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Preparation method for lithium cobalt manganese nickel oxide positive electrode material of high capacity lithium ion battery

A lithium-ion battery, lithium-cobalt-manganese-nickel technology, which is applied in the field of preparation of lithium-ion battery lithium-cobalt-manganese-nickel oxide cathode materials, can solve the problems of unfavorable large-scale promotion and use of lithium-ion batteries, complicated equipment, and high price

Inactive Publication Date: 2006-03-15
XINXIANG ZHONGKE SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The positive electrode material used in the commercial production of lithium-ion batteries is lithium cobalt oxide. Due to the lack of cobalt resources and high prices, it is not conducive to the large-scale promotion and use of lithium-ion batteries.
At present, replacing cobalt with manganese and nickel is one of the effective ways to reduce the cost of materials. There are many literatures reporting the preparation method and performance of Li-Cox-Mny-Nil-yO2. high cost

Method used

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  • Preparation method for lithium cobalt manganese nickel oxide positive electrode material of high capacity lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] Operation (1) the atomic ratio of lithium and (cobalt+manganese+nickel) is 1 and cobalt: manganese: the mixing material mixing of the lithium source and cobalt source, manganese source, nickel source that the atomic ratio of nickel is 1, press here 6% of the weight ratio of the mixture is added to polyacrylamide, and the number of neodymium atoms of neodymium oxide is 5% of the number of atoms of (cobalt+manganese+nickel), and the mixture is stirred evenly to form a colloidal material.

[0006] Step (2) The jelly obtained in the above step (1) is dried in a drying oven at 150° C. for 30 hours, weighed a certain amount of dried material and ball milled for 5 hours, and passed through a 300-mesh vibrating sieve to form a powder.

[0007] Step (3) The powder material obtained in the above step (2) was pre-fired at 300° C. for 10 hours and cooled naturally.

[0008] Step (4) The powder pre-calcined in the above step (3) is then ground, finely ground, sieved, then burned at ...

Embodiment 2

[0010] Operation (1) is that the atomic ratio of lithium and (cobalt+manganese+nickel) is 1.02 and the atomic ratio of cobalt: manganese: nickel is the mixing material of lithium source and cobalt source, manganese source, nickel source that is 1, press here 6% of the weight ratio of the mixture is added to polyacrylamide, and the number of neodymium atoms of neodymium oxide is 5% of the number of atoms of (cobalt+manganese+nickel), and the mixture is stirred evenly to form a colloidal material.

[0011] Step (2) The jelly obtained in the above step (1) is dried in a drying oven at 150° C. for 30 hours, weighed a certain amount of dried material and ball milled for 5 hours, and passed through a 300-mesh vibrating sieve to form a powder.

[0012] Step (3) The powder material obtained in the above step (2) was pre-fired at 300° C. for 10 hours and cooled naturally.

[0013] Step (4) The powder pre-calcined in the above step (3) is then ground, finely ground, sieved, then burned ...

Embodiment 3

[0015] Operation (1) the atomic ratio of lithium and (cobalt+manganese+nickel) is 1.05 and cobalt: manganese: the atomic ratio of nickel is the lithium source of 1 and the mixing source of cobalt source, manganese source, nickel source, press here Add polyacrylamide to 8% of the weight ratio of the mixture, add neodymium oxide whose number of neodymium atoms is 5% of the number of (cobalt+manganese+nickel) atoms, and stir evenly to form a colloidal material.

[0016] Step (2) The jelly obtained in the above step (1) is dried in a drying oven at 150° C. for 30 hours, weighed a certain amount of dried material and ball milled for 5 hours, and passed through a 300-mesh vibrating sieve to form a powder.

[0017] Step (3) The powder material obtained in the above step (2) was pre-fired at 400° C. for 10 hours and cooled naturally.

[0018] Step (4) The powder material pre-calcined in the above step (3) is ball milled, pulverized, sieved, burned at 650°C for 3 hours, and passed thro...

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Abstract

The method consists of procedures of solid phase synthesis and burning in high temperature including following steps. (1) According to lithium: cobalt, manganese, nickel=1-1.1 : 1 (atomic ratio), and cobalt : manganese : nickel=1:1:1, polyacrylamide and neodymia are added into even mixed sources of cobalt, manganese, nickel. The above admixture is mixed round evenly till it becoming colloid. (2) Baking drys the said colloid for 30 hr. under 150 deg.C, and ball milling is carried out till powder is passed through sieve. (3) With being preburned for 10 hr. at 300-450 deg.C, the said powder is cooled to room temperature. (4) Product is obtained after fine ball milling the preburned powder, passing through sieve, burning and sifting the powder by 300 screen mesh again. Comparing with prior art, the invented method adds polyacrylamide and neodymia as well as preburning step so as to possess features of high specific capacity, good cycle performance and pollution-free.

Description

Technical field: [0001] The invention relates to a battery, in particular to a method for preparing a lithium-cobalt-manganese-nickel oxide cathode material for a lithium ion battery. Background technique: [0002] The positive electrode material used in the commercial production of lithium-ion batteries is lithium cobalt oxide. Due to the lack of cobalt resources and high prices, it is not conducive to the large-scale promotion and use of lithium-ion batteries. At present, replacing cobalt with manganese and nickel is one of the effective ways to reduce the cost of materials. There are many literatures reporting the preparation method and performance of Li-Cox-Mny-Nil-yO2. high cost. Invention content: [0003] The technical problem to be solved in the present invention is to design a method for preparing a lithium-cobalt-manganese-nickel oxide positive electrode material for a lithium ion battery. The prepared positive electrode material has a high reversible specific c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/48H01M4/58C01D15/02C01G1/02H01M4/02H01M4/50H01M4/52
CPCY02E60/122C01G53/006H01M4/0471H01M4/505C01G53/44H01M4/525H01M4/1391C01P2006/40Y02E60/10
Inventor 崔成伟杨书廷张希平张彦航
Owner XINXIANG ZHONGKE SCI&TECH