Chromium oxide/carbon fluoride/high-conductivity substance composite material for lithium primary battery

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

Active Publication Date: 2021-11-12
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-conductivity substance composite material for lithium primary battery
  • Chromium oxide/carbon fluoride/high-conductivity substance composite material for lithium primary battery
  • Chromium oxide/carbon fluoride/high-conductivity substance composite material for lithium primary battery

Examples

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Effect test

Embodiment 1

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

[0040] ①Preparation of doping materials: After mixing fluorinated carbon, graphene and water, ultrasonically disperse for 30 minutes, and then dry until the water is completely removed, and a uniformly mixed doping material is obtained;

[0041] ② According to CrO 3 : carbon fluoride: graphene=80:15:5 mass ratio, ball milling chromium trioxide and dopant material for 6 hours under the condition of rotating speed 300r / min, so that the material is evenly dispersed;

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

[0043] ④ Mix the composite material, SuperP, CNTS, and PVDF (solution with a mass fraction...

Embodiment 2

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

[0047] ①Preparation of doping materials: After mixing fluorinated carbon, graphene and water, ultrasonically disperse for 30 minutes, and then dry until the water is completely removed, and a uniformly mixed doping material is obtained;

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

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

Embodiment 3

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

[0052] ①Preparation of doping materials: After mixing fluorinated carbon, graphene and water, ultrasonically disperse for 30 minutes, and then dry until the water is completely removed, and a uniformly mixed doping material is obtained;

[0053] ② According to CrO 3 : carbon fluoride: graphene=75:20:5 mass ratio, ball milling chromium trioxide and dopant material for 6 hours under the condition of rotating speed 300r / min, so that the material is evenly dispersed;

[0054] ③ Place the product obtained in step ② in a tube furnace, sinter it with oxygen at 270°C for 48 hours, take it out and grind it into powder, pass through a 200-mesh sieve to 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 manufacturing, and particularly relates to a chromium oxide / carbon fluoride / high-conductivity substance composite material for a lithium primary battery. the electrode material is prepared by taking chromium trioxide as a reaction raw material and carbon fluoride and a high-conductivity substance premix as a doping material, and sequentially carrying out ball milling and oxygen introduction sintering on the reaction raw material and the doping material; AND carbon fluoride and a high-conductivity substance are selected as doping materials, chromium trioxide is taken as a raw material for preparing chromium oxide, and the doping materials are introduced in the whole process of forming the chromium oxide, so that the carbon fluoride and the high-conductivity substance can be uniformly doped on the surface of the chromium oxide or embedded into the chromium oxide while CrO3 is subjected to liquefaction and decomposition reaction at high temperature, and the first discharge specific capacity and the rate capability of the chromium oxide are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of electrode material production, and in particular relates to a chromium oxide / carbon fluoride / high conductivity material 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 working voltage, high specific energy, and long storage life. The key to the performance of lithium primary batteries lies in the selection of positive electrode materials. Carbon fluoride, manganese dioxide, sulfur dioxide, and thionyl chloride are commercial lithium primary battery positive electrode materials. However, limited by the limitations of the lithium p...

Claims

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Application Information

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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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