Hydrothermal synthesis method of sodium ferromanganate used as electrode material of aqueous cation battery and preparation method of aqueous battery

A battery electrode, sodium iron manganate technology, applied in the field of hydrothermal synthesis, can solve problems such as poor safety, high cost, toxicity, etc., and achieve the effects of low cost, low impedance and wide sources

Active Publication Date: 2015-12-30
HARBIN ENG UNIV
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  • Application Information

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Problems solved by technology

Organic electrolytes have the disadvantages of high cost, poor safety, and toxicity

Method used

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  • Hydrothermal synthesis method of sodium ferromanganate used as electrode material of aqueous cation battery and preparation method of aqueous battery
  • Hydrothermal synthesis method of sodium ferromanganate used as electrode material of aqueous cation battery and preparation method of aqueous battery
  • Hydrothermal synthesis method of sodium ferromanganate used as electrode material of aqueous cation battery and preparation method of aqueous battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) FeSO 4 , MnSO 4 According to the stoichiometric ratio of iron and manganese, 0.5mol / L solutions are prepared and mixed dropwise, and NH is added at the same time 4 HCO 3 And ethanol as a dispersant, vigorously stirred for 1h;

[0027] (2) Transfer the above mixed solution to a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction. The hydrothermal condition is 180°C for 12 hours, and the obtained precipitate is filtered, cleaned and dried;

[0028] (3) After drying the product and stoichiometric ratio of Na 2 CO3 Perform ball milling and mixing for 5 hours;

[0029] (4) Put the ball-milled mixture into a muffle furnace for pretreatment at 400°C for 6h and high-temperature calcination at 880°C for 24h to obtain the final product NFMO.

[0030] It can be seen from the XRD pattern that the characteristic peaks are sharp and there are no obvious impurity peaks, indicating that the crystallinity of the product is intact and the purity is hi...

Embodiment 2

[0032] Change the hydrothermal condition of Example 1(2) to 150° C. for 12 hours. The rest of the synthesis conditions remain unchanged.

Embodiment 3

[0034] Example 1 (4) was changed to put the ball-milled mixture into a muffle furnace for pretreatment at 400°C for 6h and high-temperature calcination at 800°C for 24h to obtain the final product NFMO. The rest of the synthesis conditions remain unchanged.

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Abstract

The invention provides a hydro-thermal synthesizing method for iron sodium manganate of an electrode material of an aqueous cationic battery and a preparation method of the aqueous battery. The method provided by the invention comprises the following steps of: (1) preparing an iron-sourced compound and a manganese-sourced compound into 0.5 mol / L of solution, mutually mixing, simultaneously, adding ammonium bicarbonate and ethanol as dispersing agents, and strongly stirring for 1 h; (2) transferring the mixed solution obtained in the step (1) into a reaction kettle to carry out hydro-thermal reaction, and carrying out suction filtration, cleaning and drying on the obtained precipitate; (3) ball-milling and mixing the dried product and a sodium-sourced compound in the stoichiometric ratio for 3-10 h; and (4) putting the ball-milled mixture into a muffle to be pre-processed and roasted at high temperature to obtain a final product Na0.3Fe0.5Mn0.5O2, NFMO for short. Electrochemical tests prove that the electrode material provided by the invention is maximally up to 340 mAh / g in 1 mol / L of Na2SO4 electrolyte and is maximally up to 250 mAh / g in 1 mol / L of MgC12 electrolyte under 10 mA / g of current density; the electrode material is wide in raw material and easy to prepare; and the aqueous electrolyte is low in cost, environment-friendly and non-toxic.

Description

technical field [0001] The present invention relates to a method for preparing electrode materials for water-based cation batteries, in particular to a novel electrode material, sodium ferromanganate Na, which uses water-based electrolytes and can be used for deintercalation of multivalent cations. 0.3 Fe 0.5 mn 0.5 o 2 hydrothermal synthesis method. Background technique [0002] The world today is facing increasingly serious energy crisis and environmental problems, so the development of recyclable green and clean energy has become an important topic in the world today. Due to its high energy density, lithium-ion batteries have been successfully commercialized in the field of portable electronic products. However, the earth's lithium resources are limited, and the large demand for metal lithium in industrial lithium batteries has caused the price of metal lithium to rise. Cost has gradually become a key factor in the development of lithium-ion batteries. As one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00H01M4/1391
CPCY02E60/10
Inventor 曹殿学张莹杜孟孟程魁叶克王贵领
Owner HARBIN ENG UNIV
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