Preparation method of sodium ion battery layered and tunnel composite structure manganese-based anode material

A sodium-ion battery and composite structure technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of positive electrode material cycle and poor rate performance, and achieve easy large-scale production, excellent cycle and rate performance, and process The effect of simple process

Active Publication Date: 2015-12-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of the existing P2 type layered manganese-based sodium-ion battery cathode materials such as poor cycle and rate performance, and to provide a preparation w

Method used

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  • Preparation method of sodium ion battery layered and tunnel composite structure manganese-based anode material
  • Preparation method of sodium ion battery layered and tunnel composite structure manganese-based anode material
  • Preparation method of sodium ion battery layered and tunnel composite structure manganese-based anode material

Examples

Experimental program
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Example Embodiment

[0032] Example 1

[0033] Add 6.858g sodium acetate trihydrate and 19.607g manganese acetate tetrahydrate into 200ml deionized water to obtain solution A. 20.171g of oxalic acid was dissolved in 100ml of deionized water to obtain solution B. At room temperature, add solution B dropwise to solution A while stirring, and stir for 3 hours after the reaction. Then the obtained turbid liquid was stirred in a water bath at 80°C, and after all the solvent in the turbid liquid was evaporated to dryness, it was transferred to an oven at 120°C and dried for 12 hours. Finally, the dried precursor was placed in a muffle furnace, pre-calcined at 450°C for 6h, and then calcined at 800°C for 15h, at a heating rate of 5°C / min. After the calcination, quenched with liquid nitrogen to obtain a layered tunnel Composite structure manganese-based material.

[0034] Add 25% conductive agent acetylene black and 5% adhesive polyvinylidene chlorofluoride (PVDF) to the synthesized material to make a slurr...

Example Embodiment

[0035] Example 2

[0036] Add 5.71 hydrated sodium acetate and 19.607g manganese acetate tetrahydrate to 200ml deionized water to obtain solution A. 20.171g of oxalic acid was dissolved in 100ml of deionized water to obtain solution B. At room temperature, add solution B dropwise to solution A while stirring, and stir for 3 hours after the reaction. Then the obtained turbid liquid was stirred in a water bath at 80°C, and after all the solvent in the turbid liquid was evaporated to dryness, it was transferred to an oven at 120°C and dried for 12 hours. Finally, the dried precursor was placed in a muffle furnace, pre-calcined at 450°C for 6h, and then calcined at 800°C for 15h, at a heating rate of 5°C / min. After the calcination, quenched with liquid nitrogen to obtain a layered tunnel Composite structure manganese-based material.

Example Embodiment

[0037] Example 3

[0038] Add 6.287 hydrated sodium acetate and 19.607g manganese acetate tetrahydrate to 200ml deionized water to obtain solution A. 20.171g of oxalic acid was dissolved in 100ml of deionized water to obtain solution B. At room temperature, add solution B dropwise to solution A while stirring, and stir for 3 hours after the reaction. Then the obtained turbid liquid was stirred in a water bath at 80°C, and after all the solvent in the turbid liquid was evaporated to dryness, it was transferred to an oven at 120°C and dried for 12 hours. Finally, the dried precursor was placed in a muffle furnace, pre-calcined at 450°C for 6h, and then calcined at 800°C for 15h, at a heating rate of 5°C / min. After the calcination, quenched with liquid nitrogen to obtain a layered tunnel Composite structure manganese-based material.

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Abstract

The invention relates to a preparation method of a sodium ion battery layered and tunnel composite structure manganese-based anode material and relates to a sodium ion battery anode material. The preparation method of the sodium ion battery layered and tunnel composite structure manganese-based anode material which has the advantages of being high in capacity, excellent in circulating performance and rate performance, easy to operate, low in cost and the like is provided. The preparation method includes the steps that firstly, sodium salt and manganese salt are dissolved in deionized water to obtain a solution A; secondly, a precipitant is dissolved in deionized water to obtained a solution B; thirdly, the solution B is added in the solution A, remaining solvents are evaporated to be dry after stirring, obtained precursors are dried, roasted and quenched, and then the layered and tunnel composite structure manganese-based anode material of the sodium ion battery is obtained. By means of the advantage that a P2-type layered structure and a tunnel structure are integrated through structure compositing, the sodium ion battery anode material which is high in specific capacity and excellent in circulating performance and rate performance is obtained.

Description

technical field [0001] The invention relates to a positive electrode material for a sodium ion battery, in particular to a method for preparing a manganese-based positive electrode material for a sodium battery with a layered-tunnel composite structure with high capacity and high rate performance. The layered material is prepared by co-precipitation and high-temperature calcination. -Tunnel structure manganese-based cathode material. Background technique [0002] With the increasing consumption of fossil fuels and environmental pollution, the utilization of renewable energy (wind energy, solar energy, tidal energy, etc.) has attracted more and more attention, and the development of large-scale energy storage technology has also attracted more and more attention. At present, lithium-ion batteries have been successfully applied in the field of energy storage, but the reserves of lithium resources are limited and unevenly distributed, and the high cost of lithium-ion batteries ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M10/054H01M4/139
CPCH01M4/139H01M4/362H01M4/366H01M4/505H01M10/054Y02E60/10
Inventor 李君涛吴振国孙世刚钟本和黄令郭孝东
Owner XIAMEN UNIV
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