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Rechargeable magnesium cell anode material and preparation thereof

A cathode material and technology for magnesium batteries, which are applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of unsatisfactory cathodes and poor oxidation stability of rechargeable magnesium batteries, so as to reduce synthesis costs and shorten reactions. Period, the effect of speeding up the reaction

Inactive Publication Date: 2009-05-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfide itself has some disadvantages: the oxidation stability is not very good and the preparation of the material requires anaerobic conditions, etc.
Vanadium oxides can also intercalate Mg 2+ , but the presence of water is required, and the positive electrode for rechargeable magnesium batteries is not ideal

Method used

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  • Rechargeable magnesium cell anode material and preparation thereof
  • Rechargeable magnesium cell anode material and preparation thereof
  • Rechargeable magnesium cell anode material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 0.6g of KCl, 0.0968g of MgO, 0.4354g of FeC 2 o 4 2H2 O and 0.1452g of SiO 2 After grinding for 30 minutes until uniform, vacuum-dry at 100°C for 12 hours, then heat-treat at 350°C for 2 hours under a protective atmosphere of argon, then heat-treat at 900°C for 6 hours, and finally cool naturally to room temperature to obtain a rechargeable Magnesium iron magnesium silicate is a cathode material for magnesium batteries.

[0028] The powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the positive electrode material iron magnesium silicate for the rechargeable magnesium battery prepared above. The experimental conditions are as follows: copper target, X-ray wavelength 0.15406 nm, Ni filter; the light tube voltage used is 40kV, the current is 20mA, the scanning range is 15-75°, and the scanning speed is 4° min -1 .

[0029] The anode material for rechargeable magnesium batter...

Embodiment 2

[0033] 0.6g of KCl, 0.0968g of MgO, 0.4354g of FeC 2 o 4 2H 2 O and 0.1452g of SiO 2 After grinding for 30 minutes until uniform, vacuum-dry at 100°C for 12 hours, then heat-treat at 350°C for 2 hours under the protective atmosphere of argon, then heat-treat at 1000°C for 6 hours, and finally cool naturally to room temperature to obtain Magnesium iron magnesium silicate is used as the positive electrode material for magnesium-charged batteries.

[0034] The anode material for rechargeable magnesium batteries prepared above was detected for metal elements on an Iris Advantage 1000 inductively coupled plasma emission spectrometer produced by American Thermoelectric Corporation. The results showed that the molar ratio of Mg and Fe was 1:1.

[0035] The powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the positive electrode material iron magnesium silicate for the rechargeable magne...

Embodiment 3

[0038] 0.6g of KCl, 0.0968g of MgO, 0.2878g of FeC 2 o 4 2H 2 O and 0.1202g of SiO 2 After grinding for 30 minutes until uniform, vacuum-dry at 100°C for 12 hours, then heat-treat at 350°C for 2 hours under a protective atmosphere of argon, then heat-treat at 1000°C for 6 hours, and finally cool naturally to room temperature to obtain a rechargeable Magnesium iron magnesium silicate is the cathode material for magnesium batteries.

[0039] The powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the positive electrode material iron magnesium silicate for the rechargeable magnesium battery prepared above. The experimental conditions are as follows: copper target, X-ray wavelength 0.15406 nm, Ni filter; the light tube voltage used is 40kV, the current is 20mA, the scanning range is 15-75°, and the scanning speed is 4° min -1 .

[0040] The anode material for rechargeable magnesium b...

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Abstract

The invention discloses a rechargeable magnesium cell anode material and a preparation method thereof. The anode material is magnesium ferrosilite which has the chemical structural formula of MgxFeySiO4, wherein x is higher than and equal to 1 and lower than or equal to 1.2, and y is more than or equal to 0.8 and less than or equal to 1. Nanometer silica dioxide is taken as a silicone source; and the magnesium ferrosilite which is the rechargeable magnesium cell anode material obtained through a molten salt method shows the good electrochemical charge and discharge behavior. In the electrolyte of 0.25mol.L<-1>Mg(AlCl2BuEt) 2 / THF and with the discharge rate of 0.2C, the discharge platform reaches 1.5V(vs.Mg / Mg<2+>) and the discharge capacity reaches 151.7mAhg<-1>. In the electrolyte of 0.4mol.L<-1> [Mg2Cl3] + [AlPh2Cl2] -THF and with the discharge rate of 0.4C, the discharge platform reaches 1.2V(vs. Mg / Mg2+) and the discharge capacity reaches 148.5mAhg-1.

Description

technical field [0001] The invention relates to a battery electrode material and a preparation method thereof, in particular to a rechargeable magnesium battery positive electrode material and a preparation method thereof. Background technique [0002] The application of storage batteries in modern society is becoming more and more important and widespread, as can be seen from the extensive application of lithium-ion batteries that have been commercialized in recent years. In addition, with the aggravation of environmental pollution and the increasingly serious energy crisis, there is an urgent need for the popularization of electric vehicles. The rechargeable batteries currently in use are mainly Ni-Cd, lead-acid, Ni-MH and lithium-ion batteries. None of them are clearly ideal or feasible for application in electric vehicles. The obvious disadvantage of the first two batteries is that they contain harmful elements Cd and Pb, which seriously pollute the environment. Lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20H01M4/58
CPCY02E60/12Y02E60/10
Inventor 李云努丽燕娜杨军王久林徐欣欣
Owner SHANGHAI JIAO TONG UNIV
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