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Preparation and application of natural vegetable oil modified MOF structure polyoxides

A vegetable oil and oxide technology, applied in structural parts, electrical components, electrochemical generators, etc., can solve the problems of poor cycle stability, rate performance, significant volume expansion effect, low first coulomb efficiency, etc. Poor performance and cycle performance, easy to implement and control, enhance the effect of cycle performance

Active Publication Date: 2018-12-07
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But NiCo 2 o 4 The inherent disadvantages of low first-time Coulombic efficiency, poor conductivity, and significant volume expansion effect make it exhibit relatively poor cycle stability and rate performance, among which the volume expansion effect and poor conductivity during charge and discharge are NiCo 2 o 4 Material's most fatal flaw

Method used

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  • Preparation and application of natural vegetable oil modified MOF structure polyoxides
  • Preparation and application of natural vegetable oil modified MOF structure polyoxides
  • Preparation and application of natural vegetable oil modified MOF structure polyoxides

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preparation example Construction

[0031]The preparation method of the multiple oxides of natural vegetable oil modified MOF structure of the present invention comprises the following steps:

[0032] (1) Precursor preparation:

[0033] Mix natural vegetable oil, surfactant and co-surfactant to prepare solution A; dissolve nickel salt and cobalt salt in water to prepare solution B; use the dispersion of nano-titanium dioxide as solution C; The organic acid of carboxyl functional group is mixed with water to prepare D solution;

[0034] Under the condition of stirring in a water bath at 30-60°C, mix solution A and solution D, then add solution B and solution C dropwise in turn to form a water-in-oil type emulsion, continue to stir under the condition of a water bath at 30-60°C, and then carry out After cooling, separating and drying, the precursor is obtained.

[0035] Wherein, the natural vegetable oil is obtained by pressing or extracting, and is one or more of soybean oil, linseed oil, peanut oil, corn oil, ...

Embodiment 1

[0044] In this embodiment, the steps for preparing the multi-component oxide of natural vegetable oil modified MOF structure are as follows:

[0045] (1) Precursor preparation:

[0046] To prepare solution A, mix and stir 200ml of soybean oil, 6g of cetyltrimethylammonium bromide (CTAB) and 10ml of n-pentanol in a water bath at 40°C until uniformly dispersed to obtain solution A.

[0047] To prepare solution B, mix and stir 20ml of deionized water, 4mmol of nickel nitrate and 8mmol of cobalt nitrate in a water bath at 40°C until it becomes clear and transparent to obtain solution B.

[0048] To prepare solution C, disperse 0.1 g of nano-titanium dioxide in 20 ml of deionized water to obtain solution C.

[0049] To prepare solution D, mix and stir 20ml of deionized water and 10mmol oxalic acid in a water bath at 40°C until it becomes clear and transparent to obtain solution D.

[0050] Under the condition of stirring in a water bath at 40°C, mix solution A and solution D, the...

Embodiment 2

[0056] In this embodiment, the steps for preparing the multi-component oxide of natural vegetable oil modified MOF structure are as follows:

[0057] (1) Precursor preparation:

[0058] To prepare solution A, mix and stir 200ml linseed oil, 6g lauryltrimethylammonium chloride (DTAC) and 10ml n-amyl alcohol in a water bath at 40°C until uniformly dispersed to obtain solution A.

[0059] To prepare solution B, mix and stir 20ml of deionized water, 4mmol of nickel nitrate and 8mmol of cobalt nitrate in a water bath at 40°C until it becomes clear and transparent to obtain solution B.

[0060] To prepare solution C, disperse 0.1 g of nano-titanium dioxide in 20 ml of deionized water to obtain solution C.

[0061] To prepare solution D, mix and stir 20ml of deionized water and 10mmol of citric acid in a water bath at 40°C until it becomes clear and transparent to obtain solution D.

[0062] Under the condition of stirring in a water bath at 40°C, mix solution A and solution D, the...

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Abstract

The invention relates to the preparation and application of a natural vegetable oil modified MOF structure polyoxide. The preparation method comprises the following steps: (1) preparing a precursor: mixing natural vegetable oil, a surfactant and a cosurfactant to prepare solution A; dissolving nickel salt and cobalt salt in water to obtain B solution; Taking the dispersion of nanometer titanium dioxide as C solution; Mixing an organic acid containing two or more carboxyl functional groups with water to prepare a D solution; Mixing solution A and solution D under the condition of water bath stirring, then dropping solution B and solution C in turn to form water-in-oil emulsion, continuing stirring under the condition of water bath, cooling, separating and drying to obtain precursor; (2) calcining the precursor to obtain polyoxides. The preparation method of the invention has the advantages of simple steps, easy realization and control, and the prepared material has high initial chargingand discharging efficiency, high specific capacity, good rate performance and cycle performance.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to the preparation and application of a natural vegetable oil-modified multi-component oxide with MOF structure. Background technique [0002] Now people are widely aware that the gas emitted from the burning of petroleum fuels not only pollutes the environment, but also causes global warming. Furthermore, with the consumption of oil and natural gas, it is urgent to find alternative renewable energy sources. With the rise of electric vehicles and many new types of small electronic devices, the need for sustainable and clean energy is growing. In the past few decades, lithium-ion batteries have been widely used in small electronic devices due to their high energy density. However, to meet emerging markets, such as large-scale applications such as electric vehicles and hybrid vehicles, a new generation of lithium-ion batteries must increase energy density and power densit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/485H01M10/0525
CPCH01M4/362H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 刘鹏汝强
Owner SOUTH CHINA NORMAL UNIVERSITY
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