a mgmn 2 o 4 Nanofiber electrode material and preparation method thereof

A nanofiber and electrode material technology, applied in the field of MgMn2O4 nanofiber electrode material and its preparation, can solve the problems of short cycle life and low energy storage density of ion batteries, and achieve long cycle life, strong crystal structure stability, and crystallinity. high effect

Inactive Publication Date: 2020-05-12
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to solve the problems of low energy storage density and short cycle life of ion batteries, the present invention provides a MgMn 2 o 4 Nanofiber electrode material and preparation method thereof

Method used

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  • a mgmn <sub>2</sub> o <sub>4</sub> Nanofiber electrode material and preparation method thereof
  • a mgmn <sub>2</sub> o <sub>4</sub> Nanofiber electrode material and preparation method thereof
  • a mgmn <sub>2</sub> o <sub>4</sub> Nanofiber electrode material and preparation method thereof

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Effect test

Embodiment 1

[0036] Embodiment 1: a kind of MgMn of the present embodiment 2 o 4 The preparation method steps of nanofiber electrode material are as follows:

[0037] 1. Weigh 0.38g magnesium nitrate, 0.75g manganese nitrate and 1.67g ethylene glycol respectively, first fully dissolve magnesium nitrate in 5ml deionized water at room temperature to make magnesium nitrate solution, then fully dissolve manganese nitrate at room temperature Finally, add ethylene glycol to the above solution and stir at a speed of 400-600r / min for 20min to obtain salt solution A.

[0038] 2. Add a total amount of 1.2-1.8g of PVP in batches to 15mL of absolute ethanol, and fully stir at room temperature at a speed of 400-600r / min for 3h to obtain polymer solution B.

[0039] 3. At a stirring speed of 300-450r / min, slowly add the salt solution A to the polymer solution B dropwise, after all the dropping is completed, increase the stirring speed to 400-600r / min and continue stirring for 10-15h to obtain MgMn 2...

Embodiment 2

[0047] Embodiment 2: a kind of MgMn of the present embodiment 2 o 4 The preparation method steps of nanofiber electrode material are as follows:

[0048] 1. Weigh 0.38g magnesium nitrate, 0.75g manganese nitrate and 1.67g ethylene glycol respectively, first fully dissolve magnesium nitrate in 5ml deionized water at room temperature to make magnesium nitrate solution, then fully dissolve manganese nitrate at room temperature Finally, add ethylene glycol to the above solution and stir at 500r / min for 20min to obtain salt solution A.

[0049] 2. Add a total amount of 1.5 g of PVP in batches to 15 mL of absolute ethanol, and stir thoroughly at room temperature at a speed of 500 r / min for 3 h to obtain polymer solution B.

[0050] 3. Slowly add the salt solution A to the polymer solution B at a stirring speed of 350r / min. After all the addition is completed, increase the stirring speed to 500r / min and continue stirring for 12 hours to obtain MgMn 2 o 4 Spinning precursor soluti...

Embodiment 3

[0059] Embodiment 3: a kind of MgMn of this embodiment 2 o 4 The preparation method steps of nanofiber electrode material are as follows:

[0060] 1. Weigh 0.38g magnesium nitrate, 0.75g manganese nitrate and 1.67g ethylene glycol respectively, first fully dissolve magnesium nitrate in 5ml deionized water at room temperature to make magnesium nitrate solution, then fully dissolve manganese nitrate at room temperature Finally, add ethylene glycol to the above solution and stir at 550r / min for 20min to obtain salt solution A.

[0061] 2. Add a total amount of 1.6 g of PVP in batches to 15 mL of absolute ethanol, and stir at room temperature at a speed of 550 r / min for 3 h to obtain polymer solution B.

[0062] 3. Slowly add the salt solution A to the polymer solution B at a stirring speed of 400r / min. After all the addition is completed, increase the stirring speed to 550r / min and continue stirring for 11 hours to obtain MgMn 2 o 4 Spinning precursor solution C.

[0063] 4....

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Abstract

The invention belongs to the field of electrode materials and particularly relates to an MgMn2O4 nanofiber electrode material and a preparation method of the MgMn2O4 nanofiber electrode material. Themagnesium salt and the manganese salt are dissolved to prepare a salt solution A; the PVP (Polyvinyl Pyrrolidone) is dissolved to prepare a polymer solution B; the salt solution A and the polymer solution B are mixed to prepare an MgMn2O4 spinning precursor solution C; the MgMn2O4 spinning precursor solution C is prepared into an MgMn2O4 amorphous fiber membrane through the electrospinning technique; and finally the MgMn2O4 amorphous fiber membrane is calcined in a muffle furnace to obtain a crystallized MgMn2O4 nanofiber. The prepared MgMn2O4 nanofiber has a larger length-diameter ratio, hasa regular structure, and is excellent in charge-discharge stability and capacitive performance. The crystallinity of the prepared MgMn2O4 nanofiber is high, the stability of the crystal structure is strong, the cycle life is long, and using the MgMn2O4 nanofiber as the electrode material is favorable for improving the stability of the performance of a battery. The technology of the preparation method is simple, the raw materials and the equipment are cheap, and the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to a MgMn 2 o 4 Nanofiber electrode material and preparation method thereof. Background technique [0002] Due to the limited reserves of fossil energy such as petroleum, the demand for new energy sources in today's society is becoming more and more urgent, and the requirements for energy storage and cycle life of energy storage equipment are getting higher and higher. How to provide electrode materials with high energy storage density and long cycle life become the hot spot of current scientific research. At present, metal oxides are the most commonly used electrode materials, but most of the monolithic metal oxides have poor structural stability, and when they are used as electrode materials, the cycle life is short, so the electrode performance is poor. The double-salt oxide has good structural stability when used as an electrode material, which is conducive to improving the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10H01M4/505H01M10/0525H01G11/46H01G11/50B82Y30/00
CPCB82Y30/00D01F9/10H01G11/46H01G11/50H01M4/505H01M10/0525Y02E60/10
Inventor 迟庆国刘光张永泉张天栋张昌海王暄
Owner HARBIN UNIV OF SCI & TECH
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