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Bimetallic oxide anode material of lithium ion battery, and preparation method and application thereof

A bimetallic oxide, lithium-ion battery technology, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve problems such as general electrochemical performance

Inactive Publication Date: 2021-06-15
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, such as the invention patent with the publication number CN110040787A, the metal salt is mixed with urea and ammonium chloride for hydrothermal reaction to prepare FeCo 2 o 4 electrode material, but the specific capacity of the prepared electrode material is only 1080.7F / g, and its electrochemical performance is relatively general

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  • Bimetallic oxide anode material of lithium ion battery, and preparation method and application thereof
  • Bimetallic oxide anode material of lithium ion battery, and preparation method and application thereof
  • Bimetallic oxide anode material of lithium ion battery, and preparation method and application thereof

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preparation example Construction

[0044] The present invention provides a kind of preparation method of double metal oxide anode material of lithium ion battery, comprises the following steps:

[0045] (1) Mix the metal salt, 2-methylimidazole and methanol, and perform a solvothermal reaction to obtain a precursor;

[0046] (2) Calcining the precursor obtained in the step (1) to obtain a double metal oxide anode material.

[0047] Unless otherwise specified, the present invention has no special limitation on the source of each component, and commercially available products well known to those skilled in the art can be used.

[0048] The invention mixes metal salt, 2-methylimidazole and methanol, and performs solvothermal reaction to obtain a precursor.

[0049] In the present invention, the metal salt preferably includes two of cobalt salt, iron salt, nickel salt and zinc salt, more preferably cobalt salt and iron salt. In the present invention, the metal salt is used to provide metal cations. In the presen...

Embodiment 1

[0070] (1) Dissolve 0.012mol of 2-methylimidazole in 20mL of methanol (the volume ratio of 2-methylimidazole to methanol is 1mmol:1.67mL), stir at 25°C and 200rpm for 30min to obtain solution A ;

[0071] (2) Dissolve 0.001mol ferric nitrate nonahydrate and 0.002mol cobalt nitrate hexahydrate in 20mL methanol (the ratio of the amount of iron nitrate nonahydrate and cobalt nitrate hexahydrate is 1:2, ferric nitrate nonahydrate and cobalt nitrate hexahydrate The volume ratio of the sum of the amount of cobalt nitrate to methanol is 1mmol:6.67mL, the ratio of the sum of the amount of matter of ferric nitrate nonahydrate and cobalt nitrate hexahydrate to the amount of 2-methylimidazole is 1:4 ), stirred at 25°C and 200rpm for 30min to obtain solution B;

[0072] (3) Mix solution A and solution B, and stir at 25°C and 200 rpm for 30 minutes to obtain solution C;

[0073] (4) Pour the solution C into the reaction kettle, react at 180°C for 24h, filter, wash with methanol for 3 tim...

Embodiment 2

[0076] (1) Dissolve 0.012mol of 2-methylimidazole in 20mL of methanol (the volume ratio of 2-methylimidazole to methanol is 1mmol:1.67mL), stir at 25°C and 200rpm for 30min to obtain solution A ;

[0077] (2) Dissolve 0.001mol ferric nitrate nonahydrate and 0.002mol cobalt nitrate hexahydrate in 20mL methanol (the ratio of the amount of iron nitrate nonahydrate and cobalt nitrate hexahydrate is 1:2, ferric nitrate nonahydrate and cobalt nitrate hexahydrate The volume ratio of the sum of the amount of cobalt nitrate to methanol is 1mmol:6.67mL, the ratio of the sum of the amount of matter of ferric nitrate nonahydrate and cobalt nitrate hexahydrate to the amount of 2-methylimidazole is 1:4 ), stirred at 25°C and 200rpm for 30min to obtain solution B;

[0078] (3) Mix solution A and solution B, and stir at 25°C and 200 rpm for 30 minutes to obtain solution C;

[0079] (4) Pour the solution C into the reaction kettle, react at 180°C for 24h, filter, wash with methanol for 3 tim...

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Abstract

The invention provides a bimetal oxide anode material of a lithium ion battery, and a preparation method and application thereof, and belongs to the technical field of electrode materials. The preparation method comprises the following steps: mixing metal salt, 2-methylimidazole and methanol, and carrying out solvothermal reaction to obtain a precursor; and calcining the precursor to obtain the bimetallic oxide anode material. According to the invention, 2-methylimidazole is coordinated with metal ions, so that the morphology, structure and size of the precursor can be regulated and controlled, the metal ions can be more uniformly precipitated on an organic framework, nanoparticles with smaller size and more uniform distribution are obtained after calcination, and the electrochemical performance of the product is further improved. The result of the embodiment shows that the first discharge specific capacity of the prepared bimetallic oxide anode material reaches 1602.2 mAh / g within the range of 0.01-3 V, the first charge specific capacity is 1254.1 mAh / g, and the first coulombic efficiency reaches 78.27%.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a double metal oxide anode material for a lithium ion battery and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have become extremely important power sources in portable electronic devices and new energy fields such as electric vehicles, hybrid electric vehicles and plug-in hybrid electric vehicles. In recent years, spinel-type binary transition metal oxides (TMOs) have been widely used as alternative anode materials for future lithium-ion batteries (LIBs) due to their high capacity, high electrochemical activity, and unique synergistic effect. Research. [0003] Bimetallic oxides are superior electrode materials because they provide more abundant electrochemically active sites and more redox reaction pairs than single components. In the prior art, such as the invention patent with the publication number CN11004078...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M10/0525
CPCH01M4/52H01M10/0525Y02E60/10
Inventor 赵桃林孟瑜申建钢
Owner SHIJIAZHUANG TIEDAO UNIV