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Magnesium ion battery cathode material of composite core-shell structure and preparation method thereof, and application of magnesium ion battery cathode material of composite core-shell structure

A magnesium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve problems such as charge and discharge capacity and cycle stability limitations, and achieve excellent electrical properties, mild reaction conditions, and structural stability Improved effect

Active Publication Date: 2019-06-07
LANGFANG GREEN IND TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ferrous magnesium borate used in this invention is a new type of positive electrode material for magnesium ion batteries that is extremely rich in resources and has great application prospects. Compared with the currently widely studied phosphate polyanion compound magnesium ion battery positive electrode material, it can achieve higher specific capacity, but its charge-discharge capacity and cycle stability are still limited

Method used

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  • Magnesium ion battery cathode material of composite core-shell structure and preparation method thereof, and application of magnesium ion battery cathode material of composite core-shell structure
  • Magnesium ion battery cathode material of composite core-shell structure and preparation method thereof, and application of magnesium ion battery cathode material of composite core-shell structure

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Embodiment 1

[0034] The present embodiment provides a positive electrode material for a magnesium ion battery, which includes a magnesium iron magnesium silicate material as an inner core and a coating vanadium oxide covering the surface of the inner core, and the mass ratio of the vanadium oxide to the iron magnesium silicate is: 0.08:1. Its preparation method comprises the following steps:

[0035] (1) Disperse magnesium iron silicate in deionized water to obtain solution A;

[0036] (2) Dispersing vanadium oxide in solution A obtained in step (1) to obtain solution B;

[0037] (3) The solution B obtained in the step (2) was spray-dried for 5 hours at 110° C. under a nitrogen atmosphere to obtain the positive electrode material for the magnesium ion battery.

[0038]Utilize the prepared magnesium ion battery positive electrode material to manufacture magnesium ion battery and carry out electrochemical performance test, the specific method is: the described magnesium ion battery positiv...

Embodiment 2

[0041] This embodiment provides a kind of anode material of magnesium ion battery, and it comprises the manganese-magnesium silicate of magnesium electric anode material as inner core and the cladding titanium oxide that covers on inner core surface, and the mass ratio of described titanium oxide and manganese-magnesium silicate is 0.1:1. Its preparation method comprises the following steps:

[0042] (1) Disperse manganese magnesium silicate in deionized water to obtain solution A;

[0043] (2) Dispersing titanium oxide in solution A obtained in step (1) to obtain solution B;

[0044] (3) The solution B obtained in the step (2) was spray-dried for 3 hours at 120° C. under an argon atmosphere to obtain the positive electrode material for the magnesium ion battery.

[0045] Utilize the prepared magnesium ion battery positive electrode material to manufacture magnesium ion battery and carry out electrochemical performance test, the specific method is: the described magnesium io...

Embodiment 3

[0048] The present embodiment provides a positive electrode material for a magnesium ion battery, which includes a magnesium electric positive electrode material iron cobalt magnesium silicate as an inner core and a coating titanium oxide covering the surface of the inner core, and the mass of the titanium oxide and iron cobalt magnesium silicate The ratio is 0.2:1. Its preparation method comprises the following steps:

[0049] (1) Disperse iron, cobalt and magnesium silicate in deionized water to obtain solution A;

[0050] (2) Dispersing nickel oxide in solution A obtained in step (1) to obtain solution B;

[0051] (3) The solution B obtained in the step (2) was spray-dried for 10 h at 130° C. under a nitrogen atmosphere to obtain the positive electrode material for the magnesium ion battery.

[0052] Utilize the prepared magnesium ion battery positive electrode material to manufacture magnesium ion battery and carry out electrochemical performance test, the specific metho...

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Abstract

The present invention relates to a magnesium ion battery cathode material of a composite core-shell structure and a preparation method thereof, and an application of a magnesium ion battery cathode material of composite core-shell structure. The magnesium ion battery cathode material comprises a magnesium ion battery cathode material as a core and coating used for coating the surface of the core.The coating comprises a composite oxide. The preparation method comprises the steps of: dispersing the magnesium ion battery cathode material into a solvent to obtain a solution A; dispersing the composite oxide into the solution A to obtain a solution B; and finally, performing spraying and drying the solution B to obtain the magnesium ion battery cathode material. The preparation method is simple in process, mild in reaction condition, can achieve morphological control of materials, and is suitable for industrialized production, the prepared magnesium ion battery cathode material has a core-shell structure to greatly improve the structure stability of the material, and the battery prepared by employing the cathode material is excellent in electrical properties, and has high charge-discharge specific capacity and a capacity retention ratio.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a positive electrode material for a magnesium ion battery and a preparation method and application thereof, in particular to a composite core-shell structure magnesium ion battery positive electrode material and a preparation method and application thereof. Background technique [0002] Magnesium secondary battery is considered to be a new type of secondary battery with great potential. The core of magnesium secondary battery is Mg negative electrode, organic electrolyte solution and positive electrode material with good magnesium ion extraction performance. The research on magnesium ion intercalation materials began in the 1970s, but has not yet formed industrial production. The most important thing is that the following two technical difficulties limit the development of magnesium secondary batteries: On the one hand, compared with lithium For ions, the radius of ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/46H01M4/48H01M10/054
CPCY02E60/10
Inventor 谭强强陈清清
Owner LANGFANG GREEN IND TECH CENT
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