(398r) Characterization of Lithium Cobaltate Nanoparticles Produced By Ccso

The crystalline LiCoO2 nanoparticles were produced by Carbon Combustion Synthesis of Oxide (CCSO). The thermo-gravimetric analysis was used to identify interaction features in the system LiNO3 - Co3O4 - Carbon to produce LiCoO2. The electrochemical testing of the lithium cobalt oxide-based nano-composite were prepared consisting of the active powder material (93.5 wt. %), carbon black (4 wt. % as the conductor) and polyvinylidenefluoride (PVDF, <1μm, Sigma Aldrich) dissolved in N-methyl pyrrolidinone as the binder (2,5 wt.%). After all components were mixed thoroughly, the cast was coated on an aluminum foil substrate; the coating was followed by pressing and drying at 120 °C for 12 h under a vacuum. Laboratory made pouch-type battery was assembled in glove box using separator membrane with special type of polyethylene: thickness 16~25 μm, Surface Density 10~14 g/m2, Porosity 36 - 44 %, Pore Size 0.03 μm, Charge-discharge cycles were carried out in the potential range of 2.7 - 4.2 V.  The analyser discharges the battery at constant current down to 2.7 V, then after 1 minute at constant current the battery was charged up to 4.2 V. The cathode materials prepared from as synthesized materials shows good performance for lithium-ion batteries. The CCSO is giving submicron and nano-sized particles which are showing excellent consistency of specific capacity and retaining over 90 % of initial capacity after 30 cycles. The as-prepared LiCoO2 has over 200 mAh/g capacity which is more than 66% of theoretical maximum value for LiCoO2. The CCSO is a promising method to produce ultrafine LiCoO2 cathode materials with improved electrochemical performance.