Preparation method and application of N-doped FeMnO3 electrode material

An electrode material, lithium-ion battery technology, applied in battery electrodes, circuits, electrical components, etc.

Active Publication Date: 2021-04-20
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, current research on N-doped FeMnO 3 The preparation of electrode materials and their application as anode materials for lithium-ion batteries have not been reported yet.

Method used

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  • Preparation method and application of N-doped FeMnO3 electrode material
  • Preparation method and application of N-doped FeMnO3 electrode material
  • Preparation method and application of N-doped FeMnO3 electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Take ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) and manganese sulfate monohydrate (MnSO 4 ·H 2 O) and mix, add an appropriate amount of distilled water to dissolve, so that the concentrations of iron ions and manganese ions in the iron-manganese mixed solution are both 0.10 mol / L.

[0020] (2) Measure 100 mL of the iron-manganese mixed solution obtained in step (1) and place it in a 500 mL reactor, add 200 mL of 2.67 mol / L ammonia solution dropwise to it while stirring at a constant temperature of 25 °C, and stir The speed is 350 rpm; after the ammonia water is added dropwise, the stirring reaction is continued for 3 hours, and the stirring is stopped; then the reactor is placed at room temperature and aged for 12 hours; finally, the precipitate is filtered, washed, and freeze-dried to obtain Precursor powder.

[0021] (3) Measure 15 mL of ethanol aqueous solution (the volume ratio of absolute ethanol to distilled water is 1:2), and add 0.1 g of the precursor...

Embodiment 2

[0024] (1) Take ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) and manganese sulfate monohydrate (MnSO 4 ·H 2 O) and mix, add an appropriate amount of distilled water to dissolve, so that the concentrations of iron ions and manganese ions in the iron-manganese mixed solution are both 0.10 mol / L.

[0025] (2) Measure 100 mL of the iron-manganese mixed solution obtained in step (1) and place it in a 500 mL reactor, add 200 mL of 2.67 mol / L ammonia solution dropwise to it while stirring at a constant temperature of 25 °C, and stir The speed is 350 rpm; after the ammonia water is added dropwise, the stirring reaction is continued for 3 hours, and the stirring is stopped; then the reactor is placed at room temperature and aged for 12 hours; finally, the precipitate is filtered, washed, and freeze-dried to obtain Precursor powder.

[0026] (3) Weigh 0.5 g of analytically pure NH 4 HCO 3 In 15 mL of ethanol aqueous solution (the volume ratio of absolute ethanol to distilled wate...

Embodiment 3

[0029] (1) Take ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) and manganese sulfate monohydrate (MnSO 4 ·H 2 O) and mix, add an appropriate amount of distilled water to dissolve, so that the concentrations of iron ions and manganese ions in the iron-manganese mixed solution are both 0.10 mol / L.

[0030](2) Measure 100 mL of the iron-manganese mixed solution obtained in step (1) and place it in a 500 mL reactor, add 200 mL of 2.67 mol / L ammonia solution dropwise to it while stirring at a constant temperature of 25 °C, and stir The speed is 350 rpm; after the ammonia water is added dropwise, the stirring reaction is continued for 3 hours, and the stirring is stopped; then the reactor is placed at room temperature and aged for 12 hours; finally, the precipitate is filtered, washed, and freeze-dried to obtain Precursor powder.

[0031] (3) Weigh 1.0 g of analytically pure NH 4 HCO 3 In 15 mL of ethanol aqueous solution (the volume ratio of absolute ethanol to distilled water...

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Abstract

The invention discloses a preparation method and application of an N-doped FeMnO3 electrode material. The preparation method comprises the following steps: Mixing ferrous sulfate heptahydrate and manganese sulfate monohydrate according to the molar ratio of iron to manganese of 1:1, adding distilled water for dissolving, and preparing an iron-manganese mixed solution; carrying out a coprecipitation reaction at a constant temperature of 25 DEG C by taking an ammonia water solution as a precipitant, and carrying out aging, filtering, washing and freeze-drying operations after the reaction is finished, so as to obtain a precursor; and weighing 0-1.5 g of analytically pure NH4HCO3, dissolving the analytically pure NH4HCO3 in 15 mL of an ethanol aqueous solution, adding 0.1 g of the precursor into the ethanol aqueous solution, uniformly stirring the mixture, transferring the mixture into a crucible, putting the crucible into a muffle furnace, and carrying out annealing treatment at 1000 DEG C to prepare the N-doped FeMnO3 electrode material. The N-doped FeMnO3 electrode material is applied to a lithium ion battery negative electrode material, the cycle performance and the rate capability of the N-doped FeMnO3 electrode material are remarkably superior to those of the FeMnO3 electrode material, and the N-doped FeMnO3 electrode material has very excellent lithium storage performance. The preparation method has the advantages of simple steps, easily available raw materials, low cost and easily controlled operation parameters, and is convenient for large-scale production.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery negative electrode materials, in particular to a high-performance N-doped FeMnO 3 Preparation method of electrode material and its application. Background technique [0002] With the increasing demand for electric vehicles, portable electronic devices and large-scale energy storage systems, the development of high-performance lithium-ion batteries with higher energy / power density, better safety, and lower cost has become an important trend in electrochemical energy storage. research hotspots in the field. The electrochemical properties of electrodes play a crucial role in the overall performance of Li-ion batteries. However, commercially widely used carbon-based anode materials have a low theoretical capacity (372 mAh / g) and pose safety concerns. FeMnO 3 It is a typical double-transition metal oxide, which has the advantages of high theoretical specific capacity (~1010 mAh / g), low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12H01M4/58H01M4/62H01M10/0525
CPCY02E60/10
Inventor 姚金环吴晶晶李延伟
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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