Method for preparing cathode material lithium vanadium phosphate of lithium ion battery by using fast sol-gel method

A technology of lithium ion battery and sol-gel method, which is applied in the field of lithium vanadium phosphate preparation lithium ion battery positive electrode material, can solve the problems of high equipment requirements, lower product roasting temperature, large material particles, etc., and achieve simplified synthesis process, roasting The effect of shortening the time and uniform material particles
CN101841024AInactive Publication Date: 2010-09-22NANCHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANCHANG UNIV
Publication Date
2010-09-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a cathode material lithium vanadium phosphate of a lithium ion battery by using a fast sol-gel method, which specifically comprises the following steps of: (1) adding vanadic oxide into the solution of a reducing acid, heating the mixed solution to 60 to 80 DEG C and stirring the mixed solution for 10 to 50 minutes at a constant temperature to obtain blue solution; (2) adding lithium salts into the blue solution, wherein a stoichiometric ratio of the lithium salts to the vanadic oxide is 3-3.2: 2.9-3.05: 0.95-1.05; (3) treating an obtained powder material in an inert atmosphere at 200 to 400 DEG C for 2 to 4 hours to obtain a precursor; and (4) mixing and grinding uniformly the obtained precursor and another carbon source and cooling the mixture to obtain the cathode material lithium vanadium phosphate of the lithium ion battery. The method has the advantages that: (1) a synthesis process is simplified, the cost is reduced and the method is applied to industrial production; (2) the baking time is greatly shortened, the granularity of the product is reduced and the synthesized material has a nano-size; and (3) the carbon source is mixed before baking, carbon granules also can prohibit the growth of material granules and the synthesized material granules are uniform and fine.
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Description

technical field

[0001] The invention relates to a method for preparing lithium vanadium phosphate, a positive electrode material of a lithium ion battery, in particular to a method for preparing lithium vanadium phosphate, a positive electrode material for a lithium ion battery, by a rapid sol-gel method. Background technique

[0002] As a technology that can safely and effectively realize the conversion and storage of chemical energy and electrical energy, chemical power technology has set off a research boom in the world. Lithium-ion batteries are regarded as one of the most potential chemical power sources because of their small size, light weight, high working voltage, high specific energy, long cycle life, no memory effect, and small self-discharge. At present, lithium-ion batteries have played their unique advantages in some markets in the fields of electric vehicles (EV), hybrid electric vehicles (HEV), electric bicycles (EB), and power tools (PT). As the most critic...

Claims

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