High voltage lithium battery cell and preparation method therefor, and lithium ion battery

A technology for high-voltage lithium batteries and batteries, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, and final product manufacturing. High voltage and high energy density, improved battery safety and high cycle performance

Active Publication Date: 2016-04-06
BYD CO LTD
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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 provide a high-voltage lithium battery cell for the problem that the electrolyte of the high-voltage lithium battery in the prior art is easy to oxidize and cause the performance of the lithium battery to decline.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] This embodiment is used to illustrate the high-voltage lithium battery cell and the preparation method thereof disclosed in the present invention.

[0085] Production of positive electrode:

[0086] 930 grams of positive active material LiNi 0.5 Mn 1.5 O 4 , 30 g of adhesive PVDF, 20 g of acetylene black, and 20 g of conductive agent HV were added to 1500 g of solvent NMP (N-methylpyrrolidone), and then stirred in a vacuum mixer to form a stable and uniform positive electrode slurry. The positive electrode slurry was uniformly and intermittently coated on both sides of aluminum foil (aluminum foil size: 160 mm in width and 16 microns in thickness), then dried at 120° C., and pressed by a roller press to obtain a positive electrode.

[0087] Production of the first complex:

[0088] 950 grams of inorganic electrolyte particles Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , 5 grams of binder SBR is added to 1000 grams of deionized water, and then stirred in a vacuum mixer to form a stable and ...

Embodiment 2

[0096] This embodiment is used to illustrate the high-voltage lithium battery cell and the preparation method thereof disclosed in the present invention.

[0097] Production of positive electrode:

[0098] 930 grams of positive active material LiNi 0.5 Mn 1.5 O 4 , 30 g of adhesive PVDF, 20 g of acetylene black, and 20 g of conductive agent HV were added to 1500 g of solvent NMP (N-methylpyrrolidone), and then stirred in a vacuum mixer to form a stable and uniform positive electrode slurry. The positive electrode slurry was uniformly and intermittently coated on both sides of aluminum foil (aluminum foil size: 160 mm in width and 16 microns in thickness), then dried at 120° C., and pressed by a roller press to obtain a positive electrode.

[0099] Production of the first complex:

[0100] 950 grams of inorganic electrolyte particles Li 0.5 La 0.5 TiO 3 , 5 grams of binder SBR is added to 1000 grams of deionized water, and then stirred in a vacuum mixer to form a stable and uniform ino...

Embodiment 3

[0108] This embodiment is used to illustrate the high-voltage lithium battery cell and the preparation method thereof disclosed in the present invention.

[0109] Production of inorganic electrolyte layer:

[0110] 1000 grams of inorganic electrolyte particles Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 Sintered at 900°C to form an inorganic electrolyte layer with a thickness of 250 μm.

[0111] Production of the first complex:

[0112] 850 grams of cathode active material LiMn 2 O 4 , 80 grams of Li 3 PO 4 30 grams of adhesive polyvinylidene fluoride, 20 grams of carbon nanotubes, and 20 grams of conductive agent HV are added to 1800 grams of solvent NMP (N-methylpyrrolidone), and then stirred in a vacuum mixer to form a stable and uniform positive electrode slurry . The positive electrode slurry is uniformly and intermittently coated on the surface of the inorganic electrolyte layer. Then, it is dried at 120°C and pressed by a roller press to obtain the positive electrode material. Then the s...

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Abstract

For overcoming the problem of degradation of lithium battery performance caused by high probability of oxidization of an electrolyte of a high voltage lithium battery in the prior art, the invention provides a high voltage lithium battery cell. The high voltage lithium battery cell comprises a positive electrode, a negative electrode and an electrolyte positioned between the positive electrode and the negative electrode; the electrolyte comprises an inorganic electrolyte layer and a polymer electrolyte layer positioned on the surface of the inorganic electrolyte layer; the inorganic electrolyte layer is positioned on the surface of the positive electrode; and the polymer electrolyte layer is positioned on the surface of the negative electrode. Meanwhile, the invention also discloses a preparation method for the high voltage lithium battery cell and a lithium ion battery adopting the high voltage lithium battery cell. The high voltage lithium battery cell provided by the invention can overcome a large amount of negative problems caused by oxidization of the electrolyte, and the safety performance and the cycling performance of the lithium battery can be improved.

Description

Technical field [0001] The invention belongs to the field of high-voltage lithium-ion batteries, and in particular relates to a high-voltage lithium battery cell and a preparation method thereof, and a high-voltage lithium-ion battery using the high-voltage lithium battery cell. Background technique [0002] Compared with other batteries, lithium-ion batteries have the advantages of light weight, small size, high working voltage, high energy density, large output power, high charging efficiency, no memory effect, long cycle life, etc., not only in mobile phones, notebook computers and other fields It has been widely used and is considered to be one of the best choices for electric vehicles and large energy storage devices. However, current electronic digital products such as smart phones and tablet computers have increasingly higher requirements for battery energy density, making it difficult for commercial lithium-ion batteries to meet the requirements. Using high-capacity cath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 马永军易观贵郭姿珠
Owner BYD CO LTD
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