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Formula of thermal battery CoS2 cathode material and processing technology

A technology of positive electrode material and processing technology, which is applied in the formulation and processing technology of thermal battery positive electrode material CoS2, which can solve the problems of battery safety, battery pressure increase, etc.

Inactive Publication Date: 2012-07-04
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Synthetic CoS 2 The surface of the positive electrode material contains a large amount of sulfur element. High temperature will generate sulfur vapor, which will increase the air pressure inside the battery and cause problems with the safety of the battery. Therefore, it cannot be directly used in a thermal battery. It needs to be processed in the early stage before it can be used as a thermal battery. Cathode material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A treatment process and formulation of a positive electrode material for a thermal battery: the positive active material cobalt disulfide (CoS 2 ) material into the enamel tray, put it into the vacuum drying oven to remove water at 125°C. The positive electrode active material cobalt disulfide (CoS 2 ) materials were sintered at 500°C for 8 hours under the protection of an inert gas, sieved after cooling, and pressed cobalt disulfide (CoS 2 ) 80%, lithium oxide 5%, and eutectic salt 15%, sintered at 500°C for 6 hours, cooled to room temperature, milled, passed through an 80-mesh sieve, and bottled for later use. The mass percent composition of the eutectic salt is: 68.44% LiBr, 22% LiCl and 9.56% LiF.

Embodiment 2

[0017] A treatment process and formulation of a positive electrode material for a thermal battery: the positive active material cobalt disulfide (CoS 2 ) material into the enamel tray, put it into the vacuum drying oven for 125 ℃ high temperature dehydration. The positive electrode active material cobalt disulfide (CoS 2 ) materials were sintered at 500°C for 8 hours under the protection of an inert gas, sieved after cooling, and pressed cobalt disulfide (CoS 2 ) 73.5%, lithium oxide 5.5%, and eutectic salt 21%, sintered at 400°C for 6 hours, cooled to room temperature, milled, passed through an 80-mesh sieve, and bottled for later use. The mass percent composition of the eutectic salt is: 36.53% LiBr, 12.05% LiCl and 51.42% KBr.

Embodiment 3

[0019] A treatment process and formulation of a positive electrode material for a thermal battery: the positive active material cobalt disulfide (CoS 2 ) material into the enamel tray, put it into the vacuum drying oven for 125 ℃ high temperature dehydration. The positive electrode active material cobalt disulfide (CoS 2 ) materials were sintered at 500°C for 8 hours under the protection of an inert gas, sieved after cooling, and pressed cobalt disulfide (CoS 2 ) 75%, lithium oxide 5%, eutectic salt 20%, sintered at 360°C for 6 hours, cooled to room temperature, milled, passed through an 80-mesh sieve, and bottled for later use. The mass percent composition of the eutectic salt is: 0.68% LiF, 42.03% KBr and 57.29% LiBr.

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Abstract

The invention discloses a formula of a thermal battery CoS2 cathode material and processing technology. The formula comprises the following components by mass: 70.5%-85% of cobaltous sulfide CoS2, 5%-15% of lithium oxide, 16%-25% of molten salts. The processing technology of the formula comprises the following steps: adding the cathode active substance of the cobaltous sulfide CoS2 material in an enamel disc, putting in a vacuum drying oven, performing high temperature dehydration at 90 DEG C-250 DEG C; performing high temperature sintering of the dehydrated cobaltous sulfide CoS2 at 290 DEG C-500 DEG C under inert gas protection for 4 h-8 h, cooling and sieving, adding 5%-15% of lithium oxide and 16%-25% of molten salts into the cobaltous sulfide CoS2, mixing and sintering at 330 DEG C-500 DEG C for 4 h-6 h, cooling to room temperature, sieving by a 80-mesh sieve so as to prepare the high temperature resistant thermal battery cathode composite material which is bottled to keep in reserve. The invention can improve the security of thermal batteries, and increase the active substance utilization rate.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, in particular to a thermal battery cathode material CoS 2 formulations and processing techniques. Background technique [0002] Thermal batteries are heat-activated batteries, which use molten salt as an electrolyte and use a heat source to melt and activate a primary reserve battery. The electrolyte is a non-conductive solid at normal temperature. The battery ignites the pyrotechnic heat source in the battery pack by hitting the fire cap or igniting the electric ignition head, so that the temperature in the battery pack rises instantaneously to 450 ° C ~ 550 ° C, and the electrolyte melts into high-conductivity ions. conductor, activates the thermal battery pack, and outputs electricity. Thermal batteries have high specific energy and specific power, wide operating environment temperature (generally -55°C to +70°C), long storage time (10 to 25 years), short activation time (generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/08
CPCY02E60/12
Inventor 吴启兵万伟华龚英韬魏俊华张勇吴展强赵洪楷
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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