A high-safety long-life ternary material battery

A material battery and ternary material technology, applied in the direction of batteries, battery electrodes, secondary batteries, etc., can solve the problems of poor cycle life and low safety, achieve high tap density, high capacity retention rate, and improve cycle life Effect

Active Publication Date: 2020-03-27
湖南锂顺能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, solve the problems of low safety and poor cycle life of the existing ternary material batteries, and provide a high-safety long-life ternary material battery

Method used

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  • A high-safety long-life ternary material battery
  • A high-safety long-life ternary material battery
  • A high-safety long-life ternary material battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Positive electrode slurry:

[0025] Ternary material LiNi 0.5 Co 0.2 Mn 0.3 O 2 : Polyvinylidene fluoride: oily carbon nanofiber = 94.0%: 4.5%: 1.5%. Add polyvinylidene fluoride according to the metering ratio, prepare polyvinylidene fluoride and the positive electrode slurry solvent N-methylpyrrolidone according to the metering ratio, add N-methylpyrrolidone and then polyvinylidene fluoride to make the polyvinylidene fluoride concentration 4.0 wt%; Revolving 35rpm, rotation 200rpm, stirring for 10min, then normal stirring, revolving 35rpm, rotation 2200rpm, vacuum stirring for 4h; adding oily carbon nanofiber according to the metering ratio, revolving 55rpm, rotation 600rpm, stirring for 20min, revolving 65rpm, rotation 2600rpm, vacuum stirring for 2h; add ternary material LiNi according to the metering ratio 0.5 Co 0.2 Mn 0.3 O 2 , Revolve at 45 rpm, rotate at 2300 rpm, stir for 15 min, then perform normal stirring, revolve at 65 rpm, rotate at 2700 rpm, and stir for 150...

Embodiment 2

[0034] Positive electrode slurry:

[0035] Ternary material LiNi 0.4 Co 0.2 Mn 0.4 O2: polyvinylidene fluoride: oily carbon nanofiber = 95.0%: 3.3%: 1.7%. Prepare polyvinylidene fluoride and positive electrode slurry solvent N-methylpyrrolidone according to the metering ratio, add N-methylpyrrolidone and then polyvinylidene fluoride to make the concentration of polyvinylidene fluoride 4.0wt%; rotation 35rpm, rotation 200rpm stirring After scraping for 10 minutes, carry out normal stirring, revolution 35rpm, 2200rpm vacuum stirring for 4h; add oily carbon nanofibers according to the metering ratio, stir for 20min with 55rpm revolution and 600rpm, after scraping, revolution 65rpm, 2600rpm, vacuum stirring for 2h; Join ternary material LiNi 0.5 Co 0.2 Mn 0.3 O 2 , Revolve at 45 rpm, rotate at 2300 rpm, stir for 15 min, then perform normal stirring, revolve at 65 rpm, rotate at 2700 rpm, and stir for 150 min. After the slurry is stirred, the viscosity is adjusted and adjusted accord...

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Abstract

The invention relates to a high-security long-life ternary material battery. Cathode size comprises the following solid matters by mass percent: 92.0-95.5% of ternary material, 3.0-7.0% of polyvinylidene fluoride and 1.5-2.5% of oily carbon nanofibers, and anode size comprises the following solid matters by mass percent: 90.0-93.5% of lithium titanate, 1.0-2.4% of sodium carboxymethylcellulose, 3.5-7.0% of a binding agent, 0.3-1.0% of SP type conductive carbon black, 0.5-1.8% of C45 type conductive carbon black and 1.2-2.4% of KS-6 type conductive carbon black. The high-security long-life ternary material battery provided by the invention is qualified in security, under room temperature condition, continuous charging and discharging is carried out according to 1C charge-discharge system, capacity retention ratio after 2000 cycles is higher than 80%, and operating requirements of a small electric tool, aviation, spaceflight and new energy automobiles can be met.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a high-safety long-life ternary material battery. Background technique [0002] High-efficiency secondary batteries are designed and developed for "providing energy for mobile users" and "storing electricity". For mobile users to store energy, batteries are required to have long life, high safety, and differentiated performance. Compared with other types of secondary batteries, lithium-ion batteries have outstanding advantages such as higher specific energy, higher specific power, higher voltage, small self-discharge, no memory effect, and green environmental protection. They have become the most ideal battery system. [0003] Under the national energy strategy, the new energy industry has developed rapidly under the stimulation of favorable policies. At present, the mainstream systems of lithium-ion batteries are divided into lithium iron phosphate and ternary materials....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/485H01M10/0567H01M10/42H01M4/62
CPCH01M4/485H01M4/505H01M4/525H01M4/625H01M10/0567H01M10/4235H01M2220/20Y02E60/10
Inventor 何鹏飞沈智郑拥军陈建华
Owner 湖南锂顺能源科技有限公司
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