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Preparation method of anode material for sodium-ion batteries

A sodium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor structure and thermal stability, low voltage platform, etc. The method is simple, repeatable, and operable Effect

Inactive Publication Date: 2016-07-27
DONGGUAN MCNAIR NEW POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mono- or binary layered transition metal oxides have high theoretical capacity, but low voltage plateau, poor structure and thermal stability

Method used

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  • Preparation method of anode material for sodium-ion batteries
  • Preparation method of anode material for sodium-ion batteries
  • Preparation method of anode material for sodium-ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a Na(Ni 0.33 Fe 0.33 mn 0.33 )O 2 The preparation method of material comprises the following steps:

[0034] The first step, the preparation of nickel, iron, manganese solution: dissolve 8.17g manganese acetate, 8.29g nickel acetate, 5.06g ferrous sulfate in 250g deionized water, stir and dissolve evenly, obtain salt solution;

[0035] The second step, the preparation of the precursor gel: add dropwise 500 g of citric acid solution with a concentration of 0.1 g / mL to the salt solution prepared in the first step, react in a water bath at 40°C for 2 hours, adjust the pH to 5.5 with ammonia water, and The temperature was raised to 70°C and reacted for 8 hours to obtain a wet gel;

[0036] The third step, preparation of the positive electrode material: dry the wet gel obtained in the second step at 100°C for 10 hours, mix the dried product with 5.51g of sodium carbonate, ball mill for 2 hours, and then calcinate in air at 450°C for 4 hours, Tak...

Embodiment 2

[0040] This embodiment provides a Na(Ni 0.4 Fe 0.2 mn 0.4 )O 2 The preparation method of material comprises the following steps:

[0041] The first step, the preparation of nickel, iron, manganese solution: dissolve 11.15g manganese nitrate, 6.46g nickel nitrate, 6.75g ferrous sulfate in 250g deionized water, stir and dissolve evenly, obtain salt solution;

[0042] The second step, preparation of the precursor gel: 500 g of citric acid solution with a concentration of 0.3 g / mL was added dropwise to the salt solution prepared in the first step, and reacted in a water bath at 35° C. for 3.5 hours. Adjust the pH to 5.2 with ammonia water, raise the temperature of the water bath to 80°C, and react for 6 hours to obtain a wet gel;

[0043] The third step, preparation of positive electrode material: dry the wet gel obtained in the second step at 110°C for 10 hours, mix the dried product with 5.51g of sodium carbonate, ball mill for 2 hours, and then calcinate at 500°C in air for...

Embodiment 3

[0046] This embodiment provides a Na(Ni 0.2 Fe 0.5 mn 0.3 )O 2 The preparation method of material comprises the following steps:

[0047] The first step, the preparation of nickel, iron, manganese solution: dissolve 8.17g manganese acetate, 5.53g nickel acetate, 7.03g ferrous sulfate in 250g deionized water, stir and dissolve evenly, obtain salt solution;

[0048] The second step, preparation of the precursor gel: 500 g of citric acid solution with a concentration of 0.5 g / mL was added dropwise to the salt solution prepared in the first step, and reacted in a water bath at 45° C. for 2 hours. Adjust the pH to 6.0 with ammonia water, raise the temperature of the water bath to 70°C, and react for 15 hours to obtain a wet gel;

[0049] The third step, preparation of positive electrode material: dry the wet gel obtained in the second step at 90°C for 15 hours, mix the dried product with 5.51g of sodium carbonate, ball mill for 2 hours, and then calcinate at 450°C in air for 7 ...

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Abstract

The invention belongs to the technical field of battery materials and particularly relates to a preparation method of an anode material for sodium-ion batteries. The preparation method includes the steps of preparing a nickel solution, a ferric solution and a manganese solution, preparing precursor gels and preparing the anode material. Compared with the prior art, the preparation method has the advantages that the Na(NixFeyMn1-x-y)O2 anode material is prepared by a sol-gel method and refers to an O3-type crystal; structural stability and cycling stability of the Na(NixFeyMn1-x-y)O2 anode material can be enhanced, distribution uniformity of various metal ions inside the Na(NixFeyMn1-x-y)O2 anode material is enhanced, sodium-storing specific capacity of the Na(NixFeyMn1-x-y)O2 anode material is increased, and accordingly a research thought is provided for seeking novel anode materials for the sodium-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a preparation method of a positive electrode material of a sodium ion battery. Background technique [0002] The excessive consumption of fossil fuels and the environmental problems they bring have prompted the widespread application of new energy sources. However, how to stably and safely integrate intermittently generated new energy into the grid is a key issue. Therefore, large-scale use of secondary batteries with high energy density, high conversion efficiency, and simple maintenance to store and regulate intermittent energy is currently the best solution to realize the intelligent operation of the power grid. The reserves of sodium in the earth are 4 to 5 orders of magnitude higher than that of lithium. Therefore, replacing lithium with sodium can alleviate the problem of shortage of lithium resources. Sodium and lithium are the same main group eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/1391H01M10/36
CPCH01M4/1391H01M4/505H01M4/525H01M10/36Y02E60/10
Inventor 孙淼宋晓娜周训富庞佩佩黄云辉邓耀明石海敏赵付双刘继策张嘉玲麦立强汪国秀侴术雷
Owner DONGGUAN MCNAIR NEW POWER
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