Thermal battery composite positive electrode material and preparation method thereof

A composite positive electrode material and a technology of positive electrode materials, which are applied in the field of thermal battery composite positive electrode materials and their preparation, can solve the problems of uneven mixing of positive electrode materials and conductive agents, low conductivity of thermal battery positive electrode materials, etc., and achieve easy acquisition and improved discharge The effect of performance, broad application prospects

Pending Publication Date: 2021-07-16
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the invention is that the existing positive electrode material is mixed unevenly with the conductive agent, and the electrical conductivity of the thermal battery positive electrode material is low

Method used

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  • Thermal battery composite positive electrode material and preparation method thereof
  • Thermal battery composite positive electrode material and preparation method thereof

Examples

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Embodiment 1

[0034] A high electrical and thermal conductivity battery VO 2 A method for preparing a composite cathode material, the specific steps comprising:

[0035] Preparation of reducing solution A: 0.5g C 6 h 12 o 6 Add 5ml of concentrated nitric acid to a mixed solution of 100ml of water and ethanol (the mass ratio of water to ethanol is 1:1), stir evenly to form reducing solution A;

[0036] Preparation of Ag-containing precursor solution B: 1g AgNO 3 Add to 100ml aqueous solution, continue to add ammonia water until the Ag precursor solution becomes clear, and obtain the Ag precursor solution B;

[0037] 1g VO 2 Add to reducing solution A, stir and mix to obtain suspension C;

[0038] Add the Ag precursor solution B to the reducing solution A at a mass ratio of 1:2, slowly add it to the suspension C, stir and mix, so that the surface of the positive electrode material can generate nano-silver in situ, and dry to remove the solvent Fabricated thermal battery VO with high co...

Embodiment 2

[0040] A high electrical and thermal conductivity battery FeS 2 A method for preparing a composite cathode material, the specific steps comprising:

[0041]Preparation of reducing solution A: Add 2 g of ascorbic acid and 10 ml of concentrated sulfuric acid to a mixed solution of 100 ml of water and glycerol (the mass ratio of water to glycerol is 3:1), and stir evenly to form reducing solution A;

[0042] Preparation of Ag-containing precursor solution B: 1g Ag 2 SO 4 Add to 100ml aqueous solution, continue to add ammonia water until the Ag precursor solution becomes clear, and obtain the Ag precursor solution B;

[0043] 2g FeS 2 Add to reducing solution A, stir and mix to obtain suspension C;

[0044] Add the Ag precursor solution B to the reducing solution A at a mass ratio of 1:4, slowly add it to the suspension C, stir and mix, so that the surface of the positive electrode material can generate nano-silver in situ, and dry to remove the solvent Fabrication of thermal...

Embodiment 3

[0047] FeF battery with high electrical and thermal conductivity 3 A method for preparing a composite cathode material, the specific steps comprising:

[0048] Preparation of reducing solution A: mix 2g sodium tartrate and 10ml H 3 PO 4 Add it to a mixed solution of 100ml of water and glycerin ether (the mass ratio of water to glycerol is 2:1), stir evenly to form reducing solution A;

[0049] Preparation of Ag-containing precursor solution B: 1g AgNO 3 Add to 100ml aqueous solution, continue to add ammonia water until the Ag precursor solution becomes clear, and obtain the Ag precursor solution B;

[0050] FeF 3 Adding to Ag-containing precursor solution B, stirring and mixing to obtain suspension C;

[0051] Slowly add the reducing solution A to the suspension C at a mass ratio of 1:3 to the Ag-containing precursor solution B, stir and mix, so that the surface of the positive electrode material can generate nano-silver in situ, and dry to remove the solvent Fabricated ...

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Abstract

The invention discloses a thermal battery composite positive electrode material and a preparation method thereof, and belongs to the technical field of thermal battery positive electrode materials. The technical problems that when an existing positive electrode material and a conductive agent are compounded, mixing is not uniform, and the conductivity of the thermal battery positive electrode material is low are to be solved. Nano Ag particles are uniformly distributed on the surface of the composite positive electrode material. The preparation method comprises the following steps of uniformly mixing the positive electrode material with one of a silver salt or a reducing agent, generating nano silver on the surface of the positive electrode material in situ under the action of the other one of the silver salt or the reducing agent, and drying to remove a solvent to obtain the thermal battery composite positive electrode material. The nano Ag particles can be controlled to be uniformly generated on the surface of the positive electrode material, so that the conductivity of the thermal battery positive electrode material is improved, and the preparation method is simple and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of positive electrode materials for thermal batteries, in particular to a composite positive electrode material for thermal batteries and a preparation method thereof. Background technique [0002] Thermal battery is a thermally activated reserve battery, which is mainly composed of positive electrode, electrolyte, negative electrode, heating material, etc. It has the advantages of short activation time, long storage time, wide operating temperature range, and high specific power. It is widely used in various military and civil affairs. in the field. [0003] At present, sulfides such as FeS are mainly used in thermal batteries 2 、CoS 2 , Fe-Co-S 2 、NiS 2 etc., oxides such as VO 2 , Lithiated V 2 o 5 , Cu-V-O compound, MnO 2 etc., halogen salts such as NiCl 2 、NiF 2 、CuF 2 , FeF 3 etc., as the cathode material. When the above materials are used as the positive electrode material, when the therma...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M6/36H01M4/485
CPCH01M6/36H01M4/485H01M4/5815H01M4/626H01M2004/028
Inventor 曹勇师东辉李必进王帅熊艳丽付趁崔艳华刘效疆崔益秀
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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