Effects of Washing and Heat-treatment on Structure and Electrochemical Charge/Discharge Property for LiNi$lt;inf$gt;0.8$lt;/inf$gt;Co$lt;inf$gt;0.15$lt;/inf$gt;Al$lt;inf$gt;0.05$lt;/inf$gt;O$lt;inf$gt;2$lt;/inf$gt; Powder

The effect of washing on electrochemical properties of Ni-rich layered cathode LiNi 0.8 Co 0.15 Al 0.05 O 2 powder is widely known, but few literatures have reported thoroughly. Primitive LiNi 0.8 Co 0.15 Al 0.05 O 2 powders processed by deionized water and heat-treatment at different temperatures in a paralleling time was explored for the first time. Significant changes of structure, morphology and electrochemical charge/discharge property of the LiNi 0.8 Co 0.15 Al 0.05 O 2 cathode were detected comprehensively. Mechanism of washing and heat-treatment on the structure and electrochemical charge/discharge property and the rate performance were studied. XRD patterns show the I (003) /I (104) value of LiNi 0.8 Co 0.15 Al 0.05 O 2 powders decreases and the volume turns smaller after being washed and heat-treated. FT-IR spectra confirm the existence of lithium carbonate, and nickel compounds and their relative changes in the LiNi 0.8 Co 0.15 Al 0.05 O 2 powders. The specific capacity and rate performance of the LiNi 0.8 Co 0.15 Al 0.05 O 2 powders were carried out before and after washing and heat-treatment. The capacities of primitive sample and treated samples remain 88.87%, 87.21%, 85.43% and 87.80% after 30 cycles, respectively.