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Basic introduction

Lithium cobalt oxide battery has stable structure, high capacity ratio and outstanding comprehensive performance, but its safety is poor and its cost is very high. It is mainly used in small and medium-sized batteries, and widely used in notebook computers, mobile phones, MP3 / 4 and other small electronic equipment, with a nominal voltage of 3.7V. Because of its simple and stable electrochemical performance, it is the first to realize lithium acid production. The first generation of lithium cobalt oxide has low compaction density, with about 0.55 lithium ions at most, which can be reversible de embedded. Excessive lithium ions will cause structural phase transition, lattice oxygen loss and electrolyte oxidation decomposition, etc., resulting in short service life and being eliminated by the society By increasing the sintering temperature and times of lithium cobalt oxide, single crystal primary grains of more than ten microns were synthesized by high-density synthesis process around 2000. The compacted density of lithium cobalt oxide electrode was increased to more than 4.0 g / cm3. The second generation of lithium cobalt oxide was born, which made its application in small battery market more attention. In order to adapt to the development of the times, lithium cobalt oxide should be gradually updated, most of the lithium-ion battery cathode material energy density needs to be improved, and lithium cobalt oxide in energy density has a lot of room to improve, in order to improve this performance, we need to modify lithium cobalt oxide, which mainly focuses on these two aspects: one is to make lithium cobalt oxide powder particles bigger and realize single crystal In order to improve the compaction density of the material, so as to improve the energy density; the other is to dope and coat the surface inert material to improve the discharge voltage and cycle performance of the material to improve the energy density. Lithium cobalt oxide adapts to the changes of the times, improves energy and density, keeps pace with the times, and adheres to the C position in the application of 3C products.

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Testing and certification of lithium cobalt oxide battery

Lithium cobalt oxide battery has stable structure, high capacity ratio and outstanding comprehensive performance, but its safety is poor and its cost is very high. It is mainly used in small and medium-sized batteries, and widely used in notebook computers, mobile phones, MP3 / 4 and other small electronic equipment, with a nominal voltage of 3.7V. Because of its simple and stable electrochemical performance, it is the first to realize lithium acid production. The first generation of lithium cobalt oxide has low compaction density, with about 0.55 lithium ions at most, which can be reversible de embedded. Excessive lithium ions will cause structural phase transition, lattice oxygen loss and electrolyte oxidation decomposition, etc., resulting in short service life and being eliminated by the society By increasing the sintering temperature and times of lithium cobalt oxide, single crystal primary grains of more than ten microns were synthesized by high-density synthesis process before and after the year. The compacted density of lithium cobalt oxide electrode was increased to more than 4.0 g / cm3. The second generation of lithium cobalt oxide was born, which made its application in small cell market more attention.

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