Advanced charge performance of pristine Li4Ti5O12 spinel for power lithium-ion battery

Abstract

Intense research works had been devoted worldwide to the improvement of electrons conductivity of Li4Ti5O12 spinel to get better power performances. In this study, our experimental results revealed that pristine Li4Ti5O12 spinel possessed excellent power charge performance. Three charge–discharge modes were employed to take advantage of its outstanding power charge capacity. The power capacity of Li4Ti5O12 spinel was increased about 13 times at high current density by using an appropriate working mode. Even at 30C, Li4Ti5O12 could keep 90% of the reversible capacity at 0.5C in the improved mode, whereas it was only 7% in the ordinary mode. The corresponding improvement mechanism of different working modes was demonstrated. Our results suggested that designing appropriate working modes for electrode materials according to their inherent characteristics would be a promising way to achieve advanced performance in the field of lithium-ion battery.