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Preparation method of anode material of Al2O3-cladding manganese-based laminated lithium battery

A technology for positive electrode materials and lithium batteries, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of not meeting the requirements of large-capacity lithium batteries, puncture of positive electrode materials, large charge and discharge current, etc., and achieve cost reduction and expansion and better protection against material punctures, better performance

Inactive Publication Date: 2010-07-14
JIANGSU KING LITHIUM CELL
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Problems solved by technology

Lithium iron phosphate, as the cathode material of lithium batteries, has good safety, but its energy is relatively poor, which cannot meet the requirements of large-capacity lithium batteries; lithium cobalt oxide, as the cathode material of lithium batteries, has a high energy ratio, but due to the cobalt The chemical properties of the element are active, and the charge and discharge current is too large during its use, which may easily cause changes in the internal material structure and cause puncture of the positive electrode material, resulting in short circuit and explosion, so its safety is poor

Method used

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Embodiment Construction

[0015] The cathode material of the present invention is obtained through the steps of the following examples:

[0016] One, (Ni 0.166 co 0.166 mn 0.688 )(OH) 2 Preparation of precursor particles.

[0017] 1). NiSO4, CoSO4, MnSO4 are made into aqueous solution in molar ratio, positive ion molar concentration ratio Ni: Co: Mn=0.133: 0.133: 0.534, the final concentration sum of all positive ions is 2.0 mole / liter.

[0018] 2). Make NaOH into 2.0 mol / L aqueous solution

[0019] 3). Prepare ammonia water (NH 4 Oh)

[0020] 4). Take 2.0 liters of the prepared metal ion solution and put it into a stirred reactor in a nitrogen atmosphere. The stirring speed of the stirrer is 1000 rpm, and the temperature is controlled at 60° C. after heating.

[0021] 5). A total amount of 4.2 liters of NaOH solution with a concentration of 2.0 mol / liter is slowly dropped into the stirrer to generate (Ni 0.166 co 0.166 mn 0.688 )(OH) 2 For the precipitation of particles, the whole dripping ...

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Abstract

The invention relates to preparation of an anode material of a lithium battery, in particular to a preparation method of the anode material of an Al2O3-cladding manganese-based laminated lithium battery. The preparation method comprises the following steps of: preparing (Ni0.166Co0.166Mn0.688)(OH)2 precursor particles; preparing Li(Li0.20Ni0.133Co0.534)O2 with a laminated crystal structure by a high-temperature solid phase method; and enhancing the performance of a Li(Li0.20Ni0.133Co0.534)O2 particle product by Al2O3 cladding. The invention has the advantages of larger energy ratio of the product thereof than lithium cobaltoxide, low cost, good safety when the product is used as the anode material, long service life of the product, and higher charging / discharging specific capacity and cycle life as well as better safety of the particles of the Al2O3-cladding manganese-based laminated crystal structure.

Description

technical field [0001] The present invention relates to the preparation of the cathode material of lithium battery, specifically a kind of Al 2 o 3 The invention discloses a preparation method of a manganese-based layered crystal lithium battery cathode material. Background technique [0002] Existing lithium batteries, the positive electrode materials mainly include lithium iron phosphate, lithium cobalt oxide and the like. Lithium iron phosphate, as the cathode material of lithium batteries, has good safety, but its energy is relatively poor, which cannot meet the requirements of large-capacity lithium batteries; lithium cobalt oxide, as the cathode material of lithium batteries, has a high energy ratio, but due to the cobalt The chemical properties of elements are active, and the charge and discharge current is too large during use, which may easily cause changes in the internal material structure and cause puncture of the positive electrode material, resulting in short...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 崔立峰徐友龙李溪
Owner JIANGSU KING LITHIUM CELL
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