Spinel type high-entropy oxide electrode material and preparation method thereof

A spinel-type, electrode material technology, applied in the direction of active material electrodes, negative electrodes, battery electrodes, etc., can solve problems that have not been seen yet, and achieve the effect of simple method, high specific capacity, and convenient operation

Active Publication Date: 2019-10-22
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on high-entropy oxide (FeCoNiCrMn)O, (FeZnNiCrMn)O, (FeCoZnCrMn)O, (FeCoNiCrMnCu)O electrode materials used as lithium-ion battery anode materials

Method used

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  • Spinel type high-entropy oxide electrode material and preparation method thereof
  • Spinel type high-entropy oxide electrode material and preparation method thereof
  • Spinel type high-entropy oxide electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]The (FeCoNiCrMn)O high-entropy oxide electrode material of the present invention is compounded by mixing raw materials, heat treatment and cooling, the particle diameter is 100-500nm, and the space group of the material is Fd-3m.

[0036] The battery negative electrode material prepared in this example is tested at 50~2000mA g in the lithium-ion battery half-cell test. -1 Under the current density, the reversible capacity of the first charge is 100~690mAh g -1 , after 200 cycles, the capacity is 390~400mAhg -1 . exhibited excellent electrochemical performance.

[0037] A method for preparing a spinel type high-entropy oxide electrode material, comprising the steps of:

[0038] Step 1: Weigh Fe with a purity of 98.8% 2 o 3 (0.005mol, 0.808g), 99% Co 3 o 4 (0.0033mol, 0.803g), 99.3% Ni 2 o 3 (0.005mol, 0.833g), 99% Cr 2 o 3 (0.005mol, 0.768g) and 90% MnO 2 (0.01mol, 0.966g), pack ZrO 2 in the ball mill jar;

[0039] Step 2: Continuous ball milling at 250r / min...

Embodiment 2

[0043] The (FeCoNiCrMn)O high-entropy oxide material of the present invention is compounded by mixing raw materials, heat treatment and cooling, the particle diameter is 100-500nm, and the space group of the material is Fd-3m.

[0044] The battery negative electrode material prepared in this example is tested at 50~2000mA g in the lithium-ion battery half-cell test. -1 Under the current density, the first charge reversible capacity is 120~700mAh g -1 , after 200 cycles, the capacity is 390~400mAhg -1 . exhibited excellent electrochemical performance.

[0045] A method for preparing a spinel type high-entropy oxide electrode material, comprising the steps of:

[0046] Step 1: Weigh Fe with a purity of 98.8% 2 o 3 (0.005mol, 0.808g), 99% Co 3 o 4 (0.0033mol, 0.803g), 99.3% Ni 2 o 3 (0.005mol, 0.833g), 99% Cr 2 o 3 (0.005mol, 0.768g) and 90% MnO 2 (0.01mol, 0.966g), pack ZrO 2 in the ball mill jar;

[0047] Step 2: Continuous ball milling at 250r / min for 2 hours to ...

Embodiment 3

[0051] The (FeCoNiCrMn)O high-entropy oxide electrode material of the present invention is compounded by mixing raw materials, heat treatment and cooling, the particle diameter is 100-500nm, and the space group of the material is Fd-3m.

[0052] The battery negative electrode material prepared in this example is tested at 50~2000mA g in the lithium-ion battery half-cell test. -1 Under the current density, the first charge reversible capacity is 200~740mAh g -1 , after 200 cycles, the capacity is 360~380mAhg -1 . exhibited excellent electrochemical performance.

[0053] A method for preparing a spinel type high-entropy oxide electrode material, comprising the steps of:

[0054] Step 1: Weigh Fe with a purity of 98.8% 2 o 3 (0.005mol, 0.808g), 99% Co 3 o 4 (0.0033mol, 0.803g), 99.3% Ni 2 o 3 (0.005mol, 0.833g), 99% Cr 2 o 3 (0.005mol, 0.768g) and 90% MnO 2 (0.01mol, 0.966g), pack ZrO 2 in the ball mill jar;

[0055] Step 2: Continuous ball milling at 250r / min for 2...

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Abstract

The invention relates to a spinel type high-entropy oxide electrode material and a preparation method thereof, and belongs to the field of nanomaterial preparation and new energy. The chemical formulaof the high-entropy oxide electrode material is one of (FeCoNiCrMn)O, (FeZnNiCrMn)O, (FeCoZnCrMn)O and (FeCoNiCrMnCu)O. The preparation method includes the steps of 1) mixing and ball-milling iron oxide, chromium oxide, manganese oxide and M metal oxide, wherein the M metal oxide is two or more of nickel oxide, zinc oxide, copper oxide and cobalt oxide; and 2) carrying out high-temperature calcination, and obtaining the spinel type high-entropy oxide electrode material by adopting a cooling mode of furnace cooling, air quenching and liquid nitrogen quenching. The particle diameter of the high-entropy oxide is 100-500nm, and the high-entropy oxide is determined to be in a spinel structure according to XRD; and the space group of the material is Fd-3m, and the specific surface area is 5-100m<2>g<-1>.

Description

technical field [0001] The invention belongs to the field of nano-material preparation and new energy, and mainly relates to a spinel-type high-entropy oxide electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have always occupied an important position in the commercial market because of their many excellent characteristics. However, in recent years, with the continuous evolution of mobile electronic devices, the rapid development of sustainable energy supply systems, and the increasing popularity of new energy vehicles, people have more and more requirements on the energy density, power density, and cycle life of lithium-ion batteries. high. The negative electrode material is one of the key factors that determine the overall performance of lithium-ion batteries. However, the mainstream carbon negative electrode materials currently on the market have low actual specific capacity (about 300mAh / g~330mAh / g, and the theoretic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/50H01M4/52H01M4/131H01M10/0525
CPCH01M4/131H01M4/362H01M4/483H01M4/502H01M4/523H01M10/0525H01M2004/027Y02E60/10
Inventor 王丹齐西伟董莹罗绍华王志远
Owner 东北大学秦皇岛分校
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