the activated carbon electrode was used to assemble the supercapacitor with the mixed electrolyte.The performances of the assembled supercapacitor were tested and studied by AC impedance,constant current charge-discharge,and cyclic voltammetry methods.The results are as follows:the electrochemical window of the mixed electrolyte reaches 5.1 V;the single electrode capacitance ratio is 458.65 F · cim1-3;specific capacitance after 1000 times charge-discharge test decreases only 1.9％.Those indicate that the new mixed ionic liquid-based electrolyte can provide excellent capacitance,good reversibility and cycling characteristics.The mixed electrolyte system has great potential in high performance supercapacitor applications.关键词
离子液体/混合电解质/物化性质/超级电容器/循环伏安/EMIES/高氧酸锂盐Key words
ionic liquid/mixed electrolyte/physical and chemical properties/supercapacitor/cyclic voltammetry/EMIES/LiC1O4分类
信息技术与安全科学引用本文复制引用
张庆国,兰亚林,张鑫源,王兵,张学磊..超级电容器混合型电解液(EMIES+LiClO4)的热力学和电化学性质[J].电子元件与材料,2017,36(4):64-70,7.基金项目
国家自然基金项目(No.21003081,21373002,21503020) （No.21003081,21373002,21503020）
辽宁省自然科学基金(No.201602016) （No.201602016）
