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a li 1+x v 3 o 8 Composite cathode material and preparation method thereof

A composite cathode material, V2O5 technology, applied in the field of thermal battery materials, can solve the problems of unsolved gas expansion, poor electrical conductivity, expensive graphene, etc., and achieve the effects of low price, low preparation cost and high working voltage

Active Publication Date: 2020-11-03
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provided by this patent, although it solves the problem of LiV 3 o 8 The problem of poor conductivity, but graphene is expensive, increasing the Li 1+x V 3 o 8 The preparation cost of electrode materials; and also does not address the CO generated due to doping carbon materials 2 gas expansion problem

Method used

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  • a li <sub>1+x</sub> v <sub>3</sub> o <sub>8</sub> Composite cathode material and preparation method thereof
  • a li <sub>1+x</sub> v <sub>3</sub> o <sub>8</sub> Composite cathode material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of Li 1+x V 3 o 8 The preparation method of composite cathode material comprises the following steps:

[0029] (1) Take V 2 o 5 Dissolved in hydrogen peroxide 10 times its mass to make V 2 o 5 sol solution; then take V 2 o 5 Add 10% LiOH by mass to V 2 o 5 In the sol solution, stir evenly to obtain the lithiated vanadium oxide sol solution;

[0030] (2) Get 10% glucose of the lithiated vanadium oxy compound sol solution mass and dissolve it in water 3 times of its mass to make a carbon compound solution; The rate of stirring was raised to 50 ° C, and the temperature was kept for 24 hours to obtain carbon-coated Li 1+x V 3 o 8 Sol precursor; wherein, the heating rate is 2°C / min;

[0031] (3) Coating carbon with Li 1+x V 3 o 8 The sol precursor was heated to 400°C at a rate of 2°C / min under the protection of nitrogen, kept for 0.5h, cooled naturally, crushed, and passed through a 100-mesh sieve to obtain carbon-coated Li 1+x V 3 o 8 Cathode mate...

Embodiment 2

[0034] A kind of Li 1+x V 3 o 8 The preparation method of composite cathode material comprises the following steps:

[0035] (1) Take V 2 o 5 Dissolved in hydrogen peroxide 10 times its mass to make V 2 o 5 sol solution; then take V 2 o 5 15% Li by mass 2 CO 3 Join V 2 o 5 In the sol solution, stir evenly to obtain the lithiated vanadium oxide sol solution;

[0036] (2) Get the citric acid of 6% of lithiated vanadium oxy compound sol solution quality and be dissolved in the water of 10 times of its quality, make carbon compound solution; Add carbon compound solution in the lithiated vanadium oxy compound sol solution, with 200r / The temperature was stirred at a rate of 1 min to 250 °C, and kept for 1 h to obtain carbon-coated Li 1+x V 3 o 8 Sol precursor; wherein, the heating rate is 5°C / min;

[0037] (3) Coating carbon with Li 1+x V 3 o 8 The sol precursor was heated to 500 °C at a rate of 5 °C / min under the protection of argon, kept for 0.5 h, and after na...

Embodiment 3

[0040] A kind of Li 1+x V 3 o 8 The preparation method of composite cathode material comprises the following steps:

[0041] (1) Take V 2 o 5 Dissolve in hydrogen peroxide 50 times its mass to make V 2 o 5 sol solution; then take V 2 o 5 Add 30% LiOH by mass to V 2 o 5 In the sol solution, stir evenly to obtain the lithiated vanadium oxide sol solution;

[0042] (2) get 10% stearic acid of lithiated vanadium oxy compound sol solution quality and be dissolved in the ethanol of 100 times of its quality, make carbon compound solution; Carbon compound solution is added in lithiated vanadium oxy compound sol solution, with Stirring at a rate of 1200r / min raised the temperature to 350°C and kept it for 24h to obtain carbon-coated Li 1+x V 3 o 8 Sol precursor; wherein, the heating rate is 10°C / min;

[0043] (3) Coating carbon with Li 1+x V 3 o 8 The sol precursor was heated to 600°C at a rate of 10°C / min under the protection of two mixed gases of nitrogen and argon, ...

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Abstract

The invention belongs to the technical field of thermal battery materials, in particular to a Li1+xV3O8 composite positive electrode material and a preparation method thereof. The Li1+xV3O8 compositepositive electrode material is a composite material with a lithium-rich carbon layer covered by Li1+xV3O8. The preparation method comprises the following process: firstly dissolving V2O5 in hydrogen peroxide to prepare a V2O5 sol solution and adding alkaline lithium salt to prepare a lithium vanadium oxide sol solution; then adding a carbon compound solution to the lithium vanadium oxide sol solution for reaction to obtain a carbon-coated Li1+xV3O8 sol precursor; then pyrolyzing the carbon-coated Li1+xV3O8 sol precursor, pulverizing and sieving to obtain carbon-coated Li1+xV3O8 powder; and finally adding a halogenated lithium salt and a lithium-based CO2 absorbent into the carbon-coated Li1+xV3O8 powder. The Li1+xV3O8 composite positive electrode material has high working voltage, good conductivity and good thermal stability and can be used in the design of the high-power thermal battery and has the CO2 absorption function and can improve the safety of the thermal battery.

Description

technical field [0001] The invention belongs to the technical field of thermal battery materials, in particular to a Li 1+x V 3 o 8 Composite cathode material and preparation method thereof. Background technique [0002] Thermal battery is a heat-activated reserve battery. When stored at room temperature, the electrolyte is a non-conductive solid. When in use, an electric ignition head or a firing pin mechanism is used to ignite the heating agent inside, so that the electrolyte melts into an ion conductor and is activated. A reserve battery, the storage time is theoretically unlimited, and the actual measurable value is more than 17 years. Thermal batteries have low internal resistance, wide operating temperature range, long storage time, quick and reliable activation, and no maintenance, and have developed into an ideal power source for modern weapons. [0003] With the rapid development of the defense industry, the requirements for thermal batteries in various applicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/62H01M6/30
CPCH01M4/485H01M4/625H01M6/36H01M2004/028
Inventor 孟剑李云伟陈铤万伟华王京亮潘志鹏吴启兵
Owner GUIZHOU MEILING POWER SUPPLY CO LTD