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Method for preparing nickle lithium manganate material for lithium ion power battery anode

A technology for lithium ion batteries and positive electrode materials, which is applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of unfavorable application, complicated steps, and high cost, and achieve the effects of low production cost, simple preparation method, and large discharge capacity.

Inactive Publication Date: 2009-06-24
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although other methods can prepare LiNi with better electrochemical performance x mn 2-x o 4 , but these methods have complicated steps or high costs, which are not conducive to practical application

Method used

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  • Method for preparing nickle lithium manganate material for lithium ion power battery anode
  • Method for preparing nickle lithium manganate material for lithium ion power battery anode
  • Method for preparing nickle lithium manganate material for lithium ion power battery anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh nickel nitrate and manganese nitrate with a Ni:Mn molar ratio of 0.5:1.5, mix them and add deionized water to make a 0.5mol / L solution. The obtained solution is dried with a high-speed centrifugal drying sprayer to obtain a mixed powder, and the feeding solution speed is 40ml / min; the gas flow rate of the nozzle is controlled by the pressure of compressed air, and the pressure is controlled at 0.4MPa; the air inlet temperature is 310°C, and the outlet temperature is 110°C. ℃. Weigh the mixed powder and lithium salt at a molar ratio of 2:1.06, weigh the mixed powder and lithium carbonate, mix them by ball milling, heat up at a rate of 10°C / min in an oxygen atmosphere, and calcinate at a constant temperature of 850°C for 5 hour, and then directly cool down to room temperature at a rate of 20°C / min, and after grinding, LiNi, a positive electrode material for lithium-ion power batteries with excellent electrochemical performance, can be prepared. 0.5 mn 1.5 o 4 . ...

Embodiment 2

[0020] Weigh nickel sulfate and manganese sulfate with a Ni:Mn molar ratio of 0.2:1.8, mix them and add deionized water to make a 1.0mol / L solution. The obtained solution was dried with a high-speed centrifugal drying sprayer to obtain a mixed powder, and the feed solution speed was 30ml / min; the gas flow rate of the nozzle was controlled by the pressure of compressed air, and the pressure was controlled at 0.4MPa; the air inlet temperature was 310°C, and the outlet temperature was 110°C. ℃. Weigh the mixed powder and lithium salt at a molar ratio of 2:1.06, weigh the mixed powder and lithium carbonate, mix them by ball milling, heat up at a rate of 10°C / min in an oxygen atmosphere, and calcinate at a constant temperature of 800°C for 8 Hours, then cool down to room temperature with the furnace, and LiNi can be prepared after grinding 0.2 mn 1.8 o 4 .

Embodiment 3

[0022] Weigh nickel nitrate and manganese nitrate with Ni:Mn molar ratio of 0.7:1.3, mix and add deionized water to make a 0.8mol / L solution. The obtained solution was dried with a high-speed centrifugal drying sprayer to obtain a mixed powder, and the feed solution speed was 30ml / min; the gas flow rate of the nozzle was controlled by the pressure of compressed air, and the pressure was controlled at 0.4MPa; the air inlet temperature was 310°C, and the outlet temperature was 110°C. ℃. Weigh the mixed powder and lithium salt at a molar ratio of 2:1.06, weigh the mixed powder and lithium sulfate, mix them by ball milling, heat up at a rate of 10°C / min in an oxygen atmosphere, and calcinate at a constant temperature of 850°C for 5 hours, and then directly cool down to room temperature at a rate of 20°C / min, and LiNi can be prepared after grinding 0.2 mn 1.8 o 4 .

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Abstract

The invention discloses a preparation method of nickel lithium manganate anode material LiNixMn2-xO4(x is more than 0 and is less than 1) and belongs to the preparing field of secondary battery materials. The preparing steps are that: nickel-source containing compound and manganese-source containing compound are firstly mixed according to chemometry, and then de-ionized water is added in the raw material mixture, and the solution is spray-dried for preparing the mixed powder; the mixed powder is mixed and sintered with the nickel-source containing compound, thus preparing the lithium ion battery anode material LiNixMn2-xO4(x is more than 0 and is less than 1). The method has simple and convenient process, short preparing time and low producing cost; the prepared product has stable structure, high specific capacity and good electrochemical performance; the method is suitable for large-scale industrial production of the lithium ion battery active material. The mean grain size of the product is 10mum and the initial discharge capacity thereof is 138mAh / g; after 200 times of 1.5C charge-discharge circulation, the capacity attenuation is less than 8 percent.

Description

Technical field: [0001] The invention belongs to the field of secondary battery material preparation and relates to a preparation method of a positive electrode material of a lithium ion power battery. Background technique: [0002] The global oil crisis is becoming more and more serious, and the world's oil reserves are only left for human use for 40 years, and the oil consumption of automobiles is the largest. Moreover, a large amount of harmful gas emitted by automobile fuel has also seriously polluted the living environment of human beings. The rapid development of China's auto industry has an increasing impact on the world's environment and energy. For this reason, the development of electric vehicles and hybrid electric vehicles is one of the main methods to solve future energy shortages and environmental degradation. The new lithium-ion battery belongs to the field of clean energy. It has the advantages of good safety, good cycle performance, long life, non-toxic an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/485
CPCY02E60/12Y02E60/10
Inventor 陈蕴博陈林陈永翀
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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