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

A technology for lithium-ion batteries and positive electrode materials, applied in lithium oxide;/hydroxide, nickel compound, electrode manufacturing, etc., can solve the problems of high process cost, complicated equipment, and high price

Inactive Publication Date: 2004-07-21
XINXIANG ZHONGKE SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cathode 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 of high capacity lithium ion battery lithium cobalt manganese nickel oxide positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] Operation (1) The atomic ratio of lithium and cobalt, manganese, nickel is 1 and the atomic ratio of cobalt: manganese: nickel is a lithium source, a cobalt source, a manganese source, and a nickel source. 6% of the weight ratio is added to polyacrylamide, and 5% of the atomic ratio of cobalt, manganese and nickel is added to neodymium oxide, and the mixture is evenly stirred to form a gel.

[0006] Step (2) Dry the jelly obtained in the above step (1) in a drying oven at 150° C. for 30 hours, then weigh a certain amount of dried material and ball mill it for 5 hours, and pass through a 300-mesh vibrating sieve.

[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 700°C for 3 hours, and passed through a 300-mesh sieve.

Embodiment 2

[0010] Operation (1) The atomic ratio of lithium and cobalt, manganese, nickel is 1.02 and the atomic ratio of cobalt: manganese: nickel is the mixing of lithium source and cobalt source, manganese source, nickel source, and mixes according to this 6% of the weight ratio is added to polyacrylamide, and 5% of the atomic ratio of cobalt, manganese and nickel is added to neodymium oxide, and the mixture is evenly stirred to form a gel.

[0011] Step (2) Dry the jelly obtained in the above step (1) in a drying oven at 150° C. for 30 hours, then weigh a certain amount of dried material and ball mill it for 5 hours, and pass through a 300-mesh vibrating sieve.

[0012] Step (3) The powder material obtained in the above step (2) was pre-fired at 350° C. for 10 hours and cooled naturally.

[0013] Step (4) The powder pre-burned in the above step (3) is then ground, finely ground, sieved, then burned at 750°C for 3 hours, and passed through a 300-mesh sieve for use.

Embodiment 3

[0015] Operation (1) the atomic ratio of lithium and cobalt, manganese, nickel is 1.05 and the atomic ratio of cobalt: manganese: nickel is the mixing material of lithium source and cobalt source, manganese source, nickel source, mixes according to this 8% of the weight ratio is added to polyacrylamide, and 6% of the atomic ratio of cobalt, manganese and nickel is added to neodymium oxide, and the mixture is evenly stirred to form a gel.

[0016] Step (2) Dry the jelly obtained in the above step (1) in a drying oven at 150° C. for 30 hours, then weigh a certain amount of dried material and ball mill it for 5 hours, and pass through a 300-mesh vibrating sieve.

[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 through a 300-mesh sieve for use.

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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 high-capacity lithium-ion battery lithium-cobalt-manganese-nickel oxide cathode material. 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 sp...

Claims

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Application Information

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