Method for improving low-temperature performance of lithium iron phosphate anodic material for lithium batteries and lithium batteries

A positive electrode material, lithium iron phosphate technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of low electronic conductivity, poor safety of lithium cobalt oxide, short cycle life, etc., and achieve low-temperature discharge capacity Increased retention rate, improved low-temperature performance, and excellent low-temperature performance

Inactive Publication Date: 2011-01-26
FULLYMAX BATTERY CO LTD
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Problems solved by technology

[0004] In comparison, lithium cobalt oxide has poor safety, high cost, and short cycle life. Although the safety of lithium manganese oxide is better than that of lithium cobalt oxide, the cycle life is worse in high temperature environments. Lithium iron phosphate has high discharge power and low cost. , fast charging and long cycle life, high stability in high temperature and high heat environment, and good safety performance, so it is selec

Method used

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  • Method for improving low-temperature performance of lithium iron phosphate anodic material for lithium batteries and lithium batteries
  • Method for improving low-temperature performance of lithium iron phosphate anodic material for lithium batteries and lithium batteries
  • Method for improving low-temperature performance of lithium iron phosphate anodic material for lithium batteries and lithium batteries

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Embodiment 1

[0027] The lithium battery of this embodiment is to add 3% lithium cobalt oxide (this percentage is the percentage of lithium cobalt oxide to the total mass of the active material of the lithium iron phosphate positive electrode material) to the lithium iron phosphate positive electrode material formula of the comparative example. The specific formula is : 87.3% lithium iron phosphate, 2.7% lithium cobaltate, 5% binding agent and 5% conductive agent, all the other are the same as comparative examples.

Embodiment 2

[0029] The lithium battery of this embodiment is to add 5% lithium cobalt oxide (this percentage is the percentage of lithium cobalt oxide to the total mass of the active material of the lithium iron phosphate positive electrode material) to the lithium iron phosphate positive electrode material formula of the comparative example. The specific formula is : 85.5% lithium iron phosphate, 4.5% lithium cobaltate, 5% binding agent and 5% conductive agent, all the other are the same as comparative examples.

Embodiment 3

[0031] The lithium battery of this embodiment is to add 10% lithium cobalt oxide (this percentage is the percentage of lithium cobalt oxide to the total mass of the active material of the lithium iron phosphate positive electrode material) to the lithium iron phosphate positive electrode material formula of the comparative example. The specific formula is : 81% lithium iron phosphate, 9% lithium cobaltate, 5% binding agent and 5% conductive agent, all the other are the same as comparative examples.

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Abstract

The invention discloses method for improving the low-temperature performance of a lithium iron phosphate anodic material for lithium batteries and lithium batteries. The method is to add lithium cobaltate into the formula of the lithium iron phosphate anodic material for lithium batteries. In the invention, based on the characteristic that the low-temperature discharging performance of the lithium cobaltate is high, the problem of low-temperature performance of the conventional lithium iron phosphate batteries is solved, the conventional production process is not changed, and the lithium iron phosphate batteries with high low-temperature performance are manufactured. In the invention, by optimizing and screening the added amount of lithium cobaltate, the low-temperature discharging volume retention rate is increased, the discharging time is prolonged, and better effect is obtained.

Description

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Claims

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Application Information

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Owner FULLYMAX BATTERY CO LTD
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