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Preparation method of ternary layered positive electrode material for sodium ion battery

A sodium-ion battery and ternary layered technology, applied in the field of materials science, can solve the problems of complex process, environmental pollution, a large amount of waste water, etc., and achieve the effect of simple preparation process and environmental friendliness

Active Publication Date: 2018-09-14
浙江钠创新能源有限公司
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  • Abstract
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Problems solved by technology

[0005] In view of the above technical problems in the prior art, the invention provides a method for preparing a ternary layered positive electrode material for a sodium ion battery, the preparation method of the ternary layered positive electrode material for a sodium ion battery needs to solve In the prior art, the process of preparing ternary layered positive electrode materials for sodium-ion batteries is complicated, and at the same time, a large amount of waste water will be generated, which will pollute the technical problems of the environment.

Method used

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  • Preparation method of ternary layered positive electrode material for sodium ion battery
  • Preparation method of ternary layered positive electrode material for sodium ion battery
  • Preparation method of ternary layered positive electrode material for sodium ion battery

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preparation example Construction

[0070] Battery preparation and electrochemical performance testing methods

[0071] 1. Preparation of battery cathode sheet

[0072] The obtained sodium ion battery cathode material NaMn 1-x-y Fe x Ni y o 2 (0<x<0.5, 0<y<0.5), conductive carbon powder, and organic binder polyvinylidene fluoride (PVDF) are mixed in a ratio of 8:1:1 to obtain a mixture, and the mixed powder is added to N -Methylpyrrolidone (NMP), fully stirred to form a slurry, coated on the surface of aluminum foil, dried, and rolled several times to obtain the desired battery positive sheet.

[0073] 2. Battery assembly and performance testing

[0074] Evaluation of the obtained sodium-ion battery cathode material NaMn with a 2016-type half-cell 1-x-y Fe x Ni y o 2 (01-x-y Fe x Ni y o 2 (0<x<0.5, 0<y<0.5) mass, using glass fiber as separator, metal sodium sheet as negative electrode, assembled in a glove box as a testable battery.

[0075] 3. Electrochemical performance test

[0076] The specific...

Embodiment 1

[0078] A preparation method of a ternary layered positive electrode material for a sodium ion battery, the raw materials used in the preparation process are calculated according to the mass fraction, and its composition and content are as follows:

[0079]

[0080] Its preparation method specifically comprises the following steps:

[0081] (1) weigh sodium carbonate by above mass ratio, manganese monoxide, iron oxide and nickel oxide raw material;

[0082] (2) Mix the weighed raw materials together, add a small amount of deionized water to make the solid content 30%, and stir evenly;

[0083] (3) adding (2) gained mixture to ball milling in the ball mill, the ball mill rotating speed is 2500r / min, after the ball milling 40min, the gained material after the ball milling;

[0084] (4) Spray the material obtained in (3), and then collect the material obtained by spraying, which is the precursor;

[0085] (5) The precursor obtained in (4) was calcined in air at 900°C for 12 h...

Embodiment 2

[0089] A preparation method of a ternary layered positive electrode material for a sodium ion battery, the raw materials used in the preparation process are calculated according to the mass fraction, and its composition and content are as follows:

[0090]

[0091] Its preparation method specifically comprises the following steps:

[0092] (1) weigh sodium carbonate by above mass ratio, manganese monoxide, iron oxide and nickel oxide raw material;

[0093] (2) Mix the weighed raw materials together, add a small amount of deionized water to make the solid content 30%, and stir evenly;

[0094] (3) adding (2) gained mixture to ball milling in the ball mill, the ball mill rotating speed is 2500r / min, after the ball milling 40min, the gained material after the ball milling;

[0095] (4) Spray the material obtained in (3), and then collect the material obtained by spraying, which is the precursor;

[0096] (5) The precursor obtained in (4) was calcined at 900°C in air for 12 h...

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Abstract

The invention provides a preparation method of ternary layered positive electrode material for a sodium ion battery. The preparation method comprises the following steps: mixing sodium carbonate, manganese monoxide, ferrous oxide and nickel oxide according to a given ratio, adding deionized water, preparing the mixture slurry with a solid content of 30 to 45 percent, ball milling, obtaining a uniformly-mixed raw material with small particles, obtaining a precursor in an atomizing manner, wherein the precursor consists of spherical particles formed by clustering small particles, calcining the spherical particles at high temperature, preserving the heat for a given time, cooling, and obtaining the needed NaMn1-x-yFexNiyO2(x is greater than 0 and less than 0.5, and y is greater than 0 and less than 0.5) positive electrode material. The ternary layered positive electrode material for the sodium ion battery synthesized in the invention has the spherical particle appearance characteristic and nano porous internal structure, so that the transport distance of the sodium ions between the interior of a material lattice and electrolyte can be reduced, and the electrochemical performance of the material can be improved.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a battery, in particular to a preparation method of a ternary layered cathode material for a sodium ion battery. Background technique [0002] The rapid development of society has improved people's living conditions, but at the same time it has also brought difficulties to the sustainable development of human beings, such as the massive consumption of fossil fuels, which makes it impossible to meet the long-term supply and also causes serious pollution to the environment. In order to enable future generations to still have energy available for use in the future, the development of technologies such as wind energy, water energy, solar energy, and tidal energy are constantly being proposed to solve the problem of insufficient supply of fossil energy. With the development of these technologies, energy storage technology is becoming more and more important. Among the existing energy s...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/054
CPCH01M4/366H01M4/505H01M4/525H01M10/054Y02E60/10
Inventor 章冬云周江秦雯常程康王乃占乔金王蒙蒙杜利春
Owner 浙江钠创新能源有限公司
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