MICROSTRUCTURAL AND SUPERCAPACITIVE PERFORMANCE OF CUBIC SPINEL Li4Ti5O12 NANOCOMPOSITE

Abstract

Nanocrystalline Li4Ti5O12 was synthesized using solid state reaction method. The influence of sintering temperature on chemical composition and microstructure was studied. The Li4Ti5O12 powder sintered at 900 C exhibited predominant (111) orientation representing cubic spinel structure with particle size of 46 nm. The composition and phase were confirmed from TG and EDX measurements. The displayed bright spots with clear diffracted rings in SAED pattern corresponding to characteristic orientations confirm the cubic spinel LTO phase. The pure LTO electrode exhibited a discharge specific capacitance of 265 F/g at current density of 0.5 A/g with good cycling stability (81%) after 5000 cycles. The significance electrochemical properties are attributed to the phase purity of LTO with low particle size which provides improved conduction paths.

Keywords

• nanocrystalline li4ti5o12
• solid state reaction
• cv
• gcd
• supercapacitor