A kind of cathode material of magnesium ion battery and preparation method thereof

A technology for magnesium ion batteries and positive electrode materials, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low electronic conductivity and poor material discharge performance at high currents, and achieves simple operation, easy control, and realization of the preparation process. The effect of large-scale industrial production

Inactive Publication Date: 2017-01-04
NINGBO POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this type of positive electrode material is that the electronic conductivity is relatively low, and the high-current discharge performance of the material is poor.

Method used

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  • A kind of cathode material of magnesium ion battery and preparation method thereof
  • A kind of cathode material of magnesium ion battery and preparation method thereof
  • A kind of cathode material of magnesium ion battery and preparation method thereof

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Effect test

Embodiment 1

[0025] Accurately weigh 0.098molMgO, 0.002molSr(CH 3 COO) 2 , 0.010mol ZnO, 0.090mol FeC 2 o 4 2H 2 O and 0.1mol Si(CH 3 CH 2 O) 4 , put it into the agate tank of planetary ball mill after mixing evenly, add absolute ethanol as the mixing medium, fully ball mill with agate balls for 4 hours, dry at 120°C, put the powder in a tube furnace at high temperature Under the protection of pure nitrogen, heat up to 400°C at a heating rate of 5°C / min, hold for 1 hour, continue to heat up to 1000°C, and hold for 6 hours to obtain the positive electrode material Mg for magnesium ion batteries. 0.98 Sr 0.02 Zn 0.1 Fe 0.9 SiO 4 .

[0026] The synthesized magnesium ion battery cathode material Mg 0.98 Sr 0.02 Zn 0.1 Fe 0.9 SiO 4 Mix evenly with acetylene black and polytetrafluoroethylene at a mass ratio of about 75:15:10, press it into a film with a thickness of about 1mm with a film laminator, and dry it fully in an oven at 100°C. The intercepted surface area is 1cm 2 Circu...

Embodiment 2

[0028] Accurately weigh 0.096molMg(OH) 2 , 0.004molSrO, 0.013mol ZnO, 0.087molFeO and 0.1molSi(CH 3 CH 2 O) 4 , mix evenly and put it into the agate tank of the planetary ball mill, add absolute ethanol as the mixing medium, use agate balls to fully mill for 3 hours, dry at 120°C, put the powder in a tube furnace at high temperature Under the protection of pure nitrogen, heat up to 350°C at a heating rate of 4°C / min, hold for 2 hours, continue to heat up to 1100°C, and hold for 4 hours to obtain the positive electrode material Mg for magnesium ion batteries. 0.96 Sr 0.04 Zn 0.13 Fe 0.87 SiO 4 .

[0029] The synthesized magnesium ion battery cathode material Mg 0.96 Sr 0.04 Zn 0.13 Fe 0.87 SiO 4 Mix evenly with acetylene black and polytetrafluoroethylene at a mass ratio of about 75:15:10, press it into a film with a thickness of about 1mm with a film laminator, and dry it fully in an oven at 100°C. The intercepted surface area is 1cm 2 Circular membranes, pressed o...

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Abstract

The invention relates to a positive electrode material of a magnesium ion battery and a preparation method of the positive electrode material. The molecular formula of the positive electrode material is Mg(1-x)-SrxZnyFe(1-y)SiO4, wherein x is greater than 0 and is smaller than or equal to 0.05; y is greater than 0 and is smaller than or equal to 0.03. The preparation method comprises the following steps: adding ethanol into a magnesium source compound, a strontium source compound, a zinc source compound, an iron source compound and a silicon source compound, performing ball-milling, drying, heating to 350-500 DEG C in the presence of argon, keeping the temperature for 1-2 hours, continuously heating to 800-1,200 DEG C, and keeping the temperature for 2-8 hours, thereby obtaining the positive electrode material. The preparation process of the positive electrode material is simple to operate, easy to control and beneficial to achieving on-scale industrial production, and the positive electrode material of the magnesium ion battery is relatively high in reversible capacity and relatively high in large-current charge and discharge performance.

Description

technical field [0001] The invention belongs to the field of electrode materials and preparation thereof, in particular to a positive electrode material of a magnesium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries are currently considered to be the most promising energy storage and kinetic power sources. However, the global lithium resources are not rich, and the abundance of lithium in the earth's crust is only 0.006%. The lack of resources and high prices have become a worry for the large-scale application of lithium-ion batteries in the future. At the same time, the safety problem of lithium-ion battery itself also brings certain difficulties to the practical application. Therefore, there is an urgent need to develop a new energy storage and power battery system with excellent comprehensive performance for the next generation. Compared with lithium resources, magnesium reserves are very rich, the abundance of the earth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/1391
CPCH01M4/5825H01M10/36Y02E60/10
Inventor 袁正勇施立钦
Owner NINGBO POLYTECHNIC
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