Preparation method of positive electrode of lithium-ion secondary battery for electric toothbrush or electric shaver

A technology for electric shavers and electric toothbrushes, applied in the direction of secondary batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of short use time, prolong the use time of lithium batteries, and long storage time, so as to avoid decomposition and reduce auto Discharge phenomenon, the effect of reducing side reactions

Active Publication Date: 2017-03-22
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 K...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of LiMPO doped with Ir on the surface of positive 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 LiM 1-x wxya 4 , x=0.02,

[0031] Step 1, after preparing cobalt nitrate, nickel nitrate, manganese nitrate and phosphoric acid according to the ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol, put it into a ball mill tank, and use zirconium balls as the ball mill medium Carry out ball milling and mix, ball milling speed is 200r / min, and ball milling time is 4 hours, then alternately wash with deionized water and ethanol, dry, obtain mixture A, with cobalt nitrate, nickel nitrate, manganese nitrate, iridium nitrate and phosphoric acid press (1 / 3-x):1 / 3:1 / 3:x:1 After the ratio is prepared, add ethylene glycol, put it into a ball mill tank, and use zirconium balls as the ball milling medium for ball milling and mixing, and the ball milling speed is 300r / min. The ball milling time was 3 hour...

Embodiment 2

[0040] (1) Preparation of LiMPO doped with Ir on the surface of positive active material 4 , M is Co 1 / 3 Ni1 / 3 mn 1 / 3 , the core of the positive active material is LiMPO 4 , the shell is LiM 1-x wxya 4 , x=0.03,

[0041] Step 1, after preparing cobalt chloride, nickel chloride, manganese chloride and phosphoric acid according to the ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol, put it into a ball mill jar, and use zirconium balls Carry out ball milling mixing for ball milling medium, ball milling speed is 300r / min, ball milling time is 3 hours, then alternately wash with deionized water and ethanol, dry, obtain mixture A, cobalt chloride, nickel chloride, manganese chloride, chlorine After preparing iridium and phosphoric acid according to the ratio of 1 / 3: (1 / 3-x): 1 / 3: x:1, add ethylene glycol, put it into a ball mill jar, and use zirconium balls as the ball milling medium for ball milling and mixing. The ball milling speed was 350r / min, and the ball milling time was 2 ...

Embodiment 3

[0050] (1) Preparation of LiMPO doped with Ir on the surface of positive 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 LiM 1-x wxya 4 , x=0.04,

[0051] Step 1, after preparing cobalt chloride, nickel chloride, manganese chloride and phosphoric acid according to the ratio of 1 / 3:1 / 3:1 / 3:1, add ethylene glycol, put it into a ball mill jar, and use zirconium balls Carry out ball milling mixing for ball milling medium, ball milling speed is 300r / min, ball milling time is 3 hours, then alternately wash with deionized water and ethanol, dry, obtain mixture A, cobalt chloride, nickel chloride, manganese chloride, chlorine After preparing iridium and phosphoric acid according to the ratio of 1 / 3: 1 / 3: (1 / 3-x): x: 1, add ethylene glycol, put it into a ball mill jar, and use zirconium balls as the ball milling medium for ball milling and mixing. The ball milling speed was 350r / min, and the ball milling time was...

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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 invention relates to the technical fields of lithium-ion secondary batteries and smart home, in particular to a method for preparing a positive electrode of a lithium-ion secondary battery used for electric toothbrushes or electric shavers, which can suppress battery self-discharge and improve battery life. 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 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 chargin...

Claims

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Application Information

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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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