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Five-element transition-non-transition high-entropy oxide negative electrode material for lithium-ion battery

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, negative electrodes, nickel compounds, etc., can solve the problems of reversible lithium storage performance that have not been found in high-entropy oxides, achieve uniform structure, alleviate structural damage, and simple reaction process. Effect

Active Publication Date: 2019-12-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above research on high-entropy oxide anode materials for lithium-ion batteries mainly focuses on the rock-salt structure (Mg 0.2 co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 )O, there is no report on the reversible lithium storage performance of high-entropy oxides with other crystal structures

Method used

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  • Five-element transition-non-transition high-entropy oxide negative electrode material for lithium-ion battery
  • Five-element transition-non-transition high-entropy oxide negative electrode material for lithium-ion battery
  • Five-element transition-non-transition high-entropy oxide negative electrode material for lithium-ion battery

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Effect test

Embodiment 1

[0031] A kind of lithium-ion battery of the present invention is prepared by solution combustion method with five-element transition-non-transition high-entropy oxide negative electrode material, and its chemical composition is (Al 0.2 co 0.2 Cr 0.2 Fe 0.2 Ni 0.2 ) 3 o 4 : Take by weighing the metal nitrate of equimolar amount according to molecular formula, specifically: the Al(NO of 3.751g 3 ) 3 9H 2 O, 2.910g of Co(NO 3 ) 2 ·6H 2 O, 4.002g of Cr(NO 3 ) 3 9H 2 O, 4.040g of Fe(NO 3 ) 3 9H 2 O and 2.908g of Ni(NO 3 ) 2 ·6H 2 O, dissolved in 10mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 3.003g glycine and added to the mixed solution, stirred evenly to obtain a transparent sol; then put the above transparent sol in Dry it in an oven at 80°C, and obtain a viscous gel after evaporating water; finally, place the above gel in a gold furnace and keep it at 750°C for 20 minutes to obta...

Embodiment 2

[0033] A kind of lithium-ion battery of the present invention is prepared by solution combustion method with a five-element transition-non-transition high-entropy oxide negative electrode material, and its chemical composition is (Mg 0.2 Cr 0.2 Fe 0.2 mn 0.2 Zn 0.2 ) 3 o 4 : Take by weighing the metal nitrate of equimolar amount according to molecular formula, specifically: the Mg(NO of 2.564g 3 ) 2 ·6H 2 O, 4.002g of Cr(NO 3 ) 3 9H 2 O, 4.040g of Fe(NO 3 ) 3 9H 2 O, 2.870g of Mn(NO 3 ) 2 4H 2 O and 2.975g of Zn(NO 3 ) 2 ·6H 2 O, dissolved in 2.5mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 1.402g of hexamethylenetetramine and added to the mixed solution, stirred evenly to obtain a transparent sol; Then put the above-mentioned transparent sol in an oven at 100°C to dry, and obtain a viscous gel after evaporating water; finally, place the above-mentioned gel in a muffle furnace an...

Embodiment 3

[0035] A kind of lithium-ion battery of the present invention is prepared by solution combustion method with five-element transition-non-transition high-entropy oxide negative electrode material, and its chemical composition is (Al 0.2 Mg 0.2 Cr 0.2 Fe 0.2 Zn 0.2 ) 3O4: take by weighing the metal nitrate of equimolar amount according to molecular formula, specifically: the Al(NO of 3.751g 3 ) 3 9H 2 O, 2.564g of Mg(NO 3 ) 2 ·6H 2 O, 4.002g of Cr(NO 3 ) 3 9H 2 O, 4.040g of Fe(NO 3 ) 3 9H 2 O and 2.975g of Zn(NO 3 ) 2 ·6H 2 O, dissolved in 5mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 1.877g glycine and 4.504g glucose and added to the mixed solution, stirred evenly to obtain a transparent sol; then the above The transparent sol was dried in an oven at 150°C, and a viscous gel was obtained after evaporating water; finally, the above gel was placed in a muffle furnace and kept at 550°...

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Abstract

The invention provides a five-element transition-non-transition high-entropy oxide negative electrode material for a lithium-ion battery and relates to the technical field of high-entropy oxide powdermaterials. The chemical formula of the material is (XaMbQcF0. 2Y0. 2Z0. 2)3O4, wherein a is equal to 0, b is equal to c which is equal to 0.2 or b is equal to 0, a is equal to c which is equal to 0.2or c which is equal to 0, a is equal to b which is equal to 0.2, X and M are one of non-transition metal positive ions Mg2+ and Al3+, X and M cannot be the same non-transition metal positive ion, Q,F, Y and Z are one of transition metal positive ions Co2+, Cr3+, Fe3+, Mn2+, Ni2+ and Zn2+, and Q, F, Y and Z cannot be the same transition metal positive ion. The material is prepared by a solution combustion method, and the material has a high specific surface area, a porous structure and good large-current charging and discharging characteristics.

Description

technical field [0001] The invention relates to the technical field of high-entropy oxide powder materials, in particular to a five-element transition-non-transition high-entropy oxide negative electrode material for lithium ion batteries. Background technique [0002] With the improvement of the performance of cathode materials for lithium-ion batteries, correspondingly higher requirements are placed on anode materials. Compared with the positive electrode materials, the replacement of negative electrode materials is relatively conservative. At present, the negative electrode materials of lithium ion batteries mainly include various carbon materials (carbon fibers, graphene, carbon nanotubes, etc.), transition metal oxides, transition metal nitrides, and sulfides. and alloy materials, etc. Among them, the theoretical lithium storage capacity of transition metal oxides is about 2 to 3 times that of carbon materials. At the same time, the preparation of transition metal oxid...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/50H01M4/52H01M10/0525C01G53/00
CPCH01M4/523H01M4/502H01M4/483H01M10/0525C01G53/006H01M2004/021H01M2004/027C01P2002/72C01P2004/03C01P2002/32C01P2006/12C01P2004/64Y02E60/10
Inventor 冒爱琴项厚政宋雅欣王捷郑翠红俞海云
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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