Template-synthesized LiCoO2, LiMnO4, and LiNi0.8Co0.2O2 nanotubes as the cathode materials of lithium ion batteries

Article Abstract:

The synthesis of LiCoO2, LiNi0.8co0.2O2, and LiMn2O4 nanotubes and their studies in electrochemical lithium insertion/deinsertion is reported. The results show that the electrodes made with these nanotubes exhibit high capacity, excellent high rate discharge performance, and performance, and supreme cycling reversibility, and indicating that nanotubes of lithiated oxides are promising cathode active materials for advanced rechargeable lithium ion batteries.

Primary Battery Manufacturing, Primary batteries, dry and wet, Lithium Dry Cell Batteries, Lithium cells, Lithium batteries, Chemical synthesis, Nanotubes

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Local electronic structure of layered Li(sub x)Ni0.5Mn0.5O2 and Li(sub x)Ni1/3Co1/3O2

Article Abstract:

Li(sub x)Ni0.5Mn0.5O2 and Li(sub x)Ni1/3MN1/3Co1/3O2 samples were prepared as active materials in electrochemical half-cells and were cycled to obtain different values of Li concentration, x. Absorption edges of Ni, Mn, Co and O in the materials of differing x were measured by electron energy loss spectrometry (EELS) in a transmission electron microscope to determine the changes in local electdronic structure caused by delithiation.

Cobalt Compounds, Usage, Transmission electron microscopes

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An electron energy-loss spectrometry study of charge compensation in LiNi0.8Co0.2O2

Article Abstract:

Changes in the electronic structure of Li(sub 1-x)Ni0.8Co0.2O2 during delithiation are elucidated by changes in the O K-edge and transition-metal (TM) L2,3-edge. The quantitative analysis of the TM L2,3 white lines indicate that the NI atom accommodates no more than one-half of an electron, whereas the net Co valence is unaffected by delithiation.

Energy dissipation, Atomic properties

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