Chromium oxide/carbon fluoride/high conductive material composite material for lithium primary battery

A chromium oxide, high conductivity technology, used in battery electrodes, active material electrodes, non-aqueous electrolyte batteries, etc., can solve problems such as chromium oxide sensitivity, uneven coating of composite materials, and limited improvement in material conductivity. , to achieve the effect of improving conductivity, improving discharge specific capacity and rate performance

Active Publication Date: 2022-07-19
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is extremely difficult to chemically combine chromium oxide and graphene, and simple physical mixing has limited effect on improving the conductivity of the material, and chromium oxide is extremely sensitive to solvents, especially in high temperature and high pressure environments, it is very easy to generate chromic anhydride ( h 2 CrO 4 ), so it is very difficult to prepare chromium oxide / graphene composites by hydrothermal method
[0008] All in all, the current research direction is focused on improving the conductivity of chromium oxides, but most researchers use prepared chromium oxides (such as Cr 8 o 21 、Cr 2 o 5 etc.) to doping or coating, the obtained composite material has problems such as uneven coating, and the discharge effect is not satisfactory

Method used

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  • Chromium oxide/carbon fluoride/high conductive material composite material for lithium primary battery
  • Chromium oxide/carbon fluoride/high conductive material composite material for lithium primary battery
  • Chromium oxide/carbon fluoride/high conductive material composite material for lithium primary battery

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Embodiment 1

[0039] A kind of Cr for lithium primary battery 8 O 21 The preparation method of carbon fluoride / graphene composite material, comprising the following steps:

[0040] ① Preparation of doping material: after mixing carbon fluoride, graphene and water, ultrasonically dispersing for 30 minutes, and then drying until the water is completely removed, that is, a uniformly mixed doping material is obtained;

[0041] ②According to CrO 3 : The mass ratio of carbon fluoride:graphene=80:15:5, the chromium trioxide and the doping material are ball-milled for 6h under the condition of rotating speed 300r / min, so that the material is uniformly dispersed;

[0042] ③Place the product obtained in step ② in a tube furnace, sinter it with oxygen at 270°C for 48h, take it out and grind it into powder, pass through a 200-mesh sieve, and obtain Cr 8 O 21 / carbon fluoride / graphene composite material; the oxygen flow rate is 25ml / min;

[0043] ④ The composite material, SuperP, CNTS, and PVDF ...

Embodiment 2

[0046] A kind of Cr for lithium primary battery 8 O 21 The preparation method of carbon fluoride / graphene composite material, comprising the following steps:

[0047] ① Preparation of doping material: after mixing carbon fluoride, graphene and water, ultrasonically dispersing for 30 minutes, and then drying until the water is completely removed, that is, a uniformly mixed doping material is obtained;

[0048] ②According to CrO 3 : The mass ratio of carbon fluoride: graphene = 85:10:5, the chromium trioxide and the doping material are ball-milled for 6h under the condition of rotating speed 300r / min, so that the material is uniformly dispersed;

[0049] ③Place the product obtained in step ② in a tube furnace, sinter it with oxygen at 270°C for 48h, take it out and grind it into powder, pass through a 200-mesh sieve, and obtain Cr 8 O 21 / Fluorocarbon / graphene composite material; the oxygen flow rate is 25ml / min.

Embodiment 3

[0051] A kind of Cr for lithium primary battery 8 O 21 The preparation method of carbon fluoride / graphene composite material, comprising the following steps:

[0052] ① Preparation of doping material: after mixing carbon fluoride, graphene and water, ultrasonically dispersing for 30 minutes, and then drying until the water is completely removed, that is, a uniformly mixed doping material is obtained;

[0053] ②According to CrO 3 : The mass ratio of carbon fluoride:graphene=75:20:5, the chromium trioxide and the doping material are ball-milled for 6h under the condition of rotating speed 300r / min, so that the material is uniformly dispersed;

[0054] ③Place the product obtained in step ② in a tube furnace, sinter it with oxygen at 270°C for 48h, take it out and grind it into powder, pass through a 200-mesh sieve, and obtain Cr 8 O 21 / Fluorocarbon / graphene composite material; the oxygen flow rate is 25ml / min.

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Abstract

The invention belongs to the technical field of electrode material production, and in particular relates to a composite material of chromium oxide / carbon fluoride / highly conductive substance for lithium primary batteries. The premix of the active substance is the doping material, and the reaction raw material and the doping material are sequentially ball-milled and sintered with oxygen; the present invention selects carbon fluoride and high-conductivity substances as the doping material, and uses chromium trioxide as the preparation of chromium The raw material of oxide, the doping material is introduced in the whole process of chromium oxide formation, so that CrO 3 While undergoing liquefaction and decomposition reaction process at high temperature, carbon fluoride and highly conductive substances can be uniformly doped on the surface of chromium oxide or embedded in the interior, which effectively improves the first discharge specific capacity and rate performance of chromium oxide.

Description

technical field [0001] The invention belongs to the technical field of electrode material production, and particularly relates to a chromium oxide / carbon fluoride / high-conductive substance composite material for lithium primary batteries. Background technique [0002] As small electronic devices and military equipment put forward higher requirements on the specific energy of lithium batteries, metal lithium batteries with high specific energy characteristics have become a research hotspot. Lithium primary batteries (lithium primary batteries) are favored by researchers due to a series of advantages such as high operating voltage, high specific energy, and long storage life. The key to the performance of lithium primary batteries is the selection of positive electrode materials. Carbon fluoride, manganese dioxide, sulfur dioxide, thionyl chloride, etc. are the commercialized lithium primary battery positive electrode materials. However, due to the limitation of the lithium p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M4/62H01M6/14
CPCH01M4/483H01M4/625H01M4/364H01M4/5835H01M6/14H01M2004/028
Inventor 滕久康王畅王庆杰张亮张红梅陈晓涛石斌
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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