Research on Lithium Ion Battery Material LiCoO₂ for Hybrid Supercapacitor

Abstract:

The electrochemical performance of capacitor was studied with LiCoO₂/AC as composite cathode and activated carbon (AC) as anode, in 1.0 mol/L LiPF₆/EC+DMC electrolyte. Cyclic Voltammetary, Constant-Current Charge and Discharge, Electrochemical Impedance Spectrum (EIS) and Leakage Current Test were tested to study the characteristics of supercapacitors. The results illustrate that recharging voltage of hybrid supercapacitor can reach to 3.0 V and show good capacitance characteristics. The supercapacitor can rapidly charge and discharge and show good cycling performance. There is a great effect to the performance of the capacitors by adopting different proportional composite electrode. When the ratio of composite electrode is 6:4, we get maximum symmetrical Cyclic Voltammetary and short charge-discharge time only 26.4min; When the ratio is 7:3, the minimum AC impedance of 26.2W can be attained and least leakage current is only 19.92mA/g; When the ratio is 5:5, the best first specific capacity can reach to 70.17F/g but a lower capacity retention rate is 74.86%.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1565-1568
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1565
• Online since: July 2011
• Authors: Sheng Li Zhang, Li Hua Ma, Xiao Gang Li, Yan Hua Song, Wei Li
• Keywords: Composite Electrode, Hybrid Supercapacitor, Lithium Cobaltite, Lithium-Ion Battery

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