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- W2019954164 abstract "Lanthanum-doped LiCoO2 composite cathode materials, containing 0.1–10 mol% of La were synthesized by citric acid aided combustion technique. Thermal analyses showed that the sharp decomposition reaction for pristine LiCoO2 became sluggish upon addition of lanthanum. X-ray diffraction analyses of the composites revealed existence of minute quantities of lanthanum-rich perovskite phases—rhombohedral LaCoO3 (R3¯) and tetragonal La2Li0.5Co0.5O4 (14/mmm), along with rhombohedral LiCoO2 (R3¯m). Electron microscopy showed a distinct grain growth with increasing La content. An increase of about two orders of magnitude in the electrical conductivity (1.09 × 10−3 S cm−1) was observed for 1.0 mol% La-doped LiCoO2. An excellent cycling performance with capacity retention by a factor of ∼10 in comparison to the pristine LiCoO2 was observed for the composite cathode containing 5.0 mol% La, when 2032 type coin cells were cycled at 5C rate. This has been ascribed to the structural stability induced by La doping and presence of the ion-conducting phase La2Li0.5Co0.5O4 which acts as a solid electrolyte for Li+ ions. A negligible growth of impedance upon repeated cycling has been observed. Cyclic voltammetry showed a remarkable improvement in reversibility and stability of the La-doped electrodes. These composite cathodes might be very useful for high rate power applications." @default.
- W2019954164 created "2016-06-24" @default.
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- W2019954164 date "2009-02-01" @default.
- W2019954164 modified "2023-09-27" @default.
- W2019954164 title "Lanthanum-doped LiCoO2 cathode with high rate capability" @default.
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- W2019954164 doi "https://doi.org/10.1016/j.electacta.2008.09.050" @default.
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