COMPOSITE LITHIUM SECONDARY BATTERY
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United States of America Patent
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Dec 1, 2015
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Dec 1, 2015
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Abstract
A composite lithium secondary battery, and the electrode layer assembly of the secondary battery includes: a plurality of positive electrode layers, a plurality of negative electrode layers and a plurality of separating layers disposed between the positive and negative electrode layers. The two opposite surfaces of the respective positive electrode layers are coated with the same positive electrode material which is LiFePO4 or lithium-containing ternary oxide, at least one of the positive electrode layers is coated with LiFePO4, and at least another one of the positive electrode layers is coated with lithium-containing ternary oxide, so that during the process of charge and discharge, the lithium secondary battery would have the advantages of different positive electrode materials.
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