Synthesis and characterization of integrated layered nanocomposites for lithium ion batteries

The series of Li[Ni(x)M(x)Li(1/3-x)Mn(2/3-x)]O(2 )cathodes, where M is cobalt or chromium with a wide compositional range x from 0 to 0.33, were prepared by hydroxide coprecipitation method with subsequent quenching. The sample structures were investigated using X-ray diffraction results which were indexed completely on the basis of a trigonal structure of space group [Formula: see text] with monoclinic C2/m phase as expected. The morphologies and electrochemical properties of the samples obtained were compared as the value of x and substituted transition metal. The particle sizes of cobalt-substituted Li[Ni(x)Co(x)Li(1/3-x)Mn(2/3-x)]O(2 )samples are much smaller than those of the Li[Ni(x)Cr(x)Li(1/3-x)Mn(2/3-x)]O(2 )system. The electrode containing Li[Ni(x)Co(x)Li(1/3-x)Mn(2/3-x)]O(2 )with x = 0.10 delivered a discharge capacity of above 200 mAh/g after 10 cycles due to the activation of Li(2)MnO(3). PACS: 82.47.Aa; 82.47.-a; 82.45.Fk.