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Thermal battery positive electrode material with high performance and preparation method thereof

A positive electrode material, thermal battery technology, applied in the direction of primary battery electrode, battery electrode, active material electrode, etc., can solve the problem of poor wettability of the positive electrode active material of thermal battery, etc., to increase the active area of ​​electrochemical reaction, improve the wettability Wetness, performance improvement effect

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

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies or defects, the purpose of the present invention is to provide a high-performance thermal battery positive electrode material and its preparation method, which can effectively solve the problem of poor wettability of the existing thermal battery's molten salt electrolyte to the thermal battery positive electrode active material

Method used

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  • Thermal battery positive electrode material with high performance and preparation method thereof
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Examples

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Embodiment 1

[0034] This embodiment provides a high-performance thermal battery CoS 2 A method for preparing positive electrode materials, including:

[0035] Preparation of precursor solution A: 0.15g Al(NO 3 ) 3 9H 2 O was added to 50ml of deionized water and kept stirring to form precursor solution A;

[0036] Preparation of precursor solution B: Add 0.2ml of ammonium hydroxide (22wt.%) to 50ml of deionized water, and stir evenly to form precursor solution B;

[0037] Preparation of suspension: 2g CoS 2 Add to precursor solution A, keep stirring, then slowly add precursor solution B to the system dropwise, and keep stirring to form a suspension;

[0038] Preparation of solid: Evaporate the suspension to dryness in a water bath at 80°C to obtain a solid, and transfer the solid to a vacuum oven at 80°C for 12 hours to remove water;

[0039] Calcination of solid: transfer the solid to a tube atmosphere furnace, and calcinate at 500°C for 3 hours in an argon atmosphere to prepare a th...

Embodiment 2

[0041] This embodiment provides a method for preparing a high-performance thermal battery CuO positive electrode material, including:

[0042] Preparation of precursor solution A: 0.128g Mg(NO 3 ) 2 ·6H 2 O was added to 50ml of deionized water and kept stirring to form precursor solution A;

[0043] Prepare precursor solution B: add 0.2g sodium hydroxide to 50ml deionized water, stir well to form precursor solution B;

[0044] Preparation of suspension: add 2g CuO to precursor solution A, continue to stir, then slowly add precursor solution B to the system dropwise, and continue to stir to form a suspension;

[0045] Preparation of solid: filter the suspension to obtain a solid, and transfer the solid to a vacuum oven at 80°C for 12 hours to remove moisture;

[0046] Calcination of the solid: Transfer the solid to an electric furnace and calcinate it at 500°C for 3 hours to prepare a high-performance thermal battery CuO cathode material.

Embodiment 3

[0048] This embodiment provides a high-performance thermal battery NiS 2 A method for preparing positive electrode materials, including:

[0049] Preparation of precursor solution A: 0.2688g Al(NO 3 ) 3 9H 2 O was added to 50ml of ethanol and continued to stir to form precursor solution A;

[0050] Preparation of precursor solution B: Add 0.0795g of ammonium fluoride to 50ml of ethanol to form precursor solution B;

[0051] Preparation of suspension: mix 2g NiS 2 Add to precursor solution B, keep stirring, then slowly add precursor solution A to the system dropwise, and keep stirring to form a suspension;

[0052] Preparation of solid: Evaporate the suspension to dryness in a water bath at 80°C to obtain a solid, and transfer the solid to a vacuum oven at 80°C for 12 hours to remove water;

[0053] Calcination of solid: Transfer the solid to an electric furnace and calcinate at 400°C for 3 hours to prepare a NiS thermal battery with high performance 2 Cathode material. ...

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Abstract

The invention discloses a thermal battery positive electrode material with high performance and a preparation method thereof, and belongs to the technical field of thermal batteries. Through the steps of turbid liquid preparation, drying, calcination and the like, in-situ generation of at least one particle of nano-structure MgO, MgF2, Al2O3, AlF3, ZrO2 and SiO2 on the surface of a thermal battery positive electrode active material is realized under specific process conditions, and the wettability of a molten salt electrolyte on the thermal battery positive electrode active material is improved, so that the electrochemical reaction active area between the molten salt and the electrolyte is increased, the ion-electron exchange transfer process in the discharge process is accelerated, and the polarization impedance is reduced, so that when the high-performance positive electrode material is applied to a thermal battery product, the performance of the battery is obviously improved, and the wide application prospects are realized.

Description

technical field [0001] The invention relates to the technical field of thermal batteries, in particular to a high-performance thermal battery cathode material 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 positive electrode active materials. When the above-mentioned positive electrode materials are used, there are problems such as low temperature and hi...

Claims

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Application Information

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IPC IPC(8): H01M4/08H01M4/58H01M6/36
CPCH01M4/08H01M4/5815H01M6/36H01M2004/028Y02E60/10
Inventor 曹勇杨鹏刘鸿雁魏晓春高晨阳陈勇崔艳华王超刘效疆崔益秀
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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