A kind of preparation method of sodium manganese oxide

A technology of sodium manganese oxide and hydroxide, which is applied in the direction of manganese compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of unfavorable large-scale industrial production, etc., to improve specific surface area and surface activity, and improve charge and discharge performance, performance-enhancing effects
CN103896339BActive Publication Date: 2016-08-24紫石能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
紫石能源有限公司
Publication Date
2016-08-24

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Abstract

The invention relates to a preparation method of a sodium manganese oxide, and particularly relates to a preparation method of a layered birnessite type sodium manganese oxide. The preparation method is as follows: reacting a two valent manganese salt with sodium hydroxide in an aqueous phase to obtain a Mn (OH)2 precipitate and / or MnOOH precipitate-containing suspension, then performing solvent evaporation to obtain a MnOOH precipitate and / or Mn (OH) 2 precipitate-containing mixture; grinding the mixture, and sintering at 600-1200 DEG C to obtain a sintering product; then performing washing and solid-liquid separation for multiple times, and finally drying to obtain a final product. According to the preparation method, molecular level mixing of manganese hydroxide and a sodium salt can be realized by a solution chemical reaction method, promotion of next-step solid phase reaction is facilitated, improvement of the purity of the product is facilitated, and the prepared sodium manganese compound can be used in a sodium ion battery using an aqueous solution as an electrolyte, and helps to improve the charge discharge performance of the battery.
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Description

technical field

[0001] The invention relates to a preparation method of sodium manganese oxide, in particular to a preparation method of layered birnessite type sodium manganese oxide. The invention also relates to a sodium ion battery. Background technique

[0002] Layered birnessite (Birnessite) sodium manganese oxide usually has a two-dimensional layered structure, in which each layer is composed of manganese-oxygen octahedra MnO 6 Composition, the interlayer is composed of H 2 O, Na + (or other metal ions) occupy the filling; the layer spacing is about 0.7nm, which varies with the metal ions and water content. Based on the characteristics of layered crystal structure, layered Birnessite sodium manganese oxide is suitable for use as electrode material, ion exchange material, adsorption material, pollutant treatment material and catalyst.

[0003] In recent years, along with the rapid development of wind power and photovoltaic power generation, new breakthroughs in meg...

Claims

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