Preparation method for lithium ion secondary battery anode material ferric lithium phosphate

A lithium iron phosphate and secondary battery technology, applied in the field of battery cathode material preparation, can solve problems such as poor high current discharge performance of batteries, and achieve the effects of excellent high current discharge performance, excellent electrical conductivity, and improved electrical conductivity
CN101494288AInactive Publication Date: 2009-07-29广西荷美新能源车辆科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
广西荷美新能源车辆科技有限公司
Publication Date
2009-07-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for preparing lithium iron phosphate which is a cathode material of lithium ion secondary battery, the method comprises the following procedures: A. a lithium source compound, a bivalence iron source compound, a phosphorus source compound and a small organic molecular carbon source additive are mixed, ball ground and sintered to obtain a sintering precursor; and B. the sintering precursor which is obtained from the procedure A and an organic high molecular polymer carbon source additive are mixed, ball ground, sintered and crushed to obtain the lithium iron phosphate power of finished products. In the method, the carbon source is added into the precursor in two steps: adding the organic small organic molecular carbon source first and then adding the organic high molecular polymer carbon source, thus obtaining a lithium iron phosphate carbon with good packing effect. The large current discharge performance of the battery made of the lithium iron phosphate is obviously raised.
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Description

technical field

[0001] The invention relates to a preparation method of a positive electrode material of a battery, more specifically, to a preparation method of lithium iron phosphate, a positive electrode material of a lithium ion secondary battery. Background technique

[0002] As a high-energy chemical power source, lithium-ion batteries have been widely used in mobile communications, notebook computers, video cameras, cameras, portable instruments and other fields. . Lithium iron phosphate (LiFePO 4 ) is a research hotspot of positive electrode active materials for lithium-ion batteries. LiFePO 4 As a positive electrode active material for lithium-ion batteries, compared with other batteries, it has good electrochemical performance, the charging and discharging platform is very stable, and the structure is stable during charging and discharging. The advantages of use and wide range of raw material sources are currently hot spots in the battery industry's development...

Claims

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