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Formation method of lithium titanate battery

A technology of lithium titanate battery and its formation method, which is used in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, climate sustainability, etc., can solve the problems of uneven dispersion, reduced energy density, unfavorable practical application, etc., to ensure battery capacity. , the effect of improving cycle performance

Active Publication Date: 2018-03-06
HEBEI YINLONG NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most researchers add some additives or getter materials to the electrolyte solution to improve the flatulence problem of lithium titanate. Although it has a certain effect, it has high requirements on the purity of the additives, and it may bring Problems such as reduced energy density and uneven dispersion are not conducive to practical application in industrialization

Method used

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  • Formation method of lithium titanate battery
  • Formation method of lithium titanate battery
  • Formation method of lithium titanate battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0052] Place the battery in the formation cabinet for formation, adjust the temperature to 60°C, let it stand at a constant temperature for 5 minutes, then charge it with a constant current of 0.2C to 2.6V, then charge it with a constant voltage for 4 hours, let it stand for 10 minutes, and charge it with a constant current of 0.2C to 2.6V. Current discharge to 1.4V, then discharge at constant voltage for 4h, stand still for 10min, then age at high temperature 30℃ for 20h, decompress and exhaust, cycle 2 times; keep at constant temperature for 5min, then charge to 2.9V with a constant current of 1C, and then Charge at constant voltage for 2 hours, let it stand for 5 minutes, discharge at constant current of 1C to 1.7V, discharge at constant voltage for 2 hours, age at 30°C for 10 hours, depressurize and exhaust, cycle 3 time...

Embodiment 2

[0054] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0055] Place the battery in the formation cabinet for formation, adjust the temperature to 80°C, let it stand at a constant temperature for 1 hour, then charge it with a constant current of 1C to 2.9V, then charge it with a constant voltage for 2 hours, let it stand for 10 minutes, and discharge it with a constant current of 1C To 1.7V, then constant voltage discharge for 2h, high temperature 40°C aging for 10h, decompression and exhaust, cycle 4 times, seal, activation is complete.

Embodiment 3

[0057] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0058] Place the battery in the formation cabinet for formation, adjust the temperature to 120°C, keep it at a constant temperature for 2 hours, then charge it at a constant current of 1C to 2.9V, then charge it at a constant voltage for 2 hours, let it stand for 1 hour, and discharge it at a constant current of 2C To 1.7V, then constant voltage discharge for 4h, high temperature 60°C aging for 4h, decompression and exhaust, cycle 3 times, seal, activation is complete.

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Abstract

The invention discloses a method for forming a lithium titanate battery, comprising the following steps: S1. At a first preset temperature T1, after the battery is placed on hold for a first preset time t1, the battery is kept at a first preset current I1 S2, at the first preset temperature T1, after the battery is put on hold for a third preset time t3, the battery is charged with the second preset time t3. Set the current I2 to constant current discharge to the second cut-off voltage U2, and discharge the constant voltage U2 for the fourth preset time t4; S3, at the second preset temperature T2, age the battery for the sixth preset time t6, reduce the pressure and pump and S4, repeating the steps S1-S3 for a preset number of times, and then sealing the liquid injection port of the battery. The chemical formation method of the lithium titanate battery of the present invention enables the water in the battery to be fully consumed, and the generated gas is discharged from the outside of the battery, which can ensure the battery capacity and improve the cycle performance of the lithium titanate battery.

Description

technical field [0001] The invention relates to the field of manufacturing lithium ion batteries, in particular to a method for forming a lithium titanate battery. Background technique [0002] At present, the anode materials of lithium-ion batteries are mostly lithium-intercalated carbon materials, but the potential of the carbon electrode after lithium intercalation is close to that of metal lithium. When the battery is charged, the surface of the carbon electrode is easy to precipitate metal lithium, which reacts with the electrolyte to produce flammable gas. Therefore, the use of safe and reliable new negative electrode materials has become the key to the development of lithium-ion batteries. Lithium-ion batteries prepared with lithium titanate as the negative electrode material have attracted extensive attention from researchers due to their long cycle life, good rate performance, good fast charging performance and good safety, and have become a hot spot at present. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 刘金良高峰张汝彬石琳琳张要枫陈蓓
Owner HEBEI YINLONG NEW ENERGY
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