Formation of MWCNT/LiCo₂O₄ nanoplates and their application for hybrid supercapacitor

In this work, LiCo₂O₄ nanoplates are prepared by simplest and most adoptable co-precipitation method. The prepared nanomaterial is figured out by several characteristic techniques. Thereafter, LiCo₂O₄ nanoplates are used for supercapacitor and specific capacitance of 951 F g⁻¹ is observed at 1 A g⁻¹. Further, capacitive performance of LiCo₂O₄ nanoplates is enhanced by adding up the appropriate amount of multi-walled carbon nanotubes (MWCNTs) and high specific capacitance of 1373 F g⁻¹ is observed at 1 A g⁻¹. Owing to the good specific capacitance of MWCNT/LiCo₂O₄, hybrid supercapacitor is designed where MWCNT/LiCo₂O₄ and activated carbon (AC) are utilized as positive (+ve) and negative (-ve) electrodes, correspondingly. Furthermore, the electrochemical performance of MWCNT/LiCo₂O₄//AC is investigated. The high energy density of 54.84 W h kg⁻¹ at 775 W kg⁻¹ is received from MWCNT/LiCo₂O₄//AC hybrid supercapacitor. Additionally, two red color light emitted diodes (LEDs), toy motor fan and kitchen timer are functionalized by two MWCNT/LiCo₂O₄//AC hybrid supercapacitors connected in series.