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Preparation method of C-coated Mo<x>Co<1-x>S<2> composite positive electrode material

A moxco1-xs2, composite cathode material technology, applied in chemical instruments and methods, battery electrodes, cobalt compounds, etc., can solve problems such as the inability to meet the use requirements of lightweight thermal batteries and the inability to exert complementary advantages, and achieve electrical conductivity. Excellent performance, better thermal stability and higher specific capacity

Inactive Publication Date: 2019-05-28
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MoS prepared by this method 2 and CoS 2 Mixing positive electrode powder is only a simple physical mixing, and the complementary advantages of the two cannot be brought into play
[0005] At present, the positive electrode materials used in China cannot meet the requirements for the use of lightweight thermal batteries for a longer period of time in the future. Regarding the use of MoS 2 and CoS 2 The preparation method of complementary cathode materials has not been reported yet

Method used

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  • Preparation method of C-coated Mo&lt;x&gt;Co&lt;1-x&gt;S&lt;2&gt; composite positive electrode material
  • Preparation method of C-coated Mo&lt;x&gt;Co&lt;1-x&gt;S&lt;2&gt; composite positive electrode material

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 , A C coated Mo x Co 1-x S 2 The preparation method of the composite cathode material includes the following steps:

[0036] Step 1: Weigh the C-containing compound and dissolve it in a solvent of 20 times its mass to form a C-containing compound solution; the C-containing compound is a C-containing organic matter, the C-containing organic matter is glucose, and the C-containing compound is C content is 15%;

[0037] Step 2: Dissolve the Mo source in a solvent of 30 times its volume, then add the Co source, stir evenly for 2 hours, and then add the sulfur source and stir for full reaction to obtain Mo x Co 1-x S 2 Precursor; the Mo source is Na 2 MoO 4 , (NH 4 ) 2 MoO 4 , And the Mo content in the Mo source is 32%; the Co source is CoCl 2 , And the Co content in the Co source is 20%; the sulfur source is NaS 2 , Its S content is 70%; the mass ratio of the Mo source, Co source and sulfur source = 8:5:12;

[0038] Step 3: Put the above Mo x Co 1-x S 2 The precur...

Embodiment 2

[0043] Such as figure 1 , A C coated Mo x Co 1-x S 2 The preparation method of the composite cathode material includes the following steps:

[0044] Step 1: Weigh the C-containing compound and dissolve it in a solvent of twice its mass to form a C-containing compound solution; the C-containing compound is a C-containing organic matter, the C-containing organic matter is ethyl acetate, and the C-containing compound is The content of C in the compound is 90%;

[0045] Step 2: Dissolve Mo source in a solvent twice its volume, then add Co source, stir evenly for 1.5~2.3h, then add sulfur source and stir for full reaction to obtain Mo x Co 1-x S 2 Forebody; the Mo source is K 2 MoO 4 , And the Mo source contains 28% of the total material; the Co source is CoCl 2 , And the Co source contains 18% of the total material; the sulfur source is thiourea, and its S content is 40%; the mass ratio of the Mo source, the Co source and the sulfur source is = 4:1: 10;

[0046] Step 3: Put the above Mo...

Embodiment 3

[0051] Such as figure 1 , A C coated Mo x Co 1-x S 2 The preparation method of the composite cathode material includes the following steps:

[0052] Step 1: Weigh the C-containing compound and dissolve it in a solvent 300 times its mass to form a C-containing compound solution; the C-containing compound is a C-containing organic matter, the C-containing organic matter is cellulose, citric acid, and the The C content in C-containing compounds is 20%;

[0053] Step 2: Dissolve the Mo source in a solvent 300 times its volume, then add the Co source, stir evenly for 2.3 hours, and then add the sulfur source and stir for full reaction to obtain Mo x Co 1-x S 2 Precursor; the Mo source is Na 2 MoO 4 , And the Mo content in the Mo source is 56%; the Co source is CoCl 2 , Na 2 CoO 2 , And the Co content in the Co source is 42%; the sulfur source is sulfur powder, and the S content is 90%; the mass ratio of the Mo source, the Co source and the sulfur source is = 14:21:25;

[0054] Step 3: Put...

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Abstract

The invention discloses a preparation method of a C-coated Mo<x>Co<1-x>S<2> composite positive electrode material, comprising the following steps: dissolving a C-containing compound into a solvent toobtain a C-containing compound solution; dissolving a Mo source in a solvent, sequentially adding a Co source and a sulfur source, and slowly adding into the C-containing compound solution to obtain aC-coated Mo<x>Co<1-x>S<2> material precursor; putting the C-coated Mo<x>Co<1-x>S<2> material precursor into a reaction kettle, vacuumizing, introducing inert gas, heating, heat preserving, cooling, crushing, sieving and drying in vacuum to obtain the C-coated Mo<x>Co<1-x>S<2> composite positive electrode material. According to the application, a bridging effect is achieved for advantage complementation of MoS2 and CoS2, and the thermal stability and electrical conductivity of the C-coated Mo<x>Co<1-x>S<2> composite positive electrode material are improved, and the prepared C-coated Mo<x>Co<1-x>S<2> composite positive electrode material has the advantages of higher specific capacity, better conductivity, better thermal stability and longer discharge time.

Description

Technical field [0001] The invention belongs to the technical field of electrode materials for thermal batteries, and particularly relates to a C-coated Mo x Co 1-x S 2 Preparation method of composite cathode material. Background technique [0002] The thermal battery is a thermally activated storage battery. The electrolyte is a non-conductive solid when stored at room temperature. When in use, an electric firing head or striker mechanism is used to ignite the heating agent inside, so that the electrolyte melts and becomes an ionic conductor. This kind of reserve battery has theoretically unlimited storage time, and the actual measurable value is more than 17 years. Because of its low internal resistance, wide operating temperature range, long storage time, rapid and reliable activation, and no maintenance, it has developed into an ideal power source for modern weapons. [0003] With the rapid development of the defense industry, the requirements for thermal batteries in the appl...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M6/36C01G51/00
Inventor 孟剑万伟华陈铤段其智潘志鹏王京亮李云伟
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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