Three-dimensional lithium ion battery and preparation method

A lithium-ion battery, three-dimensional technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of restricting the development of two-dimensional flat-electrode lithium-ion batteries, short cycle life, poor rate performance, etc. Charge and discharge requirements, sufficient active material properties, and the effect of increasing the conductive interface

Pending Publication Date: 2018-03-20
湖北猛狮新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its low energy density, the driving electric car has short mileage, poor rate performance, long charging time, poor safety performance, short cycle life, etc., which restricts the development of two-dimensional flat electrode lithium-ion batteries in energy output and electric vehicle industry.

Method used

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  • Three-dimensional lithium ion battery and preparation method
  • Three-dimensional lithium ion battery and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A, positive electrode sheet 4 preparation method:

[0030] A1. Add 97% nickel-cobalt-aluminate lithium (NCA), positive electrode additive nano-Al 2 o 3 1%, 1% positive electrode conductive agent, 1% positive electrode binder by weight, add to the mixer barrel and mix evenly, then add N-methylpyrrolidone (NMP) according to the weight of 40% solid content, stir and mix evenly to prepare positive electrode slurry material;

[0031] A2, and then use a coating machine, the positive electrode slurry according to 40mg / cm 2 The surface density weight is uniformly coated on the three-dimensional foam porous aluminum foil with a thickness of 0.1mm, a pore diameter of 0.05mm, and a porosity of 80%, and is dried in a coating machine oven to prepare a positive electrode sheet with uniform surface density and thickness.

[0032] B, preparation method of negative electrode sheet 3:

[0033] B1. Add 95% silicon-carbon anode material (Si-C), and anode additive nano-Al 2 o 3 1%, 1%...

Embodiment 2

[0037] A, positive electrode sheet 4 preparation method:

[0038] A1. Add 94% nickel-cobalt-manganese-manganese oxide (NCM), positive electrode additive nano-Al 2 o 3 1.5%, positive electrode conductive agent 2%, positive electrode binder 2.5% by weight, add to the mixer barrel and mix evenly, then add N-methylpyrrolidone (NMP) according to the weight of 55% solid content, stir and mix evenly to prepare positive electrode slurry material;

[0039] A2, and then use a coating machine, the positive electrode slurry according to 50mg / cm 2 The areal density weight is uniformly coated on a three-dimensional foamed porous aluminum foil with a thickness of 2mm, a pore diameter of 5mm, and a porosity of 50%, and is dried in a coating machine oven to prepare a positive electrode sheet 4 with uniform areal density and thickness.

[0040] B, preparation method of negative electrode sheet 3:

[0041]B1. The silicon-oxygen negative electrode material (SiO) is 93.5%, and the negative ele...

Embodiment 3

[0045] A, positive electrode sheet 4 preparation method:

[0046] A1. Mix 90% of the mixture of nickel-cobalt-lithium-aluminate (NCA) and nickel-cobalt-lithium-manganate (NCM) at a ratio of 1:1, and the positive electrode additive nano-Al 2 o 3 2%, positive electrode conductive agent 3%, positive electrode binder 5% proportioning weight into the mixer barrel and mix evenly, then add N-methylpyrrolidone (NMP) according to the weight of 68% solid content, stir and mix evenly to prepare positive electrode slurry material;

[0047] A2, and then use a coating machine, the positive electrode slurry according to 60mg / cm 2 The areal density weight is evenly coated on the three-dimensional foamed porous aluminum foil with a thickness of 5mm, a pore diameter of 10mm, and a porosity of 30%, and is dried in a coating machine oven to prepare a positive electrode sheet 4 with uniform areal density and thickness.

[0048] B, preparation method of negative electrode sheet 3:

[0049] B1. ...

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Abstract

The invention discloses a three-dimensional lithium ion battery and a preparation method and aims to manufacture lithium ion batteries. The anode and the cathode of the three-dimensional lithium ion battery are respectively made of three-dimensional foamed porous aluminum and copper foil, the thickness of the battery is 0.1-5mm, the aperture of the battery is 0.05-10mm, and the porosity of the battery is 30-80%. According to the three-dimensional lithium ion battery, three-dimensional foamed porous structured aluminum and copper foil are respectively adopted as frameworks of an anode plate anda cathode plate, one or two mixtures of nickel-cobalt lithium aluminate and nickel-cobalt lithium manganate are adopted as an anode material, one or two mixtures of a silicon-carbon anode and a silicon oxygen cathode are adopted as a cathode material, and nano Al2O3 for doping and coating is added into the anode material and the cathode material, so that the electric conductive interface of a lithium ion battery active substance is increased, the interface resistance is reduced, the multiplying power charge and discharge performance of an electrode is improved, rapid charge and discharge requirements of power batteries are met, the properties of active substances are relatively sufficiently brought into play, the thickness of an electrode piece is increased, the energy density of the battery is increased, charge migration routes of electrode pieces are changed, the security performance of the battery is improved, and the manufacturing cost of the battery is reduced.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a three-dimensional lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion battery is a high-tech product. In addition to being used in the IT industry, it is mainly used in mining vehicles, electric vehicles, electric bicycles, electric motorcycles, electric track vehicles, clean energy storage and other fields. Its research and development, production and sales With the strong support of national policies, the domestic industrial chain is mature and the market is growing rapidly, but the technology currently used is still limited to the traditional two-dimensional flat electrode lithium-ion battery manufacturing. Due to its low energy density, the driving electric car has short mileage, poor rate performance, long charging time, poor safety performance, and short cycle life, which restrict the development of two-dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01M4/62H01M4/131H01M4/134H01M10/0525H01M10/058
CPCH01M4/131H01M4/134H01M4/62H01M4/808H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 赖见李青海刘进康书文袁智斌秦聚鑫
Owner 湖北猛狮新能源科技有限公司
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