@article{27819, keywords = {X-ray Diffraction, Lithium compounds, Secondary cells, Cathodes, Sol-gel processing}, author = {Jong-Tae Son and Elton J Cairns}, title = {Preparation and Characterization of Li1.05[Ni0.35Co0.25Mn0.4]O2 as a Cathode Material for Rechargeable Lithium Cells}, abstract = {
A lithium insertion material Li1.05[Ni0.35Co0.25Mn0.4]O2 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-NaFeO2 structure (R3m; a = 2.8670(4) Å, and 14.279(3) Å in hexagonal setting). Li1.05[Ni0.35Co0.25Mn0.4]O2 has a discharge capacity of 164 mAh/g in the voltage range 2.8-4.5 V vs Li/Li+, 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 LiCoO2-containing cells, and high performance.
}, year = {2006}, journal = {Electrochemical and Solid-State Letters}, volume = {9}, pages = {A27-A30}, month = {01/2006}, issn = {10990062}, doi = {10.1149/1.2136248}, }