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Thermal battery positive electrode material and preparation method thereof

A technology of positive electrode material and thermal battery, applied in the field of positive electrode material of thermal battery and its preparation, can solve the problems of limited theoretical capacity of positive electrode material, low utilization rate of electrode material, poor safety performance of thermal battery, etc. Guarantee the effect of processability and long working time

Active Publication Date: 2020-04-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiencies of the prior art, and solve the technical problems that restrict the development of thermal batteries, such as the limited theoretical capacity of the positive electrode materials of thermal batteries, low decomposition temperature, low utilization rate of electrode materials, and poor safety performance.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0065] Embodiment 2—using molybdenum disulfide as tungsten molybdenum sulfide

[0066] (1) High temperature roasting

[0067] Place molybdenum disulfide in a quartz tube furnace, pass through argon protective gas, heat it up to 850°C at a heating rate of 10°C / min, roast for 4 hours, cool to 60°C with the furnace, and pass through a 100-mesh sieve.

[0068] (2) Vacuum-atmosphere replacement roasting

[0069] Put the molybdenum disulfide after high-temperature roasting in step (1) into a vacuum roasting furnace, keep the pressure in the furnace at a vacuum of 0.015 MPa, raise the temperature to 600 °C at a heating rate of 10 °C / min, and roast for 1 hour. Slowly feed the equilibrium transfer gas to 0.1Mpa, after calcination for 0.5h, vacuumize and repeat the atmosphere replacement 5 times, and cool down with the furnace in a vacuum state to obtain a molybdenum disulfide sample. The equilibrium transfer gas is a mixed gas of water vapor and argon. The volume percentage of water ...

Embodiment 3

[0077] Embodiment 3—Using tungsten disulfide and molybdenum disulfide as tungsten molybdenum sulfide

[0078] (1) High temperature roasting

[0079] Place molybdenum disulfide and tungsten disulfide in a quartz tube furnace, pass through argon protective gas, raise the temperature to 850 °C at a heating rate of 10 °C / min, roast for 4 hours, cool to 60 °C with the furnace, and pass through 100 mesh sieve.

[0080] (2) Vacuum-atmosphere replacement roasting

[0081] Put the molybdenum disulfide and tungsten disulfide after high-temperature roasting in step (1) into a vacuum roasting furnace, keep the pressure in the furnace at a vacuum of 0.015 MPa, and raise the temperature to 600 °C at a heating rate of 10 °C / min. After roasting for 1 hour, slowly feed the equilibrium transfer gas to 0.1Mpa. After roasting for 0.5 hours, repeat the atmosphere replacement for 5 times by vacuuming, and cool down with the furnace in a vacuum state to obtain a molybdenum disulfide sample. The eq...

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Abstract

The invention discloses a thermal battery positive electrode material and a preparation method thereof. Tungsten (molybdenum) metal ions are used as a positive electrode material of an electron acceptor; the main components of the positive electrode material comprise tungsten (molybdenum) sulfide, an additive, an electronic conductive agent, an ion conductive agent and a binder; through steps of ahigh-temperature roasting process, a vacuum-atmosphere replacement roasting process, an additive passivation treatment process, a mechanical activation roasting process, a crushing, sieving and packaging process and the like, the contents of volatile and decomposed impurities are reduced, the stability of the positive electrode material is improved, and the battery safety is improved. The positive electrode material disclosed by the invention is good in thermal stability, high in material utilization rate, small in self-discharge, large in output capacity and long in working time, and is an ideal positive electrode material of a high-capacity long-time thermal battery.

Description

technical field [0001] The invention belongs to the technical field of chemical power thermal batteries, and more specifically relates to a thermal battery cathode material and a preparation method thereof. Background technique [0002] Thermal battery is a high-temperature molten salt battery, which is an electrochemical system established by heating solid electrolyte to molten ionic conductor by its own heating system. Thermal battery has the characteristics of large output power, long storage life, and short activation time. Ideal power supply for defense equipment. As a military power supply, in addition to requiring the battery to have good electrochemical performance, it also places extremely high requirements on quality and reliability. Since the thermal battery is a molten salt battery, the electrode material must have a high decomposition temperature in addition to sufficient capacity and good conductivity to ensure good electrochemical performance and safe, stable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M4/08H01M6/36
CPCH01M4/5815H01M4/621H01M4/625H01M4/626H01M4/08H01M6/36Y02E60/10
Inventor 胡文彬田千秋韩晓鹏
Owner TIANJIN UNIV
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