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Composite carbon fluoride cathode material for lithium primary battery, preparation method and application thereof

A composite fluorocarbon and positive electrode material technology, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of low material tap density, low volume specific energy, etc., and achieve easy scale-up production, simple preparation method, The effect of increasing the discharge voltage

Active Publication Date: 2019-03-12
SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] New fluorinated carbon materials such as fluorinated carbon nanotubes and fluorinated graphene have higher discharge platform and mass specific energy, but due to the low tap density of the material itself, its volume specific energy is low.

Method used

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  • Composite carbon fluoride cathode material for lithium primary battery, preparation method and application thereof
  • Composite carbon fluoride cathode material for lithium primary battery, preparation method and application thereof
  • Composite carbon fluoride cathode material for lithium primary battery, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Select activated carbon (purity ≥ 99.5%, D 50 ≤ 50µm) 200g into the reaction furnace, heated up to 350°C, passed into F 2 Volume fraction 2% F 2 / N 2The mixed gas was reacted for 12 hours to obtain fluorinated activated carbon, the F / C of which was tested was 0.76, and the tap density was 0.82g / ml.

[0046] Select 200g of carbon fiber (200 mesh) and put it into the reaction furnace, raise the temperature to 100°C, and pass it into F 2 F with a volume fraction of 100% 2 After 24 hours of reaction, fluorinated carbon fiber was obtained, and its F / C was 0.92, and its tap density was 0.94g / ml.

[0047] Put the obtained fluorinated activated carbon and fluorinated carbon fiber into a ball mill jar at a mass ratio of 1:10, and ball mill for 12 hours to obtain a composite fluorinated carbon material, and then mix the mixed fluorinated carbon material with fluorine nitrogen at a concentration of 1% fluorine gas Mixed gas, secondary fluorination treatment at 500°C for 5 hou...

Embodiment 2

[0049] Select activated carbon (purity ≥ 99.5%, D 50 ≤ 50µm) 200g into the reaction furnace, heated up to 250°C, 2 Volume fraction 10% F 2 / N 2 The mixed gas was reacted for 6 hours to obtain fluorinated activated carbon; after testing, its F / C was 0.74 and its tap density was 0.81g / ml.

[0050] Select 200g of carbon fiber (200 mesh) and put it into the reaction furnace, raise the temperature to 400°C, and pass it into F 2 Volume fraction 10% F 2 / N 2 The mixed gas was reacted for 16 hours to obtain fluorinated carbon fibers, the F / C of which was tested was 0.95, and the tap density was 0.96g / ml.

[0051] The obtained fluorinated activated carbon and fluorinated carbon fiber are put into a ball mill jar according to the mass ratio of 1:1, and ball milled for 6 hours to obtain a composite fluorinated carbon material, and then the mixed fluorinated carbon material is mixed with fluorine nitrogen at a concentration of 5% fluorine gas. Mixed gas, secondary fluoridation treat...

Embodiment 3

[0053] Select activated carbon (purity ≥ 99.5%, D 50 ≤ 50µm) 200g into the reaction furnace, heated up to 100°C, 2 F with a volume fraction of 100% 2 After 2 hours of reaction, fluorinated activated carbon was obtained; the F / C was 0.80 and the tap density was 0.85g / ml after testing.

[0054] Select 200g of carbon fiber (200 mesh) and put it into the reaction furnace, raise the temperature to 600°C, and pass it into F 2 Volume fraction 2% F 2 / N 2 The mixed gas was reacted for 4 hours to obtain fluorinated carbon fibers, the F / C of which was tested was 0.96, and the tap density was 0.98g / ml.

[0055] The obtained fluorinated activated carbon and fluorinated carbon fiber are put into a ball mill jar according to the mass ratio of 1:0.1, and ball milled for 0.5h to obtain a mixed fluorinated carbon material. The secondary fluorination treatment was carried out for 1 hour under the condition of ℃, and the secondary fluorination mixed carbon fluoride positive electrode materi...

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Abstract

The invention belongs to the technical field of a cathode material for a lithium primary battery, particularly relates to the field of preparation of the cathode material for a fluorocarbon battery, and in particular to a composite carbon fluoride cathode material for the lithium primary battery, a preparation method and an application thereof. The material is a composite material prepared by ballmilling and mixing a porous carbon fluoride material having a high tap density and a carbon fluoride material having a high graphitization degree and then fluorinating the mixture. The composite material has a carbon content of 38-60%, a fluorine content of 40-62% and a tap density of greater than 0.8g / ml; the mixing mass ratio is in the range of 1:0.1-1:10; and the composite material has high specific surface area, high tap density and high graphitization degree. Due to the high tap density of the material, the overall high volumetric specific energy of the material is guaranteed; through anion diffusion channel composed of porous carbon fluorides, the voltage hysteresis phenomenon at the initial stage of the battery discharge is effectively improved and the overall discharge performance of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium primary batteries, in particular to the field of preparation of positive electrode materials for fluorocarbon batteries, in particular to a composite carbon fluoride positive electrode material for lithium primary batteries and its preparation method and application. Background technique [0002] Lithium primary batteries still play an irreplaceable role in aerospace, medical equipment, military equipment and daily life. Among them, lithium / carbon fluoride batteries are currently the lithium primary batteries with the highest theoretical specific energy, and the theoretical mass specific energy can reach 2180Wh / kg (lithium / thionyl chloride battery: 1470 Wh / Kg, lithium / manganese dioxide battery: 1005 Wh / Kg), so lithium / carbon fluoride batteries have received great attention. Its good high and low temperature performance (-40°C-170°C), storage life of more than 10 y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M6/14
CPCH01M4/362H01M4/582H01M4/62H01M6/14
Inventor 方治文杨敏刘超郭飞飞吕黎赵娜崔丽亚
Owner SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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