LiCoO2/AC复合电极作为超级电容器的电极材料

为提高活性炭电极的容量,对活性炭进行掺杂LiCoO2处理,由此制备了复合电极。采用循环伏安、恒流充放电、循环寿命试验、漏电流性能测试等方法对掺杂LiCoO2的复合电极/活性炭混合电容器的性能进行了测试,结果表明掺杂LiCoO2后复合电极/活性炭混合电容器的性能大大提高,当复合电极中LiCoO2的质量分数为70%时,混合电容器的比容量达到最大值,在1.0mA/cm2时比容量达39.55F/g,比未掺杂的活性炭电容器提高50.7%,充放电效率有所提高,且混合电容器的电阻和漏电流较小(8.7mA),经1500次循环后电容量仍保持在83%以上,仍远高于活性炭电容器。

LiCoO2/activated carbon composite electrode for supercapacitors

In order to improve the capacitance,activated carbon was modified by LiCoO2,then prepared composite electordes.The improvements of activated carbon modified by LiCoO2 were confirmed by the experiments of CV,constant current charge/discharge,cycle life and leakage current tests.The result show that the performance of composite electrode/activated carbon electrode hybrid capacitor is much improved,its specific capacitance(39.55 F/g)would be highest at 1.0 mA/cm2 when the content of LiCoO2 is 70% in the composite,which is 50.7% higher than that of prime activated carbon capacitor.The charge/discharge efficiency is increased with lower resisitance and lower leakage current(8.7 mA).The capacitance of the capacitor kept more than 83% after 1 500 cycles and still higher than that of activated carbon capacitors.