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General preparing method for manganese-based lithium-ion battery electrode material of one-dimensional micro-nano structure with adjustable length-diameter ratio

A technology of structural manganese-based lithium and ion batteries, applied in battery electrodes, secondary batteries, structural parts, etc., can solve problems that have not been reported before, complex process conditions, etc., and achieve convenient operation, simple process, and excellent electrochemical performance Effect

Active Publication Date: 2016-06-08
HEFEI UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods require the use of a microemulsion system composed of surfactants or hydrothermal conditions of high temperature and high pressure, and the process conditions are relatively complicated, and there is no report on a general-purpose method that can synthesize a series of one-dimensional micro-nano structure manganese-based lithium-ion batteries. Electrode Material Method

Method used

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  • General preparing method for manganese-based lithium-ion battery electrode material of one-dimensional micro-nano structure with adjustable length-diameter ratio
  • General preparing method for manganese-based lithium-ion battery electrode material of one-dimensional micro-nano structure with adjustable length-diameter ratio
  • General preparing method for manganese-based lithium-ion battery electrode material of one-dimensional micro-nano structure with adjustable length-diameter ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this example, a one-dimensional micro-nano structure manganese-based lithium-ion battery lithium-rich positive electrode material 0.5Li was prepared according to the following steps 2 MnO 3 0.5LiNi 1 / 3 mn 1 / 3 co 1 / 3 o 2 :

[0047] (1) At room temperature, dissolve 0.402g lithium acetate, 0.409g manganese acetate, 0.104g nickel acetate and 0.104g cobalt acetate in distilled water, then add ethanol and mix well to obtain a mixed metal salt solution;

[0048] (2) 0.570g oxalic acid is dissolved in the ethanol-water mixed solvent that is made of distilled water and ethanol, obtains oxalic acid solution;

[0049] (3) Pour the mixed metal salt solution into the oxalic acid solution to obtain a mixed reaction solution; stir the resulting mixed reaction solution for 6 hours until the reaction is complete to obtain MC 2 o 4 ·xH 2 O suspension (M is Li, Ni, Co, Mn);

[0050] (4) In the air, the MC 2 o 4 ·xH 2 The O suspension was evaporated to dryness at 80 °C to o...

Embodiment 2

[0060] In this example, a one-dimensional micro-nano structure lithium-ion battery lithium-rich positive electrode material 0.5Li is prepared according to the following steps 2 MnO 3 0.5LiNi 0.5 mn 0.5 o 2 :

[0061] (1) At room temperature, dissolve 0.402g of lithium acetate, 0.460g of manganese acetate and 0.156g of nickel acetate in 10mL of distilled water, then add 40mL of ethanol and mix well to obtain a mixed metal salt solution;

[0062] (2) 0.570g oxalic acid is dissolved in the ethanol-water mixed solvent that is made of 10mL distilled water and 40mL ethanol, obtains oxalic acid solution;

[0063] (3) Pour the mixed metal salt solution into the oxalic acid solution to obtain a mixed reaction solution; stir the resulting mixed reaction solution for 6 hours until the reaction is complete to obtain MC 2 o 4 ·xH 2 O suspension (M is Li, Ni, Mn);

[0064] (4) In the air, the MC 2 o 4 ·xH 2 The O suspension was evaporated to dryness at 80 °C to obtain MC 2 o 4 ...

Embodiment 3

[0072] In this example, the one-dimensional micro-nano structure Li-ion battery ternary positive electrode material LiNi is prepared according to the following steps: 1 / 3 co 1 / 3 mn 1 / 3 o 2 :

[0073] (1) At room temperature, dissolve 0.536g of lithium acetate, 0.409g of manganese acetate, 0.415g of nickel acetate and 0.415g of cobalt acetate in 10mL of distilled water, then add 40mL of ethanol and mix well to obtain a mixed metal salt solution;

[0074] (2) 0.970g oxalic acid is dissolved in the ethanol-water mixed solvent that is made of 10mL distilled water and 40mL ethanol, obtains oxalic acid solution;

[0075] (3) Pour the mixed metal salt solution into the oxalic acid solution to obtain a mixed reaction solution; stir the resulting mixed reaction solution for 6 hours until the reaction is complete to obtain MC 2 o 4 ·xH 2 O suspension (M is Li, Ni, Co, Mn);

[0076] (4) In the air, the MC 2 o 4 ·xH 2 The O suspension was evaporated to dryness at 80 °C to obtain...

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Abstract

The invention discloses a general preparing method for a manganese-based lithium-ion battery electrode material of a one-dimensional micro-nano structure with the adjustable length-diameter ratio. The general preparing method is characterized in that soluble metal M salt is used as a raw material (M is a mixture of Mn and at least one of Li, Ni, Co, Al and Zn), oxalic acid is used as precipitant, a coprecipitation reaction is adopted in an ethyl alcohol-water mixed solvent system to prepare an oxalate rodlike precursor, and the precursor is roasted in air atmosphere to obtain the uniform-morphology and monodispersed manganese-based lithium-ion battery electrode material of the one-dimensional micro-nano structure; the length-diameter ratio of the electrode material can be adjusted by adjusting the volume ratio of ethyl alcohol to water in the ethyl alcohol-water mixed solvent system. A series of electrode materials high in energy density and power density can be prepared through the method, and the preparing method is high in generality. The method is simple in process, convenient to operate, environmentally friendly as reaction solvent can be recovered and reused and easy to industrially enlarge.

Description

technical field [0001] The invention relates to a general preparation method of a chemical power electrode material, in particular to synthesizing a one-dimensional micro-nano structure manganese-based lithium-ion battery electrode material with an adjustable aspect ratio, belonging to the technical field of lithium-ion batteries. Background technique [0002] Lithium-ion batteries can efficiently convert and store energy, and have become a key technology in the development of energy storage fields. Due to their high operating voltage, high energy density, no memory effect, and long service life, they are widely used in various fields. focus on. With the continuous progress of human society, portable electronic products tend to be miniaturized and lightweight, especially with the rapid development of electric vehicles and grid energy storage, commercialized lithium cobalt oxide electrode materials can no longer meet the needs of power and energy storage lithium ion battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M10/0525
CPCH01M4/505H01M10/0525Y02E60/10
Inventor 杨则恒刘树林李昇马国张卫新方立贵谢中平王长平曹宗元陆剑波马紫峰杨扬
Owner HEFEI UNIV OF TECH