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A polymer lithium ion battery for high energy density mobile power supply

A high-energy-density, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of affecting the service life of the battery, the battery is easy to bloat, and the battery price is high, so as to reduce the phenomenon of fragmentation, increase flexibility, The effect of shortening the batching time

Active Publication Date: 2020-08-11
江西格林德能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the particularity of the high-voltage nickel-cobalt-lithium manganese oxide material itself, it is easy to absorb water during processing, and the battery is easy to swell during storage or use, which seriously affects the service life of the battery, and the price of the battery sold is high, so it is still not possible. Completely replace 18650 as a mobile power battery

Method used

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  • A polymer lithium ion battery for high energy density mobile power supply
  • A polymer lithium ion battery for high energy density mobile power supply
  • A polymer lithium ion battery for high energy density mobile power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of high energy density polymer lithium ion battery of the present embodiment, its preparation comprises the following steps:

[0043] (1) Preparation of positive electrode sheet:

[0044] The mass percentage of each component of the positive electrode is positive active material: carbon nanotube: KS-6 (conductive graphite): PVDF (polyvinylidene fluoride) = 97.8:0.5:0.4:1.3, as follows:

[0045] A. Add polyvinylidene fluoride and N-methylpyrrolidone into the high-speed shear disperser at a ratio of 0.08:1, the vacuum degree is -0.09MPa, the revolution is 70rmp, the rotation is 2400rmp, and the adhesive glue is obtained by stirring for 120min;

[0046] B. Add carbon nanotube conductive agent and micron-sized conductive graphite KS-6 into the glue solution, the vacuum degree is -0.09MPa, the revolution is 70rmp, the rotation is 2400rmp, and the stirring is 90min to obtain the nano-micron composite conductive agent;

[0047] C. Add 50% of the total amount of high-vo...

Embodiment 2

[0062] A kind of high energy density polymer lithium ion battery of the present embodiment, its preparation comprises the following steps:

[0063] (1) Preparation of positive electrode sheet:

[0064] The mass percentage of each component of the positive electrode is positive active material: carbon nanotube: KS-6 (conductive graphite): PVDF (polyvinylidene fluoride) = 96.8:0.8:0.7:1.7, as follows:

[0065] A. Add polyvinylidene fluoride and N-methylpyrrolidone into the high-speed shear disperser at a ratio of 0.08:1, the vacuum degree is -0.10MPa, the revolution is 60rmp, the rotation is 2300rmp, and the adhesive glue is obtained by stirring for 90min;

[0066] B. Add carbon nanotube conductive agent and micron-sized conductive graphite KS-6 into the glue solution, the vacuum degree is -0.10MPa, the revolution is 60rmp, the rotation is 2300rmp, and the stirring is 120min to obtain the nano-micron composite conductive agent;

[0067] C. Add 50% of the total amount of high-vo...

Embodiment 3

[0082] A kind of high energy density polymer lithium ion battery of the present embodiment, its preparation comprises the following steps:

[0083] (1) Preparation of positive electrode sheet:

[0084] The mass percentage of each component of the positive electrode is positive active material: carbon nanotube: KS-6 (conductive graphite): PVDF (polyvinylidene fluoride) = 96.0:1.3:1.0:1.7, as follows:

[0085] A. Add polyvinylidene fluoride and N-methylpyrrolidone into the high-speed shear disperser at a ratio of 0.08:1, the vacuum degree is -0.08MPa, the revolution is 65rmp, the rotation is 2500rmp, and the adhesive glue is obtained by stirring for 105min;

[0086] B. Add carbon nanotube conductive agent and micron-sized conductive graphite KS-6 into the glue solution, the vacuum degree is -0.08MPa, the revolution is 65rmp, the rotation is 2500rmp, and the stirring is 105min to obtain the nano-micron composite conductive agent;

[0087] C. Add 50% of the total amount of high-v...

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Abstract

The invention discloses a polymer lithium-ion battery for high-energy-density mobile power supply. The positive plate of the battery is composed of positive active material, carbon nanotube conductive agent, micron-sized conductive graphite, and PVDF according to a certain mass ratio, and NMP is used as a solvent. , using a high-speed shear dispersion mechanism to slurry and then coat it on an aluminum foil current collector; the negative electrode sheet is made of negative active material, spherical nanoscale conductive carbon black, CMC, and SBR according to a certain mass ratio, using deionized water as a solvent. It is made by high-speed shearing and dispersing machine slurry, and then coated on the copper foil current collector; the lithium-ion battery is made by winding the positive electrode sheet, the negative electrode sheet, and the separator. The volumetric energy density of the polymer lithium-ion battery for mobile power produced by the present invention can reach 530Wh / L~560Wh / L, the capacity of 400 cycles at 0.5C can be kept greater than 80%, and the production cost is controlled at 2.3 yuan / Ah~2.5 yuan / Ah, has an excellent cost-effective advantage.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery manufacturing, and in particular relates to a polymer lithium-ion battery for a high-energy-density mobile power supply. Background technique [0002] With the popularization of entertainment devices such as mobile phones and tablet computers, the battery life of lithium-ion batteries, one of the important components, cannot meet the needs of people for more than 8 hours of continuous use, and the charging place is not always accompanied by a free-moving person. So there is a kind of portable mobile power supply, which can charge entertainment devices such as mobile phones and tablet computers without power at any time, which is convenient and fast. [0003] The lithium-ion batteries used in the early mobile power supplies on the market were mostly 18650, mainly because 18650 batteries are cheap under the same capacity. Because 18650 batteries have great potential safety hazards, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62H01M4/60H01M10/0587H01M10/0525C01B32/158
CPCH01M4/583H01M4/602H01M4/625H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 李露黄小李国敏
Owner 江西格林德能源有限公司
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