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A Lithium Cobalt Oxide Secondary Battery Comprising A Fluorinated Electrolyte And A Positive Electrode Material For High Voltage Applications
Abstract: A liquid electrolyte lithium secondary battery cell comprising: a positive electrode including a powderous positive active material having the following chemical formula: Li1-x(Co1-a-b-cNiaMnbM"c)1+xO2 with -0.01=x=0.01, 0.00=a=0.09, 0.01=b=0.05, and 0.00=c=0.03, wherein M" is either one or more metals of the group consisting of Al, Mg, Ti and Zr; and an electrolyte composition comprising at least one cyclic carbonate; at least one fluorinated acyclic carboxylic acid ester; at least one electrolyte salt; at least one lithium compound selected from lithium phosphates compounds, lithium boron compounds, lithium sulfonates compounds and mixtures thereof; at least one cyclic sulfur compound; and optionally at least one cyclic carboxylic acid anhydride.
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