A kind of preparation method of positive electrode of lithium-ion secondary battery for electric toothbrush or electric shaver

An electric shaver, electric toothbrush technology, applied in secondary batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of prolonging the use time of lithium batteries, short use time, long storage time, etc., to reduce self-discharge phenomenon, Avoid decomposition and reduce the effect of side reactions

Active Publication Date: 2020-10-09
高霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the improvement of people's pursuit of quality of life, more and more electric smart products have entered people's family life, such as electric toothbrushes and electric shavers. The development of these electric smart products has brought people's lives This kind of electric smart product is powered by a rechargeable lithium battery when it is in use. When the power is low, the rechargeable lithium battery is charged. If you need to go on a business trip, you often need to carry an electric toothbrush, electric razor Knives, in order to be used normally, usually need to be equipped with a charging base, which will cause inconvenience, and this kind of electric smart product is used every day, but usually the use time is short and the storage time is long. If the rechargeable lithium battery can be reduced The self-discharge phenomenon of the battery in the non-use state will prolong the use time of the lithium battery. If you are on a short-term business trip, you don’t need to carry the charging base, which brings great convenience to life and reduces energy waste.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of LiMPO with Ir-doped surface of positive electrode active material 4 , M is Co 1 / 3 Ni 1 / 3 Mn 1 / 3 , The core of the positive active material is LiMPO 4 , The shell is LiCo 1 / 3-x Ni 1 / 3 Mn 1 / 3 Ir x PO 4 , X=0.02.

[0031] Step 1. After preparing cobalt nitrate, nickel nitrate, manganese nitrate and phosphoric acid in a ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol and put it into a ball milling tank, using zirconium balls as the ball milling medium Perform ball milling and mixing. The ball milling speed is 200r / min and the ball milling time is 4 hours. Then, it is washed alternately with deionized water and ethanol and dried to obtain mixture A. The cobalt nitrate, nickel nitrate, manganese nitrate, iridium nitrate and phosphoric acid / 3-x): 1 / 3:1 / 3:x:1, add ethylene glycol, put it into the ball milling tank, use zirconium balls as the ball milling medium for ball milling and mixing, the ball milling speed is 300r / min, The ball milling time is 3 hours, and ...

Embodiment 2

[0040] (1) Preparation of LiMPO with Ir-doped surface of positive electrode active material 4 , M is Co 1 / 3 Ni 1 / 3 Mn 1 / 3 , The core of the positive active material is LiMPO 4 , The shell is LiCo 1 / 3 Ni 1 / 3-x Mn 1 / 3 Ir x PO 4 , X=0.03.

[0041] Step 1. After preparing cobalt chloride, nickel chloride, manganese chloride and phosphoric acid in a ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol and put it into a ball mill tank, and use zirconium balls For ball milling media, the ball milling speed is 300r / min, and the ball milling time is 3 hours. Then it is washed alternately with deionized water and ethanol and dried to obtain mixture A. Combine cobalt chloride, nickel chloride, manganese chloride, and chlorine After preparing the iridium and phosphoric acid in the ratio of 1 / 3: (1 / 3-x): 1 / 3: x:1, add ethylene glycol, put it into the ball milling tank, and use the zirconium ball as the ball milling medium for ball milling. The ball milling speed is 350r / min, and the ball milling ti...

Embodiment 3

[0050] (1) Preparation of LiMPO with Ir-doped surface of positive electrode active material 4 , M is Co 1 / 3 Ni 1 / 3 Mn 1 / 3 , The core of the positive active material is LiMPO 4 , The shell is LiCo 1 / 3 Ni 1 / 3 Mn 1 / 3-x Ir x PO 4 , X=0.04.

[0051] Step 1. After preparing cobalt chloride, nickel chloride, manganese chloride and phosphoric acid in a ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol and put it in a ball mill tank. For ball milling media, the ball milling speed is 300r / min, and the ball milling time is 3 hours. Then it is washed alternately with deionized water and ethanol and dried to obtain mixture A. Combine cobalt chloride, nickel chloride, manganese chloride, and chlorine After preparing the iridium and phosphoric acid in the ratio of 1 / 3: 1 / 3: (1 / 3-x): x:1, add ethylene glycol and put it into the ball milling tank. Use zirconium balls as the ball milling medium for ball milling and mixing. The ball milling speed is 350r / min, and the ball milling time is 2 hours. Then, ...

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PUM

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Abstract

The invention relates to a preparation method of a positive electrode of a lithium-ion secondary battery for an electric toothbrush or an electric shaver. The condition that Ir is located on the surface of an active material is ensured by adding the Ir to the surface of the positive active material and adopting a microwave preparation method through a core / shell preparation method; meanwhile, decomposition of an electrolyte is avoided by adding a self-discharge inhibitor to the preparation process of the positive electrode; finally, lithium ions in the electrolyte are prevented from entering a positive electrode material again in the charging process by combining an ageing treatment process of the active material; and through mutual combination and synergistic action of the three aspects, the self-discharge phenomenon of the lithium-ion battery is reduced, the working time is prolonged, and the service time is 50%-60% longer than a common phosphate lithium salt positive electrode material when the positive electrode is used for the electric toothbrush or the electric shaver.

Description

Technical field [0001] The present invention relates to the technical field of lithium ion secondary batteries and smart homes, and in particular to a method for preparing a positive electrode of a lithium ion secondary battery for an electric toothbrush or an electric shaver that inhibits battery self-discharge and improves the service life of the battery. Background technique [0002] At present, with the improvement of people’s pursuit of quality of life, more and more electric smart products have entered people’s home lives, such as electric toothbrushes and electric shavers. The development of these electric smart products brings people’s lives For great convenience, this electric smart product is characterized by being powered by a rechargeable lithium battery when in use. When the power is low, the rechargeable lithium battery is charged. If you need to travel on business, you often need to carry an electric toothbrush and electric shaver. For normal use, the knife usually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/1397H01M4/04H01M10/0525
CPCH01M4/0404H01M4/1397H01M4/366H01M4/62H01M10/0525H01M2004/028H01M2220/30Y02E60/10
Inventor 高霞
Owner 高霞
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