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Composite cathode material for thermal battery and preparation method of composite cathode material

A composite positive electrode material and a technology for positive electrode materials are applied in the field of composite positive electrode materials for thermal batteries and their preparation, and can solve the problem that the capacity and conductivity of positive electrode materials for thermal batteries are difficult to reconcile, the preparation method of composite positive electrode materials is cumbersome, and the chemical composition of batch products is different. It can achieve the effect of excellent high-power discharge capacity, improved actual utilization rate, and low production cost

Active Publication Date: 2015-12-09
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials have improved the electrochemical performance of cathode materials to a certain extent, but they have not fundamentally solved the problem that the capacity and conductivity of cathode materials for thermal batteries are difficult to reconcile.
and Fe 1-x co x S 2 The preparation method of composite cathode materials is extremely cumbersome, the output is small, and the chemical composition of batches of products varies greatly, which is not feasible for engineering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The weight ratio of each component of the target product thermal battery composite positive electrode material is: FeS 2 55%, CoS 2 Accounted for 35%, lithium oxide accounted for 5%, ultrafine conductive powder accounted for 5%, of which molybdenum powder accounted for 35% of the mass ratio of ultrafine conductive powder. First put the four raw materials into the powder mixer, mix until the system is uniform, and obtain the precursor of the target product. Transfer the precursor into a quartz bowl, put it into a tube furnace, raise the temperature to 150°C, pass in high-temperature water-argon mixed steam for calcination for 2 hours, in which water vapor accounts for 5% of the volume of the mixed steam, take out the quartz bowl, and let it cool naturally , after pulverization or ball milling, and vacuum drying, the desired product can be obtained. The measured volume resistance of the product is 0.00067 Ω·cm, and the actual capacity of the thermal battery prepared by ...

Embodiment 2

[0027] The weight ratio of each component of the target product thermal battery composite positive electrode material is: FeS 2 25%, CoS 2 Accounted for 65%, lithium oxide accounted for 1%, ultra-fine conductive powder accounted for 9%, of which molybdenum powder accounted for 65% of the mass ratio of ultra-fine conductive powder. First put the four raw materials into the powder mixer, mix until the system is uniform, and obtain the precursor of the target product. Transfer the precursor into a quartz bowl, put it into a tube furnace, raise the temperature to 160°C, pass in high-temperature water-argon mixed steam for calcination for 2 hours, in which water vapor accounts for 10% of the volume of the mixed steam, take out the quartz bowl, and let it cool naturally , after pulverization or ball milling, and vacuum drying, the desired product can be obtained. The measured volume resistance of the product is 0.00017 Ω·cm, and the actual capacity of the thermal battery prepared ...

Embodiment 3

[0029] The weight ratio of each component of the target product thermal battery composite positive electrode material is: FeS 2 40%, CoS 2 Accounted for 45%, lithium oxide accounted for 5%, ultra-fine conductive powder accounted for 10%, of which molybdenum powder accounts for 65% of the mass ratio of ultra-fine conductive powder. First put the four raw materials into the powder mixer, mix until the system is uniform, and obtain the precursor of the target product. Transfer the precursor to a quartz bowl, put it into a tube furnace, raise the temperature to 180°C, pass high-temperature water-argon mixed steam for calcination for 1 hour, in which water vapor accounts for 30% of the volume of the mixed steam, take out the quartz bowl, and let it cool naturally , after pulverization or ball milling, and vacuum drying, the desired product can be obtained. The measured volume resistance of the product is 0.00025 Ω·cm, and the actual capacity of the thermal battery prepared by usi...

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Abstract

The invention discloses a composite cathode material for a thermal battery and a preparation method of the composite cathode material. The composite cathode material for the thermal battery disclosed by the invention comprises the following raw materials in percentage by mass: 25%-55% of FeS2, 35%-65% of CoS2, 1%-5% of lithium oxide and 5%-10% of superfine conductive powder. The composite cathode material disclosed by the invention is high in conductivity and high in service efficiency.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a composite positive electrode material for a thermal battery and a preparation method thereof. Background technique [0002] The thermal battery is a kind of thermally activated reserve battery that uses the heating system of the battery itself to heat and melt the non-conductive solid-state salt electrolyte into an ionic conductor and enter the working state. Because of its high discharge power, maintenance-free life, and short activation time, it is very suitable as a special battery for missiles, torpedoes and other weapons. For the continuous development of thermal battery electrical performance, its electrode materials are also constantly updated. However, so far, the only widely used cathode material for thermal batteries is FeS 2 and CoS 2 Two, FeS 2 The capacity of cathode material is 1206A·S / g higher than that of CoS 2 The capacity of 1044A·S / g, whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M6/36
CPCH01M4/364H01M4/5815H01M4/624H01M6/36
Inventor 罗重霄汤胜郑要武王超胡小薇宋维相季柳燕
Owner SHANGHAI INST OF SPACE POWER SOURCES
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