Method for preparing lithium manganese phosphate positive material of lithium battery by spray pyrolysis

A technology of lithium manganese phosphate and cathode material, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of inability to effectively control the particle size and phase composition of lithium manganese phosphate, and achieve good electrochemical performance, fine and uniform particles, and purity. high effect
CN103000893AActive Publication Date: 2013-03-27DONGFANG ELECTRIC CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGFANG ELECTRIC CORP LTD
Publication Date
2013-03-27

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Abstract

The invention relates to a method for preparing a lithium manganese phosphate positive material of a lithium battery by spray pyrolysis and belongs to the technical field of the positive materials of lithium batteries. According to the method, homogeneous nucleation of lithium manganese phosphate is promoted through the high-temperature spray pyrolysis under the condition of an inert atmosphere, so as to reduce the temperature and the time of the follow-up reaction to obtain the lithium manganese phosphate positive material with excellent electrochemical performance. The method disclosed by the invention is simple; and since raw materials are mixed in molecular ion level and the temperature and the time of the follow-up reaction are reduced after the high-temperature spray pyrolysis, the obtained lithium manganese phosphate material has the advantages of high purity, complete crystal structure, fine and uniform particles and the excellent electrochemical performance.
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Description

technical field

[0001] The invention relates to a preparation method of a positive electrode material of a lithium battery, more specifically, the invention relates to a preparation method of a lithium manganese phosphate lithium positive electrode material by spray pyrolysis, which belongs to the technical field of lithium battery positive electrode materials. Background technique

[0002] Lithium-ion battery, as a new type of green battery, has developed rapidly since it came out. At present, the development and application of positive electrode materials for lithium-ion batteries mainly include lithium cobaltate, lithium manganate, nickel-cobalt lithium manganate and lithium iron phosphate, and these positive electrode materials are more or less insufficient. It is becoming more and more important to develop cathode materials with high energy density, good safety and excellent cycle performance. Among them, olivine-type LiMnPO 4 The material has a theoretical specific c...

Claims

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