%0 Journal Article
%K X-ray Diffraction
%K Lithium compounds
%K Secondary cells
%K Cathodes
%K Sol-gel processing
%A Jong-Tae Son
%A Elton J Cairns
%B Electrochemical and Solid-State Letters
%D 2006
%N 1
%P A27-A30
%R 10.1149/1.2136248
%T Preparation and Characterization of Li<sub>1.05</sub>[Ni<sub>0.35</sub>Co<sub>0.25</sub>Mn<sub>0.4</sub>]O<sub>2</sub> as a Cathode Material for Rechargeable Lithium Cells
%V 9
%8 01/2006
%! Electrochem. Solid-State Lett.
%X <p>A lithium insertion material Li<sub>1.05</sub>[Ni<sub>0.35</sub>Co<sub>0.25</sub>Mn<sub>0.4</sub>]O<sub>2</sub> was synthesized by a sol-gel method. The structural and electrochemical properties of the sample were investigated using X-ray diffraction spectroscopy (XRD) and the galvanostatic charge-discharge method. Rietveld analysis of the XRD patterns shows this compound as having the α-NaFeO<sub>2</sub> structure (<em>R3m; a</em> = 2.8670(4) Å, and 14.279(3) Å in hexagonal setting). Li<sub>1.05</sub>[Ni<sub>0.35</sub>Co<sub>0.25</sub>Mn<sub>0.4</sub>]O<sub>2</sub> has a discharge capacity of 164 mAh/g in the voltage range 2.8-4.5 V vs Li/Li<sup>+</sup>, a stable capacity on cycling, and good rate capability in the current range 0.1-4.0 C. When the voltage range is increased to 2.8-4.8 V, it yields a capacity of 187 mAh/g, but exhibits a significant loss of capacity during cycling. The results indicate that this novel cathode material should be useful for lithium-ion cells because it has a lower cost than LiCoO<sub>2</sub>-containing cells, and high performance.</p>