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Preparation method for anode material manganese magnesium silicate of rechargeable magnesium cell

A positive electrode material, manganese magnesium silicate technology, applied in the field of preparation of battery electrode materials, can solve the problems of harsh preparation conditions, poor oxidation resistance, etc., achieve the effects of shortening the reaction cycle, small polarization, and reducing synthesis costs

Inactive Publication Date: 2008-12-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the main defect of sulfide is poor oxidation resistance, and Mo 3 S 4 The preparation conditions of Li battery systems and rechargeable magnesium battery technology, J. Power Sources, 2001, 97 ~ 98: 28)

Method used

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  • Preparation method for anode material manganese magnesium silicate of rechargeable magnesium cell
  • Preparation method for anode material manganese magnesium silicate of rechargeable magnesium cell
  • Preparation method for anode material manganese magnesium silicate of rechargeable magnesium cell

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Mix 4 moles of KCl with 1 mole of Mg(CH3 COO) 2 4H 2 O, 1 mole of Mn(CH 3 COO) 2 4H 2 O and 1 mole of SiO 2 After grinding in an agate mortar for 30 minutes, put it into a corundum boat, dry it in vacuum at 100°C for 12 hours, and then heat it at 500°C for 2 hours under the protective atmosphere of argon and hydrogen gas mixture, and then heat it at 1000°C Heat treatment for 6 hours, and finally naturally cool down to room temperature to obtain a manganese-magnesium silicate positive electrode material for a rechargeable magnesium battery.

[0022] A powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the manganese magnesium silicate as the positive electrode material 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 20...

Embodiment 2

[0026] Mix 4 moles of KCl with 1 mole of MgO, 1 mole of MnCO 3 and 1 mole of SiO 2 After grinding in an agate mortar for 30 minutes, put it into a corundum boat, dry it in vacuum at 100°C for 12 hours, and then heat it at 350°C for 2 hours under the protective atmosphere of argon and hydrogen gas mixture, and then heat it at 1000°C Heat treatment for 6 hours, and finally naturally cool down to room temperature to obtain a manganese-magnesium silicate positive electrode material for a rechargeable magnesium battery.

[0027] A powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the manganese magnesium silicate as the positive electrode material 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°, an...

Embodiment 3

[0031] Mix 0.464 mol of KCl, 0.336 mol of NaCl with 1 mol of MgO, 1 mol of MnCO 3 and 1 mole of SiO 2 After grinding in an agate mortar for 30 minutes, put it into a corundum boat, dry it in vacuum at 100°C for 12 hours, and then heat it at 350°C for 2 hours under the protective atmosphere of argon and hydrogen gas mixture, and then heat it at 800°C , heat treatment at 900°C or 1000°C for 6 hours, and finally cool down to room temperature naturally to obtain a manganese magnesium silicate as a positive electrode material for a rechargeable magnesium battery.

[0032] A powder X-ray diffraction experiment was carried out on the Rigaku D / MAX2200PC X-ray diffractometer produced by Shimadzu Corporation of Japan with the manganese magnesium silicate as the positive electrode material 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 curre...

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Abstract

The invention discloses a production method for manganous / magnesium silicate of chargeable magnesium battery positive pole material, which is the manganous / magnesium silicate of chargeable magnesium battery positive pole material using molten salts as reaction medium and having the characteristics of quickening up reaction speed, shortening reaction cycle, simplifying synthesis course, reducing synthesis cost, small synthesis particle size and symmetrical distribution of the particles. The material exhibits remarkable electrochemical charge and discharge effects, the steady discharge platform works up to 1.6V and 1.1V(vs.Mg / Mg<2+>); on the charge and discharge conditions of C / 20 current density, the discharge capacitance can reach 289.3mAh*g<-1>(theoretical capacitance is 92%). In contrast to the relatively ideal positive pole material Mo3S4 of the current chargeable magnesium battery, the manganous / magnesium silicate positive pole material produced by the molten salt process has the advantages of simple production, large capacitance, high discharge voltage platform and the like.

Description

technical field [0001] The invention relates to a preparation method of a battery electrode material, in particular to a preparation method of manganese magnesium silicate, a positive electrode material of a rechargeable magnesium battery. Background technique [0002] With people's increasing attention to the fields of energy, resources and the environment, it is urgent to develop high-performance, low-cost green chemical power sources. Magnesium is a living wave metal of group II in the diagonal position with lithium in the periodic table of elements, and has a large theoretical specific capacity (2205mAh g -1 ). Compared with lithium, magnesium is cheap (about 1 / 24 of lithium), environmentally friendly, has a high melting point (649°C), is easy to process, and has high safety. Therefore, a rechargeable magnesium battery using magnesium as the negative electrode is a kind of A chemical power source with good prospects. Although it cannot compete with lithium batteries us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04C01B33/20B01J19/00
CPCY02E60/10
Inventor 努丽燕娜杨军冯真真李云王久林
Owner SHANGHAI JIAO TONG UNIV
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