Publication

Abstract : Abstract Spinel structured nanomaterials have shown good stability for lithium ion storage applications. Among all, Li4Ti5O12 (LTO) anode and LiMn2O4 (LMO) cathode is a potential combination for high energy and high power applications. In the present work, we utilize this specific combination to fabricate full-cells in combination with carbon nanostructures as additives. Typically, 20–25 nm sized LTO and 200–500 nm sized LMO nanoparticle electrodes are composited with carbon nanostructures including, carbon nanotube (CNT), carbon black (CB) and graphene nanoplatelets (GNP). High rate performance of respective half-cells (lithium metal as counter electrode) of LTO and LMO are tested up to 50C. It was found that half-cells with CNT additive retained almost 80% of its 1C rate capacity at 50C rate. Also both the electrodes exhibited 1000 cycles stability with retention of about 80% at 10C rate cycling. Using these CNT additive based electrodes, a full-cell fabricated and tested exhibited high capacity and stable cycling over 500 cycles at 1000 mA/g specific current. The full-cell delivered power density of about 2310 W/kg and energy density of about 140 Wh/kg that can be further improved for high power Li-ion battery technology.