Synthesis and electrochemical characterization of spinel Li[Li(1−x)/3CrxTi(5−2x)/3]O4 anode materials

Spinel Li[Li(1−x)/3CrxTi(5−2x)/3]O4 compounds have been investigated as anode materials for lithium secondary batteries. Li[Li(1−x)/3CrxTi(5−2x)/3]O4 electrodes (0≤x≤1.0) exhibit a reversible capacity between 163 and 154 mAh g−1 with excellent cycleability. Increase in the amount of Cr ions substituted for Ti ions in the spinel structure decreases the reversible capacity due to a smaller theoretical capacity, but lowers the area specific impedance (ASI) and increases the rate capability.