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Lithium ion battery piezoelectric positive electrode composite pole piece and lithium ion battery application thereof

A technology of lithium ion battery and positive electrode plate, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve problems such as poor safety performance, achieve low expansion rate, strong adhesion, and improve conduction rate Effect

Inactive Publication Date: 2017-06-20
JIANGSU LENENG BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of poor safety performance of current lithium-ion batteries, the purpose of the present invention is to improve the safety performance of lithium-ion batteries by coating the piezoelectric ceramic material on the surface of the positive pole piece by coating technology

Method used

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  • Lithium ion battery piezoelectric positive electrode composite pole piece and lithium ion battery application thereof
  • Lithium ion battery piezoelectric positive electrode composite pole piece and lithium ion battery application thereof
  • Lithium ion battery piezoelectric positive electrode composite pole piece and lithium ion battery application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of lithium-ion battery piezoelectric cathode composite pole piece:

[0021] Weigh 8.5g of polyvinylidene fluoride and 1.5g of polystyrene carbonate and add them to 500g of N-methylpyrrolidine, and disperse evenly to obtain a binder solution; then weigh 1.5 times the binder solution, and add 5g of oxidation Graphene and 5g of alkyl glucoside thereof, and uniformly dispersed, then added 70g of barium titanate ceramic material, and uniformly dispersed by a ball mill to obtain piezoelectric ceramic composite slurry;

[0022] At the same time, weigh 5g of polyvinylidene fluoride, dissolve it in 200g of N-methylpyrrolidone and disperse evenly, then add 5g of SP conductive agent and its 90g of LiNi 1 / 3 co 1 / 3 mn 1 / 3 O2 The ternary material prepares the slurry, and then coats the slurry on the upper surface of the positive electrode aluminum foil current collector A by a coating machine, and obtains the positive electrode sheet containing the active material layer...

Embodiment 2

[0025] Weigh 8.0g of polyvinylidene fluoride and 2.0g of polystyrene carbonate and add them to 500g of N-methylpyrrolidine, disperse evenly to obtain a binder solution; then weigh the above binder solution, and add 1g of vapor phase growth Carbon fiber and 1g of ammonium oxide are uniformly dispersed, then 80g of lead titanate ceramic material is added, and uniformly dispersed by a ball mill to obtain piezoelectric ceramic composite slurry;

[0026] At the same time, weigh 5g of polyvinylidene fluoride, dissolve it in 200g of N-methylpyrrolidone and disperse evenly, then add 5g of SP conductive agent and its 90g of LiNi 1 / 3 co 1 / 3 mn 1 / 3 O2 The ternary material prepares a slurry, and then coats the slurry on the upper surface of the positive electrode aluminum foil current collector A by a coating machine, and obtains a positive electrode sheet containing an active material layer B on the surface of the current collector after drying;

[0027] Afterwards, the piezoelectric c...

Embodiment 3

[0029] Weigh 9.0g of polyvinylidene fluoride and 1.0g of polystyrene carbonate and add it to 500g of N-methylpyrrolidine, and disperse evenly to obtain a binder solution; then weigh 2 times the binder solution and add 10g of carbon Nanotubes and 10g of glyceride thereof, and uniformly dispersed, then added 60g of lead magnesium niobate ceramic material, and uniformly dispersed by a ball mill to obtain piezoelectric ceramic composite slurry;

[0030] At the same time, weigh 5g of polyvinylidene fluoride, dissolve it in 200g of N-methylpyrrolidone and disperse evenly, then add 5g of SP conductive agent and its 90g of LiNi 1 / 3 co 1 / 3 mn 1 / 3 O2 The ternary material prepares a slurry, and then coats the slurry on the upper surface of the positive electrode aluminum foil current collector A by a coating machine, and obtains a positive electrode sheet containing an active material layer B on the surface of the current collector after drying;

[0031] Afterwards, the piezoelectric c...

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Abstract

The invention belongs to the field of lithium ion battery preparation, and particularly relates to a lithium ion battery piezoelectric positive electrode composite pole piece and a lithium ion battery application thereof. The positive electrode compound pole piece consists of a positive electrode pole piece and a piezoelectric ceramic composite layer, and the positive electrode piezoelectric composite pole piece is prepared through electric field polarization treatment. The piezoelectric positive electrode composite pole piece disclosed by the invention is applied to the lithium ion battery; when the battery pole piece is extruded, the battery discharges so as to improve the safety performance of the battery; meanwhile, the transmission rate of lithium ions in the lithium ion charging and discharging process of the battery is improved; and the fast charge capability and the multiplying power performance of the lithium ion battery can be improved.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery preparation, in particular to a lithium-ion battery piezoelectric cathode composite pole piece and the application of the lithium-ion battery. Background technique [0002] Lithium-ion secondary batteries are favored by people because of their high energy density, long cycle life, and environmental friendliness. The safety performance of lithium-ion batteries is the key to determining whether the battery can be popularized and applied. At present, lithium batteries mainly have the following potential safety hazards: the internal short circuit of the battery, the external short circuit, and the precipitation of metal lithium caused by overcharging and overdischarging will all cause the battery to burn. In order to improve the safety performance of the battery, the safety performance of the battery is mainly improved through the use of ceramic diaphragms, functional electrolytes and electrode coat...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/62H01M4/139H01M10/42H01M10/0525
CPCH01M4/13H01M4/139H01M4/621H01M4/624H01M10/0525H01M10/4235Y02E60/10
Inventor 丁建民
Owner JIANGSU LENENG BATTERY INC
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