Abstract
Abstract We have synthesized LiMn 1.5 Ni 0.4 Cr 0.1 O 4 cathode material for high energy density Li ion rechargeable batteries using sol–gel method. The synthesized materials were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, cyclic voltammetry and charge–discharge characteristics. It was found that phase pure materials were obtained an annealing temperature of 875 °C for 15 h. The maximum discharge capacity at a constant charge–discharge current rate 1 C , 0.5 C , and 0.2 C were found to be about 99 mAh g −1 , 110 mAh g −1 , and 131 mAh g −1 , respectively. The capacity retentions after 50 charge–discharge cycles were found to be about 99%, 97%, and 97.3% at discharge current rates of 0.2 C , 0.5 C , and 1 C . The stable electrochemical behavior of the above cathode material even at high C rate, showed that it could be used for high energy density and high rate capability Li ion rechargeable batteries.
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