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Lithium ion power battery and preparation method therefor

A power battery, lithium ion technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems affecting electrode cycle stability, electrolyte co-insertion, battery attenuation, etc., achieving excellent rate charge and discharge, low processing temperature , the effect of increasing tolerance

Inactive Publication Date: 2018-02-16
BEIJING JUNXIU CONSULTATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And eventually cause performance degradation and battery attenuation
At the same time, graphite electrodes also have the problem of co-intercalation of the electrolyte, which will also affect the cycle stability of the electrode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The positive plate of the lithium-ion power battery is composed of 10% iron disulfide, 5% carbon nanotubes, 80% lithium cobaltate, 2% graphite, and 3% tin carbonate; the negative plate of the lithium-ion power battery is composed of 85% lithium titanate, 10% nano metal particles and 5% binder composition.

[0018] In this embodiment, a preparation method of a lithium-ion power battery comprises the following steps:

[0019] A. Production of positive electrode materials: Mix iron sulfide, carbon nanotubes, lithium cobaltate, graphite, and tin carbonate and add them to the mixing tank for low-speed stirring at a rate of 80 rpm for 5 minutes, and then coat the stirred mixture On the aluminum foil, baked at 100°C for 3 hours in a vacuum environment, cooled naturally, and then pressed into sheets to obtain the positive electrode sheet;

[0020] B. Preparation of negative electrode material: mix lithium titanate, nano-metal particles and binder, add them to a water bath and ...

Embodiment 2

[0023] The positive plate of the lithium-ion power battery is composed of 20% iron disulfide, 5% carbon nanotubes, 70% lithium cobaltate, 2% graphite, and 3% tin carbonate; the negative plate of the lithium-ion power battery is composed of 75% lithium titanate, 20% nano metal particles and 5% binder composition.

[0024] In this embodiment, a preparation method of a lithium-ion power battery comprises the following steps:

[0025] A. Production of positive electrode materials: Mix iron sulfide, carbon nanotubes, lithium cobaltate, graphite, and tin carbonate and add them to a mixing tank for low-speed stirring at a rate of 120 rpm for 10 minutes, and then coat the stirred mixture On aluminum foil, bake at 140°C for 5 hours in a vacuum environment, cool naturally, and then press into sheets to obtain the positive electrode sheet;

[0026] B. Preparation of negative electrode material: mix lithium titanate, nano-metal particles and binder, add them to a water bath and heat and ...

Embodiment 3

[0029] The positive plate of the lithium-ion power battery is composed of 12% iron disulfide, 6% carbon nanotubes, 75% lithium cobaltate, 3% graphite, and 4% tin carbonate; the negative plate of the lithium-ion power battery is composed of 82% lithium titanate, 12% nano metal particles and 6% binder composition.

[0030] In this embodiment, a preparation method of a lithium-ion power battery comprises the following steps:

[0031] A. Production of positive electrode materials: Mix iron sulfide, carbon nanotubes, lithium cobaltate, graphite, and tin carbonate and add them to a stirring tank for low-speed stirring at a rate of 90 rpm for 6 minutes, and then coat the stirred mixture On the aluminum foil, baked at 105°C for 3.5 hours in a vacuum environment, cooled naturally, and then pressed into sheets to obtain the positive electrode sheet;

[0032] B. Preparation of negative electrode material: mix lithium titanate, nano-metal particles and binder, add them to a water bath an...

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Abstract

The invention discloses a lithium ion power battery and a preparation method therefor. A positive electrode plate of the lithium ion power battery consists of iron disulfide, carbon nanotubes, lithiumcobalt oxide, graphite and tin carbonate; and a negative electrode plate of the lithium ion power battery consists of lithium titanate, nanometer metal particles and a binder. The preparation methodprovided by the invention is simple and the prepared lithium ion power battery is excellent in rate charging and discharging, long in cycle life, and high in electrochemical performance and safety.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium-ion power battery and a preparation method for the lithium-ion power battery. Background technique [0002] The world's energy and environmental protection situation is becoming increasingly tense, and batteries are increasingly favored by people as a new energy source. Due to its high energy density, light volume, small weight, environmental protection and pollution-free, lithium-ion batteries have become the main direction of new energy development. With the rapid development of electric vehicles, space technology, national defense industry, and power storage systems, higher requirements are put forward for the specific capacity, cycle life, and safety of secondary batteries, and the electrochemical performance of batteries is improved. It can start with electrode materials and other aspects. [0003] Traditional lithium-ion batteries all use graphite as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/485H01M4/525H01M4/58H01M4/587H01M4/62H01M10/0525H01M10/0585B82Y30/00
CPCB82Y30/00H01M4/364H01M4/38H01M4/485H01M4/525H01M4/5815H01M4/5825H01M4/587H01M4/622H01M10/0525H01M10/0585Y02E60/10Y02P70/50
Inventor 杜成秀
Owner BEIJING JUNXIU CONSULTATION CO LTD
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