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Lithium-bearing composite nano carbon tube-graphite material and its preparing process

A carbon nanotube and graphite technology, applied in the field of chemistry, can solve the problems of difficulty in making dense battery electrodes, high cost, etc., and achieve the effects of improving compatibility and kinetic performance, high cost performance, and increased lithium insertion capacity.

Inactive Publication Date: 2004-10-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if carbon nanotubes are directly used as anode materials, the cost is high, and the carbon nanotubes are like cotton wool, making it difficult to make dense battery electrodes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 (based on 100kg microcrystalline graphite)

[0023] 1. Optional epoxy resin: E-44 epoxy resin, dosage 8.6kg;

[0024] 2. The dilution method and diluent are optional: ethyl acetate is used as the diluent, and the dosage is 8.6kg;

[0025] Epoxy resin and diluent were stirred together for 15 minutes;

[0026] 3. Optional carbon nanotube treatment process and equipment:

[0027] - dosage 0.1kg;

[0028] ——Hollow curly irregular carbon nanotubes generated by cracking methane with a Ni-based catalyst at 450°C, with a diameter of 10-25nm, acid-washed and dried;

[0029] - Pretreating the obtained carbon nanotube high-frequency vibration mill for 6 minutes;

[0030] —— After mixing carbon nanotubes and epoxy resin, use 35±5Kh ultrasonic vibration for 5min for later use;

[0031] 4. Graphite is optional: purity 99%, D 50 = 38 microns;

[0032] 5. Optional coating process and equipment:

[0033] - Mix and stir the pre-treated graphite and epoxy resin contai...

Embodiment 2

[0038] Embodiment 2 (in terms of 100kg microcrystalline graphite)

[0039] 1. Optional epoxy resin: E-53 epoxy resin, dosage 16kg;

[0040] 2. Dilution method and diluent are optional: ethyl acetate is used as diluent, the dosage is 16kg; epoxy resin and diluent are stirred together for 15min;

[0041] 3. Optional carbon nanotube treatment process and equipment:

[0042] ——Amount of 0.6kg;

[0043] - all the other are the same as embodiment 1

Embodiment 3

[0044] Embodiment 3 (in terms of 100kg microcrystalline graphite)

[0045] 1. Optional epoxy resin: E-50 epoxy resin, dosage 12kg;

[0046] 2. Dilution method and diluent are optional: ethyl acetate is used as diluent, the dosage is 12kg; epoxy resin and diluent are stirred together for 15 minutes;

[0047] 3. Optional carbon nanotube treatment process and equipment:

[0048] ——Amount of 0.33kg;

[0049] - all the other are the same as embodiment 1

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Abstract

A lithium bearing composite nano-carbon tube-graphite material is prepared through adding nano carbon tubes to epoxy resin, mixing with micron-class graphite particles, controlled carbonizing and graphitizing. It has high lithium capacity.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a carbon nanotube-graphite composite lithium storage material for secondary batteries, and also relates to a preparation method for the carbon nanotube-graphite composite lithium storage material. Background technique [0002] Lithium-ion battery is currently a mainstream secondary battery, which has the advantages of high specific energy and no memory effect. Due to the high capacity of graphite to deintercalate lithium and its flat and low voltage characteristics relative to metal lithium, lithium-ion batteries currently mainly use graphite intercalation compounds as negative electrode materials. However, the graphite layers are maintained by van der Waals force, and the binding force is weak. Under the condition of high current charge and discharge, the impact of strong ion current will easily make the layers slip. This structural stability problem restricts the performance of lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04H01M4/38H01M4/62
CPCY02E60/12Y02E60/10
Inventor 胡小芳
Owner SOUTH CHINA UNIV OF TECH