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Safe lithium ion battery with anode added with nanometer resinae solid fire retardant, and manufacturing method therefor

A solid flame retardant, ion battery technology, applied in the field of lithium ion batteries, can solve the problems of high cost, external circuit addition, no addition of resin-based solid flame retardant to positive pole pieces, etc., to achieve low cost and improve safety. , the effect of resolving instability

Active Publication Date: 2015-08-12
厦门华理能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the safety of lithium-ion batteries mostly adds protection measures to external circuits, which cannot fundamentally solve the problem.
The solution considered from the battery's own internal materials is still in exploration, mainly focusing on the research and application of flame retardant additives in the electrolyte. Regarding the research on adding flame retardants to battery active materials, patent CN101252189 discloses a The technology of doping ammonium polyphosphate in the electrode active material of ion battery can make the pole piece form a complete, uniform and dense SEI film during the cycle, thereby reducing the chance of SEI film decomposition and exothermic reaction at high temperature, but Once the SEI film is thermally decomposed, thermal runaway is inevitable, and ammonium polyphosphate is also a high-cost flame retardant additive.
The current research has not seen the addition of cheap and efficient resin-based solid flame retardants to the positive electrode.

Method used

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  • Safe lithium ion battery with anode added with nanometer resinae solid fire retardant, and manufacturing method therefor
  • Safe lithium ion battery with anode added with nanometer resinae solid fire retardant, and manufacturing method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A safe lithium-ion battery with nano-resin solid flame retardant added to the positive electrode. The battery structure includes four main materials: positive electrode, negative electrode, diaphragm, and electrolyte. Nano-resin solid flame retardant is added to the positive electrode material. The combustion agent is phenyl silicone resin; the positive electrode material is ternary nickel-cobalt-manganese; the negative electrode material is a carbon material that can deintercalate lithium; the diaphragm is a common PP diaphragm; the electrolyte is carbonate electrolyte; nano-resin solid flame retardant The particle size is 50nm;

[0027] Its preparation method: comprises the following steps:

[0028] 1) Mix positive electrode ternary nickel-cobalt-manganese material with solid flame retardant additive phenyl silicone resin, conductive agent Super P, adhesive PVDF, and solvent in a ratio of 90:2:4:4:100;

[0029] 2) Coating and sheeting the positive electrode slurry to...

Embodiment 2

[0033] A safe lithium-ion battery with nano-resin solid flame retardant added to the positive electrode. The battery structure includes four main materials: positive electrode, negative electrode, separator, and electrolyte. Nano-resin solid flame retardant is added to the positive electrode material. The fuel is phenyl silicone resin; the positive electrode material is lithium cobaltate; the negative electrode material is a carbon material that can deintercalate lithium; the diaphragm is a common PP diaphragm; the electrolyte is carbonate electrolyte; the particle size of the nano-resin solid flame retardant 10nm.

[0034] Its preparation method: comprises the following steps:

[0035] 1) Mix the cathode lithium cobaltate material with phenyl silicone resin, conductive agent Super P, binder PVDF, and solvent in a ratio of 90:2:4:4:100;

[0036] 2) Coating and sheeting the positive electrode slurry to obtain the positive electrode sheet;

[0037] 3) Laminate the positive ele...

Embodiment 3

[0040] A safe lithium-ion battery with nano-resin solid flame retardant added to the positive electrode. The battery structure includes four main materials: positive electrode, negative electrode, separator, and electrolyte. Nano-resin solid flame retardant is added to the positive electrode material. The flame retardant is epoxy resin; the positive electrode material is lithium nickelate; the negative electrode material is carbon alloy material; the diaphragm is PE diaphragm; the electrolyte is flame-retardant electrolyte; the particle size of the nano-resin solid flame retardant is 30nm.

[0041] Its preparation method: comprises the following steps:

[0042] 1) Mix positive lithium nickelate material with solid flame retardant additive epoxy resin, conductive agent Super P, adhesive PVDF, and solvent in a ratio of 90:2:4:4:100;

[0043] 2) Coating and sheeting the positive electrode slurry to obtain the positive electrode sheet;

[0044] 3) Laminate the positive electrode ...

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Abstract

The invention discloses a safe lithium ion battery with an anode added with a nanometer resinae solid fire retardant, and a manufacturing method therefor. As for the structure, the battery comprises four main materials: an anode, a cathode, a diaphragm and an electrolyte. An anode material is added with the nanometer resinae solid fire retardant, wherein the solid fire retardant is a mixture formed by at least one of phenyl silicon resin, epoxy resin and phenolic resin or at least one of phenyl silicon resin, epoxy resin and phenolic resin and ammonium polyphosphate and / or tetrabromobisphenol A. Through adoption of the lithium ion battery with the anode added with the nanometer resinae solid fire retardant, the problem of instability of components of the anode material is thoroughly solved, so that the safety of the battery is improved. The lithium ion battery has low raw material cost, a simple manufacturing method, and good repeatability, and is easy to realize industrial production.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, in particular to a safe lithium-ion battery with a positive electrode added with a nano-resin solid flame retardant and a preparation method thereof. Background technique [0002] Lithium-ion batteries are widely used in various industries, especially in electric bicycles and new energy vehicles. With the development of the industry, the performance requirements of lithium batteries are getting higher and higher. Safety issues are the main restrictive factors for the commercialization of high-capacity and power lithium-ion batteries, especially under abuse conditions (such as heating, overcharging, over-discharging, short-circuiting, vibration, extrusion, etc.) Even an explosion, serious casualties and other incidents will be caused. The safety accidents of lithium-ion batteries are mainly caused by the chemical reaction between the electrodes and the electrolyte. The solvent of the electro...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/13
CPCH01M4/13H01M10/0525H01M2220/20Y02E60/10
Inventor 罗贵仕陈慧鑫王继辉
Owner 厦门华理能源股份有限公司
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