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Anode material--lithium nickelate cobalt preparation method for lithium ion battery

A technology for lithium-ion batteries and cathode materials, applied in electrode manufacturing, battery electrodes, active material electrodes, etc., can solve the problem that the hydrothermal method is not suitable for large-scale industrial production, it is difficult to adjust the particle size distribution of products, and it is difficult to obtain ion precursors, etc. problems, achieve excellent layered structure, ensure electrochemical performance, and reduce costs

Inactive Publication Date: 2006-05-10
ZHEJIANG NARADA POWER SOURCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the co-precipitation method, since the precipitation of the transition metal salt and the lithium salt are separated, it is difficult to obtain a precursor with uniform ion mixing, which ultimately affects the quality of the product; the hydrothermal method is not suitable for large-scale industrial production; the sol-gel method requires Consuming a large amount of organic acid, this method is not easy to adjust the particle size distribution of the product; the spray drying method also has the defects of the co-precipitation method; although the emulsion method can conveniently control the particle size distribution of the final product, it will generate a large amount of organic waste gas, which is not easy industrialization

Method used

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  • Anode material--lithium nickelate cobalt preparation method for lithium ion battery
  • Anode material--lithium nickelate cobalt preparation method for lithium ion battery
  • Anode material--lithium nickelate cobalt preparation method for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 405.3g Li 2 SO 4 , 108.7g CoSO 4 , 411.24g NiSO 4 1. Dissolve 135g of tartaric acid in 1L of water, add an appropriate amount of gelatin into the solution, raise the temperature to 45°C, and continue adding gelatin until the viscosity of the solution reaches 200-400mPa.sec. Keep the temperature at 45°C for 30 minutes with slight stirring. Turn on the spray drying device, adjust the rotational speed of the centrifugal atomizer to 14-16m / s, start spray drying, collect the obtained precursor, and perform solid-phase sintering according to the following program control method, the first stage: 350°C, 2h; the second Stage: 400℃~500℃~600℃, 2~2~2h; the third stage: 800℃, 10h~12h, the whole process adopts oxygen atmosphere.

Embodiment 2

[0041] Take 243.17g CH3 COOLi, 110.15g (CH 3 COO) 2 Co, 496g (CH 3 COO) 2 Dissolve Ni and 172.8g citric acid in 1L water, add an appropriate amount of gelatin into the solution, raise the temperature to 45°C, and continue adding gelatin until the solution viscosity reaches 200-400mPa.sec. Keep the temperature at 45°C for 30 minutes with slight stirring. Turn on the spray drying device, adjust the rotational speed of the centrifugal atomizer to 16-18m / s, start spray drying, collect the obtained precursor, and perform solid-phase sintering according to the following programmed method, the first stage: 380°C, 1.5h; The second stage: 400~500~600°C, 2h~2h~2h; the third stage: 800°C, 10~12h, the whole process adopts oxygen atmosphere.

Embodiment 3

[0043] Take 243.17g CH 3 COOLi, 90.5g (CH 3 COO) 2 Co, 506g (CH 3 COO) 2 Ni,, 135g of tartaric acid in 1L of water, add an appropriate amount of gelatin to the solution, raise the temperature to 45°C, continue to add gelatin until the solution viscosity reaches 200-400mPa.sec. Keep the temperature at 45°C for 30 minutes with slight stirring. Turn on the spray drying device, adjust the rotational speed of the centrifugal atomizer to 16-18m / s, start spray drying, collect the obtained precursor, and carry out solid-phase sintering according to the following program control method, the first stage: 300°C, 1.5h; The second stage: 400~500~600°C, 2h~2h~2h; the third stage: 850°C, 10~12h, the whole process adopts oxygen atmosphere.

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Abstract

The invention is a method of preparing lithium ion cell anode material-nickel cobalt acid lithium, and its characteristic: in the proportion of its formula, A-group matters: water-soluble lithium salt which is one of the lithium chloride, lithium sulphate, lithium nitrate and lithium acetate, water cobalt salt which is one of the cobalt chloride, cobalt sulphate, cobalt nitrate and cobalt acetate, and water nickel salt which is one of the nickel chloride, nickel sulphate, nickel nitrate and nickel acetate, the molar ratio of the three matters is 1.00-1.1 : 0.2-0.3 : 0.8-0.7; B-group matters: complexant is one of the oxalic acid, tartaric acid, citric acid, succinic acid, malonic acid, and maleic acid; the molar ratio of A to B is 1.0 : 0.6 -0.8; C-group polymers: gelatin, modified starch and polyvinyl alcohol. The beneficial effects: it can effectively reduce cost and the made LiNi1-yCoyO2 has the advantages of both LiCoO2 and LiNiO2, i.e. easy to synthesize, stable-property, high-specific capacity (higher than that of LiCoO2 by above 20%), etc. Additionally, because the use of Co is reduced, thus it reduces the environmental pollution. Therefore, LiNi1-yCoyO2 has a great hope of becoming the preferred substitute for LiCoO2, and its market demand is quite considerable.

Description

1. Technical field: [0001] The invention relates to a battery material, and in particular discloses lithium nickel cobalt oxide, a cathode material for a lithium ion battery, and a preparation method thereof, which is an energy source for electronic products and a battery that can be recharged and discharged twice. 2. Background technology: [0002] The active cathode material currently used in large-scale production of lithium-ion batteries is lithium cobalt oxide LiCoO 2 However, due to the lack of Co resources (the world's proven recoverable cobalt reserves are about 1 / 15 of nickel) and high prices (the price of Co is 5 times that of Ni), it is not conducive to the promotion and application of lithium-ion batteries. Therefore, people are devoting themselves to the research and development of a new generation of cathode materials. [0003] Currently preparing LiNi 1-y co y o 2 The methods are generally divided into two categories: 1. Solid state high temperature sinter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/58H01M4/04C01D15/00H01M4/02H01M4/52
CPCC01G51/42C01G53/42C01P2002/52C01P2002/54C01P2002/72C01P2002/74C01P2004/51C01P2004/52C01P2004/61C01P2006/40H01M4/1391H01M4/525Y02E60/10
Inventor 王路任智张小聪丁祥欢王众高蕾田波义
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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