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Negative electrode material of high-voltage thermal battery, high-voltage thermal battery and preparation method thereof

A negative electrode material, thermal battery technology, applied in the electrode of primary battery, battery electrode, circuit, etc., can solve the problem of low working voltage of thermal battery, and achieve the effect of increasing working voltage, discharge voltage, and discharge specific capacity.

Inactive Publication Date: 2018-06-15
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the object of the present invention is to provide a high-voltage thermal battery negative electrode material and a high-voltage thermal battery using the thermal battery negative electrode material, so as to solve the problem of low working voltage of the existing thermal battery

Method used

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  • Negative electrode material of high-voltage thermal battery, high-voltage thermal battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A negative electrode material for a high-voltage thermal battery, which is composed of a lithium-silicon alloy and lithium fast ion conductor lithium borate-lithium sulfate coated on the surface of the lithium-silicon alloy; the lithium fast ion conductor lithium borate-lithium sulfate is added in an amount of 20% by weight; lithium fast ion conductor lithium borate-lithium sulfate is prepared by mixing lithium borate crystals and anhydrous lithium sulfate crystals, the mass percentage of lithium borate crystals is 40%; the mass percentage of anhydrous lithium sulfate crystals is 60% %.

[0036] The preparation method of the above-mentioned lithium fast ion conductor lithium borate-lithium sulfate is:

[0037] 1) Analyzing the pure grade LiOH·H from the raw material 2 O and H 3 BO 3 respectively in Al 2 o 3 The crucible was treated at a constant temperature of 500 °C for 1 h, and then the two were sintered at a high temperature of 600 °C for 2 h in an air atmospher...

Embodiment 2

[0041]A high-voltage thermal battery is composed of positive electrode material, negative electrode material and electrolyte diaphragm material, by weight, the content of positive electrode material is 44%; the content of negative electrode material is 21%; the content of electrolyte diaphragm material is 35%; wherein, the positive electrode The material is manganese dioxide material, the negative electrode material is a high-pressure thermal battery negative electrode material composed of lithium-silicon alloy and lithium fast ion conductor lithium borate-lithium sulfate coated on the surface of lithium-silicon alloy, and the electrolyte diaphragm material is lithium nitrate-potassium nitrate- Magnesium oxide material.

[0042] The preparation method of above-mentioned high-voltage thermal battery is:

[0043] (1) Cathode material MnO 2 preparation

[0044] Take 1.5mmol of MnSO 4 ·H 2 O was dissolved in deionized water, and then 3 mmol of KMnO 4 dissolved in deionized wa...

Embodiment 3

[0054] A negative electrode material for a high-voltage thermal battery, which is composed of a lithium-silicon alloy and lithium fast ion conductor lithium borate-lithium sulfate coated on the surface of the lithium-silicon alloy; the lithium fast ion conductor lithium borate-lithium sulfate is added in an amount of 10% by weight; lithium fast ion conductor lithium borate-lithium sulfate is prepared by mixing lithium borate crystals and lithium sulfate anhydrous lithium crystals, the mass percentage of lithium borate crystals is 30%; the mass percentage of anhydrous lithium sulfate crystals is 70% %.

[0055] The preparation method of the above-mentioned lithium fast ion conductor lithium borate-lithium sulfate is:

[0056] 1) Analyzing the pure grade LiOH·H from the raw material 2 O and H 3 BO 3 respectively in Al 2 o 3 The crucible was treated at a constant temperature of 500 °C for 1 h, and then the two were sintered at a high temperature of 600 °C for 2 h in an air a...

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Abstract

The invention discloses a negative electrode material of a high-voltage thermal battery, and the high-voltage thermal battery. The thermal battery consists of a positive electrode material, a negativeelectrode material and an electrolyte diaphragm material; the positive electrode material is a manganese dioxide material; the negative electrode material is a lithium quick ion conductor lithium borate-lithium sulfate-coated lithium silicon alloy material; and the electrolyte diaphragm material is a lithium nitrate-potassium nitrate-magnesium oxide material. By coating the lithium silicon alloyby lithium quick ion conductor lithium borate-lithium sulfate, the interface composition of the negative electrode lithium silicon alloy and the electrolyte lithium nitrate-potassium nitrate and the transmission process of metal positive ions in the interface in the battery working process are changed, so that the diffusion rate and ion electrical conductivity of lithium ions in the interface passivation film layer are greatly improved, and the working voltage of the thermal battery is further improved.

Description

technical field [0001] The invention relates to the technical field of thermal batteries, in particular to a high-voltage thermal battery negative electrode material, a preparation method thereof, and a high-voltage thermal battery using the high-voltage thermal battery negative electrode material. Background technique [0002] Thermal battery is a disposable storage battery using high-temperature molten salt as electrolyte, generally composed of positive electrode, negative electrode, electrolyte diaphragm, heating system and activation system; its working principle is to use the activation system to ignite the ignition paper, and the heating system Under the action of igniting the paper, the electrolyte is heated to make it melt and become an ion conductor to enter the working state; because the thermal battery has the characteristics of high specific energy, high specific power, rapid activation, long storage time and long-term maintenance-free, it is widely used in milita...

Claims

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Application Information

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IPC IPC(8): H01M4/06H01M4/36H01M4/38H01M4/40H01M4/62H01M6/36
CPCH01M4/06H01M4/366H01M4/386H01M4/405H01M4/624H01M6/36
Inventor 杨潇薇王超冯秀丽兰伟刘效疆崔益秀
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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