摘要
以偏钒酸铵为反应原料,采用液相沉淀法制备出不定型V2O5电极材料.以V2O5为正极,石墨为负极,分别选用1.0 mol/L LiClO4/EC+DMC、1.0 mol/L LiPF6/EC+DEC+DMC、1.6 mol/L Et4NBF4/AN 3种有机电解液组成不对称电化学电容器,恒流充放电、循环伏安和交流阻抗等测试该模拟电容器,如以1.0 mol/LLiClO4/EC+DMC作电解液则具有良好的循环性能和较小的阻抗,且在500 mA/g电流密度下比能量达到8.4Wh/kg,充放电效率达98%.
In this work, the V205 cathode and graphite anode were assembled into non-symmetric electrochemical capacitors using 1.0 mol/L LiClO4/（EC ＋ DMC） , 1.0 mol/L LiPF6/（EC ＋ DEC ＋ DMC） , and 1.6 mol/L Et4NBF4/AN as electrolyte, respectively. Charging and discharging tests, Cyclic Voltammetry and AC impedance methods were used to investigate the performance of the non-symmetric electrochemical capacitors. The. results showed that the electrolyte 1.0 mol/L LiClO4/（ EC ＋ DMC）displayed better cycling performance and less resistance. At the current density of 500 mA/g, its specific energy reached 8.4 Wh/kg and the charge-discharge efficiency was 98%.
出处
《电化学》
CAS
CSCD
北大核心
2008年第2期125-129,共5页
Journal of Electrochemistry
基金
广东省教育部产学研资助项目(项目编号:2007A090302006)资助
