Production method of lithium battery high-performance electrode material

An electrode material and manufacturing method technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of battery gas swelling, easy gelling of the slurry, poor processing performance, etc., to reduce carbon content, good repeatability, The effect of improving processability

Inactive Publication Date: 2015-06-24
于桂菊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-based multi-component materials, especially materials with high nickel content and lithium titanate anode materials, have the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for manufacturing a high-performance electrode material for a lithium battery, comprising the steps of:

[0020] (1) Multi-element precursor: According to the molar ratio of lithium, iron, and phosphorus elements of 4:1:1, lithium chloride, ferrous chloride, and phosphorus source compound are uniformly mixed with ammonium dihydrogen phosphate to obtain a mixture, and the mass of the mixture is added 0.02% boric acid and 0.06% glucose and citric acid are composed of an organic carbon source according to a weight ratio of 3:2 to obtain a precursor of a surface-coated carbon layer;

[0021] (2) Manufacture of pore agent sol: put ethanol in the container, turn on the thermostat, set the temperature at 50°C, control the speed at 50rpm, keep stirring for 15min, and mix the prepared multi-element precursor and ethanol according to the mass ratio of 1: 3 Dissolve in ethanol to form a sol, and add ammonia water to adjust the pH=4-5;

[0022] (3) Carbonization: After th...

Embodiment 2

[0025] A method for manufacturing a high-performance electrode material for a lithium battery, comprising the steps of:

[0026] (1) Multi-element precursor: According to the molar ratio of lithium, iron, and phosphorus elements 4:1:3, lithium chloride, ferrous chloride, and phosphorus source compound are uniformly mixed with diammonium hydrogen phosphate to obtain a mixture, and the mass of the mixture is added 0.03% boric acid and 0.08% glucose and citric acid are composed of an organic carbon source according to a weight ratio of 3:2 to obtain a precursor of a surface-coated carbon layer;

[0027] (2) Manufacture of pore agent sol: put ethanol in the container, turn on the thermostat, set the temperature at 50°C, control the speed at 60rpm, keep stirring for 10min, and mix the prepared multi-element precursor and ethanol at a mass ratio of 1: 3 Dissolve in ethanol to form a sol, and add ammonia water to adjust the pH=4-5;

[0028] (3) Carbonization: After the above sol eva...

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PUM

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Abstract

The invention discloses a production method of a lithium battery high-performance electrode material. The production method is characterized by comprising the following steps: (1) preparing a multi-element precursor; (2) manufacturing pore-forming agent sol; (3) carrying out carbonization; (4) washing the electrode preparation material. The raw materials used in the method are relatively low in price; by adding boric acid, the specific capacitance of the electrode material is improved, the repeatability is good, the uniformity of a carbon cladding layer in a lithium iron phosphate material can be improved, the conductivity is guaranteed, the carbon amount is reduced, the carbon utilization rate in the lithium iron phosphate material is increased, the specific surface area of the material is reduced, the machining performance of the material is improved, the method is simple, the cycle life of the electrode is relatively long, and easiness in industrialization can be realized.

Description

technical field [0001] The invention belongs to the technical field of electrode material production, and in particular relates to a method for producing a high-performance electrode material for a lithium battery. Background technique [0002] A lithium-ion battery is a secondary battery system in which two different lithium intercalation compounds that can reversibly insert and extract lithium ions are used as the positive electrode and the negative electrode of the battery, respectively. When charging, lithium ions are extracted from the lattice of the positive electrode material, and inserted into the lattice of the negative electrode material after passing through the electrolyte, making the negative electrode rich in lithium and the positive electrode poor in lithium; during discharge, lithium ions are extracted from the lattice of the negative electrode material, and after The electrolyte is then inserted into the lattice of the positive electrode material, making the...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M4/1397
CPCY02E60/10
Inventor 于桂菊
Owner 于桂菊
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