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Using method of lithium ion battery modifying agent, lithium ion battery diaphragm, and battery

A lithium-ion battery and modifier technology, applied in secondary batteries, battery pack parts, circuits, etc., can solve the problems of the thermal stability of the separator and the unsuitable control of the uniformity of the coating, and improve the thermal stability. Effect

Active Publication Date: 2012-05-30
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since alumina is a poorly soluble substance, the uniformity of the coating is not suitable to be controlled, so that the thermal stability of the separator is affected

Method used

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  • Using method of lithium ion battery modifying agent, lithium ion battery diaphragm, and battery
  • Using method of lithium ion battery modifying agent, lithium ion battery diaphragm, and battery
  • Using method of lithium ion battery modifying agent, lithium ion battery diaphragm, and battery

Examples

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Embodiment 1

[0052] Embodiment 1: the preparation of lithium ion battery modifier

[0053] 34.5 g of 85% H 3 PO 4 and 14 grams of deionized water were added into a beaker to form a solution; the solution was magnetically stirred at 80°C for 5 minutes; 5.9 grams of Al(OH) 3 Join in the above-mentioned beaker, react 2 hours, the solution in the described beaker generates a sol-like liquid; Then, in this beaker, add 2.5 grams of CrO 3 powder, continue to react for 2 hours, so that the product in the beaker becomes a clear red solution.

[0054] (2) Application of modifiers for lithium-ion batteries

[0055] (1) For Li-ion battery current collector

[0056] The above lithium ion battery modifiers can be used to improve the stability of lithium ion batteries. Taking the current collector of lithium-ion battery as an example, since the modifier is a clear solution, it is easy to coat evenly on the surface of the current collector of lithium-ion battery, and after coating, drying and other t...

Embodiment 2

[0077] Embodiment 2: the preparation of lithium ion battery current collector

[0078] In the embodiment of the present invention, the lithium ion battery current collector with a protective film is prepared by using the above lithium ion battery modifier. In the embodiment of the present invention, aluminum foil is selected as the metal sheet, the thickness of the metal sheet is 20 μm, and the width is 30 mm. The preparation process of the lithium-ion battery current collector is as follows: add 0.5ml of triton and 30ml of water to the above-mentioned prepared lithium-ion battery modifier, and ultrasonically vibrate for 20 minutes to make it evenly mixed; The modifier is coated on the surface of the aluminum foil to form a coating layer; then the aluminum foil with the coating layer is placed in an oven at 80°C to dry for 0.5 hours, and finally the aluminum foil with the coating layer is put into the muffle furnace, Insulated at 200° C. for 1 hour to obtain the lithium ion b...

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Abstract

The invention relates to a using method of a lithium ion battery modifying agent, which comprises the steps of: providing a porous membrane used for a lithium ion battery diaphragm and the lithium ion battery modifying agent, wherein the lithium ion battery modifying agent comprises a phosphorus source comprising phosphate radicals, a trivalent aluminum source and a metal oxide which are mixed in a liquid phase solvent; and coating the lithium ion battery modifying agent on the surface of the porous membrane to form a coating layer, drying the porous membrane coated with the lithium ion battery modifying agent so as to form the modifying agent layer on the surface of the porous membrane. The using method is used for preparing the lithium ion battery diaphragm, and the lithium ion battery is applied to a lithium ion battery, thus thermal stability and safety of the lithium ion battery are improved.

Description

technical field [0001] The invention relates to a method for using a lithium-ion battery modifier in a lithium-ion battery, a lithium-ion battery separator, and a lithium-ion battery containing the separator. Background technique [0002] At present, with the rapid development of electric vehicles and portable electronic devices such as mobile phones, digital cameras and notebook computers, the market demand for high-power, high-energy-density batteries is increasing. Lithium-ion battery is the battery with the highest voltage and the largest energy density among the batteries that have been practical so far, and has a good development prospect. [0003] Lithium-ion batteries are mainly composed of electrodes, separators, and electrolytes. The separator is an important part of the lithium-ion battery. It plays the role of preventing short circuit of the electrodes and providing ion transmission channels during the charging and discharging process. Its performance directly a...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/0525
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 何向明蒲薇华张丽春任建国李建军高剑
Owner TSINGHUA UNIV