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Method for processing an electrode material, processed electrode material and lithium-ion battery

A lithium-ion battery and electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve good rate performance, meet the requirements of rapid charge and discharge, and improve conductivity.

Active Publication Date: 2019-07-12
SHANGHAI LIANGFU NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a processing method for electrode materials in order to overcome the defect that there is no very effective, low-cost, and high-safety method that can greatly improve the conductivity of electrode materials in the prior art And processed electrode materials, lithium-ion batteries

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  • Method for processing an electrode material, processed electrode material and lithium-ion battery
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  • Method for processing an electrode material, processed electrode material and lithium-ion battery

Examples

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Effect test

Embodiment 1

[0063] (1) Preparation of LiFePO by ferrous oxalate method 4

[0064] Ferrous oxalate, ammonium dihydrogen phosphate, and lithium carbonate are mixed in a mass ratio of 1:1:1, dried, put into a high-temperature furnace, and calcined in a nitrogen atmosphere to obtain lithium iron phosphate material.

[0065] (2) Cathode material LiFePO 4 processing method

[0066] Stir the mixed solution of cyclohexanone and methanol with a molar ratio of 1:1 at 30° C. for 0.5 h to obtain a carbon source solution;

[0067] The resulting carbon source solution was added with a zinc oxide catalyst at 450°C and reacted for 0.5 hours to obtain carbon source gas;

[0068] 1kg of the lithium iron phosphate material obtained in step (1) is placed in a high-temperature furnace with a volume of 20L, nitrogen gas is introduced, and then carbon source gas is introduced, and the quality of the carbon source gas accounts for 5% of the mass of the lithium iron phosphate material , at 700°C, decompose to...

Embodiment 2

[0074] (1) Preparation of LiFePO by carbothermal reduction method 4

[0075] Iron phosphate and lithium carbonate are mixed at a mass ratio of 1:1.03, dried, placed in a high-temperature furnace, and calcined in a nitrogen atmosphere to obtain lithium iron phosphate material.

[0076] (2) Cathode material LiFePO 4 processing method

[0077] Stir the mixed solution of calcium formate and ethanol with a molar ratio of 1:1 at 35°C for 0.75h to obtain a carbon source solution;

[0078] The obtained carbon source solution was added with a tin oxide catalyst at 480°C, and reacted for 1 hour to obtain carbon source gas;

[0079] 1 kg of the lithium iron phosphate material obtained in step (1) is placed in a high-temperature furnace with a volume of 20 L, nitrogen gas is introduced, and then carbon source gas is introduced, and the quality of the carbon source gas accounts for 8% of the mass of the lithium iron phosphate material , at 800°C, pyrolyze to obtain unsaturated carbon s...

Embodiment 3

[0085] (1) Preparation of LiFePO by ferrous oxalate method 4 / C

[0086] Ferrous oxalate, ammonium dihydrogen phosphate, lithium carbonate, and carbon source are mixed and dried in a mass ratio of 1:1:1:1, put into a high-temperature furnace, and calcined in a nitrogen atmosphere to obtain carbon-coated phosphorous acid lithium iron material.

[0087] (2) Cathode material LiFePO 4 processing method

[0088] Stir the mixed solution of benzoquinone and toluene with a molar ratio of 1:1 at 65°C for 1 hour to obtain a carbon source solution;

[0089] Add the obtained carbon source solution at 550°C to a tin dioxide catalyst and react for 1 hour to obtain carbon source gas;

[0090] 1.2 kg of the carbon-coated lithium iron phosphate material obtained in step (1) is placed in a high-temperature furnace with a volume of 20 L, and nitrogen gas is introduced, and then carbon source gas is introduced. 6% of the mass of ferrous lithium material is cracked at 700°C to obtain unsatura...

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Abstract

The invention discloses a method for processing an electrode material, a processed electrode material and a lithium-ion battery. The method comprises the step that the electrode material is calcined in an inert atmosphere and an unsaturated carbon source gas, wherein the electrode material is an electrode material containing a transition metal element, an electrode material containing a silicon element or an electrode material containing a sulfur element. According to the electrode material obtained by the processing method of the present invention, the electrical conductivity is greatly improved, and a prepared battery has excellent rate performance.

Description

technical field [0001] The invention relates to a processing method of an electrode material, a processed electrode material and a lithium ion battery. Background technique [0002] In recent decades, people around the world have actively developed lithium-ion power battery materials for use in transportation tools, such as electric vehicles and electric bicycles. [0003] The positive electrode materials for lithium-ion batteries mainly include lithium cobaltate positive electrode materials, lithium nickelate positive electrode materials, lithium manganese oxide positive electrode materials, and lithium iron phosphate positive electrode materials. Lithium cobalt oxide cathode material has stable electrochemical performance, good cycle performance, and excellent charge and discharge performance. It is the first lithium-ion battery cathode material commonly used, but the poor safety of lithium cobalt oxide limits the use of cobalt-based lithium-ion batteries. , especially in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/58H01M4/62H01M10/0525
CPCH01M4/139H01M4/5825H01M4/625H01M10/0525Y02E60/10
Inventor 不公告发明人
Owner SHANGHAI LIANGFU NEW ENERGY TECH CO LTD
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