Method for preparing high-softening point asphalt for coating natural graphite cathode material of lithium-ion battery

A high softening point asphalt and lithium-ion battery technology, which is applied in the chemical processing of tar pitch/petroleum pitch/natural pitch, battery electrodes, circuits, etc., can solve problems such as unmentioned uses, and achieve high discharge capacity, coulomb long-lasting effect

Active Publication Date: 2014-07-02
ZHANJIANG JUXIN NEW ENERGY +1
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

It also prepares isotropic pitch with high softening point, but it is mainly used for spinning, and does not mention its use in coating graphite to prepare lithium-ion battery materials

Method used

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  • Method for preparing high-softening point asphalt for coating natural graphite cathode material of lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Send the medium-temperature bitumen raw material preheated to 100°C into the melting tank, and heat it to 200°C under the condition of vacuum negative pressure of 0.06MPa. The molten asphalt raw material is sent to the primary oxidation tank, and the air oxidant is continuously fed in from the bottom of the oxidation tank by an air compressor. The feed rate of asphalt raw material is 35Kg / h, and the feed rate of air oxidant is 10m 3 / h. Stir and oxidize at 280°C for 8 hours under a negative vacuum pressure of 0.08MPa. The oxidized product of the primary oxidation tank is sent to the secondary oxidation tank, and an air compressor is used to continuously feed the air oxidant from the bottom of the oxidation tank. The feed rate of asphalt raw material is 30Kg / h, and the feed rate of air oxidant is 15m 3 / h. Stir and oxidize at 300°C for 6 hours under a vacuum negative pressure of 0.08MPa. The oxidized product of the secondary oxidation tank is sent to the third oxida...

Embodiment 2

[0067] Send the medium-temperature bitumen raw material preheated to 120°C into the melting tank, and heat it to 220°C under a vacuum negative pressure of 0.06MPa. The molten asphalt raw material is sent to the primary oxidation tank, and the air oxidant is continuously fed in from the bottom of the oxidation tank by an air compressor. The feed rate of asphalt raw material is 55Kg / h, and the feed rate of air oxidant is 40m 3 / h. Stir and oxidize at 300°C for 5 hours under a negative vacuum pressure of 0.07MPa. The oxidized product of the primary oxidation tank is sent to the secondary oxidation tank, and an air compressor is used to continuously feed the air oxidant from the bottom of the oxidation tank. The feed rate of asphalt raw material is 45Kg / h, and the feed rate of air oxidant is 35m 3 / h. Stir and oxidize at 320°C for 6 hours under a vacuum negative pressure of 0.08MPa. The oxidized product of the secondary oxidation tank is sent to the third oxidation tank, and ...

Embodiment 3

[0069] Send the medium-temperature bitumen raw material preheated to 100°C into the melting tank, and heat it to 200°C under the condition of vacuum negative pressure of 0.06MPa. The molten asphalt raw material is sent to the primary oxidation tank, and the air oxidant is continuously fed in from the bottom of the oxidation tank by an air compressor. The feed rate of asphalt raw material is 45Kg / h, and the feed rate of air oxidant is 30m 3 / h. Stir and oxidize at 290°C for 5 hours under a negative vacuum pressure of 0.07MPa. The oxidized product of the primary oxidation tank is sent to the secondary oxidation tank, and an air compressor is used to continuously feed the air oxidant from the bottom of the oxidation tank. The feed rate of asphalt raw material is 35Kg / h, and the feed rate of air oxidizer is 28m 3 / h. Stir and oxidize at 310°C for 6 hours under a negative vacuum pressure of 0.06MPa. The oxidized product of the secondary oxidation tank is sent to the third oxida...

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Abstract

The invention relates to a method for preparing an isotropous high-softening point asphalt. The method comprises the following steps: (1) oxidizing an asphalt raw material in at least two stages under vacuum negative pressure at a temperature which is higher than an asphalt melting temperature and lower than or equal to 335 DEG C; (2) oxidizing the asphalt obtained in the step (1) under vacuum negative pressure at 340-350 DEG C. The invention also relates to the isotropous high-softening point asphalt obtained by the method, use of the isotropous high-softening point asphalt in preparation of a cathode material of a lithium-ion battery and a method for preparing a carbon cathode material of the lithium-ion battery by use of the isotropous high-softening point asphalt.

Description

Technical field: [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing isotropic pitch with high softening point, the isotropic pitch with high softening point prepared by the method, and the isotropic pitch with high softening point Use in preparing lithium ion battery carbon negative electrode materials and a method for preparing lithium ion battery carbon negative electrode materials using the high softening point isotropic pitch. Background technique: [0002] Lithium-ion batteries have become a new generation of secondary batteries since the 1990s after nickel-metal hydride batteries because of their advantages such as high operating voltage, high energy density, long cycle life, small self-discharge, and no memory effect. In the development process of lithium-ion battery technology, the quality of batteries has been continuously improved, and the production cost has been continuously reduced. Anode materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/04H01M4/36H01M4/139
CPCY02E60/122Y02E60/10
Inventor 吴其修刘明东李佳坤郭庆
Owner ZHANJIANG JUXIN NEW ENERGY
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