Preparation method of magnesium ion battery negative electrode material

A technology of magnesium ion batteries and negative electrode materials, which is applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., to achieve the effects of enriching negative electrode material types, good electrochemical reaction reversibility and charge-discharge performance, and high reaction temperature

Inactive Publication Date: 2021-03-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Low-valence transition metal compounds are an important class of high-energy anod

Method used

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  • Preparation method of magnesium ion battery negative electrode material
  • Preparation method of magnesium ion battery negative electrode material
  • Preparation method of magnesium ion battery negative electrode material

Examples

Experimental program
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Example Embodiment

[0019] Embodiment:

[0020] Weigh the commercial analysis of pure tetrahydrate manganese (MN (C) 2 Hide 3 O 2 ) 2 · 4h 2 O, content ≥99.0%) 2.45g and thiourea (H 2 NCSNH 2 , Content ≥99.0%) 0.91 g, analysis of 25 mL of analysis of pure glycerol (C 3 Hide 8 O 3 In the content of ≥99.0%, stirred and slowly heated, the temperature is increased to 80 ° C for 30 min, resulting in a homogeneous dispersion, transferred to the three-necked bottle, heating the temperature to 170 ° C, heat insulation reaction for 4 h, naturally cooled to room temperature The supernatant was removed, washed with anhydrous ethanol and deionized water, centrifuged, until the supernatant was clarified, and then the precipitate was dried in a vacuum drying tank at 60 ° C for 8 h, resulting in a sulphide sample. X-ray diffraction pattern of sulphide samples See figure 1 Mainly fibrous mineral sulfide; it is scanned electron microscope figure 1 For spherical particle morphology, the particle size is 0.1 to 2 μm....

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Abstract

The invention discloses a preparation method of a magnesium ion battery negative electrode material. Glycerol is used as a dispersing agent, thiourea and manganese acetate react at a certain molar ratio, temperature and time, and manganese sulfide with a wurtzite structure is obtained; and then an electrode is manufactured, and a button type magnesium ion half cell is assembled. The electrochemical test result shows that the manganese sulfide negative electrode material has relatively good electrochemical reaction reversibility, the equilibrium voltage of the manganese sulfide negative electrode material is about 0.77V (vs.Mg/Mg<2+>), the first specific discharge capacity can reach 155.75 mAh.g<-1>, and the first Coulombic efficiency reaches 93.0%. Therefore, the manganese sulfide has a good development prospect when being used as the negative electrode material of the magnesium ion battery.

Description

technical field [0001] The invention belongs to the technical field of magnesium ion batteries, and in particular relates to a preparation method of an electrode material and its electrochemical performance for storing magnesium. Background technique [0002] Magnesium metal is rich in resource reserves, has a large volume specific energy, and most of its compounds are low-toxic or non-toxic, environmentally friendly, high in safety, and low in cost. Therefore, magnesium-ion batteries are very promising secondary batteries. [0003] In recent years, magnesium-ion batteries have been extensively studied in terms of electrolytes and cathode materials. However, there are relatively few research reports on anode materials for magnesium-ion batteries, mainly including magnesium metals, transition metals and their alloys, lithium titanate, and titanium dioxide. Metal and alloy anode materials have serious volume expansion during charging and discharging, which leads to poor cycl...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054C01G45/00
CPCH01M4/5815H01M10/054C01G45/00C01P2002/72C01P2004/03C01P2006/40C01P2004/32C01P2004/62C01P2004/61Y02E60/10
Inventor 杨建文仝蒙恩熊伟雄刘鑫鑫
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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