JOURNAL of the Tunisian Chemical Society

Layered LiCoO₂ was synthesized by sol-gel process, and a polypyrrole/ LiCoO₂ composite was then prepared by polymerizing pyrrole monomer in Pickering emulsion stabilized by LiCoO₂ particles. The bare sample and composite were subjected to analysis and characterization by the techniques of X-Ray Scattering (WAXS), infrared spectroscopy (IR) and scanning electron microscopy (SEM). The electrochemical properties of the composite were investigated with galvanostatic charge-discharge test and, which shows that the polypyrrole (PPy) significantly decrease the charge-transfer resistance LiCoO₂. The composite containing 25 wt% PPy exhibits a good electrochemical performance, its specific discharge capacity is 178 mAhg⁻¹ at C/20 rate and voltage limits of 3-4.5 V, while the capacity of the bare sample is only 136 mAhg⁻¹.

K. Ferchichi, S.E. Boughdiri, N. Amdouni, V. Pralong

PPy, Conducting Polymer, composite materials, lithium battery

Pages: 45-52