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Manganese spinel doped with magnesium, cathode material comprising same, method for preparing same and lithium ion battery comprising same

A lithium-ion battery, manganese spinel technology, applied in the field of energy storage systems

Inactive Publication Date: 2020-07-14
UNIV DE ANTOFAGASTA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0038] The present invention addresses the problems of improving the structural and electrochemical properties of spinel, reducing the particle size at the nanoscale, and doping the structure with magnesium ions

Method used

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  • Manganese spinel doped with magnesium, cathode material comprising same, method for preparing same and lithium ion battery comprising same
  • Manganese spinel doped with magnesium, cathode material comprising same, method for preparing same and lithium ion battery comprising same
  • Manganese spinel doped with magnesium, cathode material comprising same, method for preparing same and lithium ion battery comprising same

Examples

Experimental program
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Embodiment 1

[0056] Example 1: Preparation of manganese spinel doped with magnesium

[0057] Pure spinel (LiMnO 4 ) and spinel doped with Mg (LiMg 0.05 mn 1.95 o 4 ). For the synthesis of manganese spinel, except for the addition of Mg(OH) to Mg-doped spinel 2 (≥99%, Fluka Analytical), use lithium raw material and manganese raw material respectively: Li 2 CO 3 (battery grade ≥99.5%, Rockwood–Chile) and Mn(CH 3 COO) 2 (≥99%, Sigma Aldrich).

[0058] For the synthesis, two aqueous solutions were prepared. The first solution corresponds to adding a stoichiometric amount of the metal ion precursor Li for pure spinel at room temperature 2 CO 3 and Mn(CH 3 COO) 2 and precursors of metal ions for Mg-doped spinel Li 2 CO 3 , Mn(CH 3 COO) 2 and Mg(OH) 2 Dissolved in distilled water, the second solution corresponds to dissolving the organic precursors ethylene glycol and citric acid in distilled water. The two aqueous solutions were mixed with constant stirring. The pH of the resul...

Embodiment 2

[0059] The preparation of embodiment 2 cathode coating

[0060] To make the cathode coating, a suspension in NMP solution (n-methylpyrrolidone) was prepared consisting of 90% by weight of cathode active material [pure manganese spinel (LiMn 2 o 4 ) or spinel doped with Mg (LiMg 0.05 mn 1.95 o 4 ) or commercial spinel (Li 1.16 mn 1.84 o 3.996 S 0.004 )], 5% by weight of carbon black as a conductive additive, and 5% by weight of PVdF (polyvinylidene fluoride) as a binder. The mixing process of the coating suspension was carried out in a paddle mixer under static vacuum conditions (=0.1 atmospheres) to minimize water contamination of the suspension. The different components of the positive electrode, cathode active material, conductive additive and binder were added one by one to minimize agglomeration and achieve homogeneity of the suspension.

[0061] The obtained suspension was deposited on Al paper as a current collector for cathodic coating, and then underwent a pre...

Embodiment 3

[0068] Example 3: Characterization of physical and chemical properties

[0069] The physical and chemical properties of the synthesized cathode materials and commercially available materials were determined by applying the following characterization techniques:

[0070] - Solid Picnometry to determine the apparent density of synthetic cathodically active compounds and commercially available products.

[0071] - Scanning electron microscopy (SEM-EDS, TESCAN, Vega 3LMU) with X-ray dispersive spectroscopy detector to study the morphology, homogeneity of pure spinel, Mg-doped spinel and commercial spinel , particle size at the microchrome level, and elemental composition.

[0072] - Atomic Force Microscopy - Raman (AFM RAMAN, WITec, alpha300) to determine the particle size of the synthesized nanoscale cathode material.

[0073] - X-ray diffraction (DRX, Bruker, D8 Advance-A25) of crystalline powders using Cu Kα radiation to determine and compare structural parameters and identif...

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Abstract

The present invention relates to the field of technologies for powering portable electronics, electrical tools, hybrid and electric vehicles and storage systems for renewable energy sources. Specifically, the invention relates to lithium ion batteries, more specifically to an active compound useful for manufacturing the cathodes in said lithium ion batteries. Even more specifically, the present invention relates to a manganese spinel doped with magnesium, a cathodic material comprising same, the method for preparing the material and lithium ion batteries comprising same.

Description

technical field [0001] The present invention relates to the technical field of energy storage systems for powering portable electronic components, power tools, hybrid and electric vehicles, and renewable energy sources. In particular, the present invention relates to lithium ion batteries, and more particularly to active compounds useful in the manufacture of cathodes in such lithium ion batteries. Still more particularly, the present invention relates to magnesium-doped manganese spinels, cathode materials comprising the same, methods of preparation, and lithium ion batteries comprising the same. Background technique [0002] Lithium-ion batteries have an unrivaled combination of high energy density and power, which is why they are the preferred choice for powering portable electronic components, power tools, hybrid and electric vehicles, and for powering storage systems from renewable resources. The chosen technology. [0003] At present, lithium cobalt oxide LiCoO 2 is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M10/052H01M10/0525
CPCH01M4/505H01M10/0525Y02E60/10C01G45/1242C01P2002/32C01P2002/54C01P2002/72C01P2006/40Y02P20/133H01M2004/028H01M4/0404H01M4/0435H01M4/625H01M4/623H01M50/105H01M4/587H01M4/1391H01M10/052H01M4/0471
Inventor 马里奥·桑德罗·格拉赫达塞加拉阿列克谢·温莎·卢斯科基斯佩斯维特拉娜·尼古拉耶芙娜·乌沙克德格拉赫达
Owner UNIV DE ANTOFAGASTA
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