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Metal formate/carbon nanotube lithium ion battery negative electrode material and preparation method thereof

A lithium-ion battery, metal formate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low electronic and ionic conductivity, low discharge specific capacity, and increased material polarization, and achieve high Effects of specific capacity, sufficient compounding, and increased contact area

Inactive Publication Date: 2019-03-26
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, the Tarascon research group introduced Fe, a MOFs material, for the first time. III (OH) 0.8 f 0.2 (BDC)·H 2 O(MIL-53(Fe)) is used as a cathode material for lithium-ion batteries, but the specific discharge capacity of the material is only 75mA h g -1
However, MOFs materials also have some problems when they are used as anode materials for lithium-ion batteries, the most prominent is the low electronic and ionic conductivity. Rapid decline in capacity, etc.

Method used

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  • Metal formate/carbon nanotube lithium ion battery negative electrode material and preparation method thereof
  • Metal formate/carbon nanotube lithium ion battery negative electrode material and preparation method thereof
  • Metal formate/carbon nanotube lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) take by weighing 5.678g nickel nitrate hexahydrate, 5ml purity be 88% formic acid (molar ratio 1: 6.7) at room temperature, add and fill 40ml N, in the beaker of N-dimethylformamide solvent, stir 30min, Mix the two evenly to obtain a mixed solution;

[0037] (2) Mix 0.0061 g of acidified carbon nanotubes and 9 ml of N, N-dimethylformamide in a beaker; stir at room temperature for 10 minutes, ultrasonically disperse for 30 minutes, repeat stirring and ultrasonically dispersing 3 times until the acidified carbon nanotubes are uniformly dispersed, made into a suspension;

[0038] (3) Measure 1ml of the mixed solution in step (1) and mix it with the suspension in step (2), stir for 30 minutes to mix the two evenly, and transfer the mixed solution to a 25ml reaction kettle with a Teflon liner , stamped and sealed;

[0039] (4) After the reaction, the reaction kettle was placed in a programmed temperature-controlled oven, and kept at 100°C for 2 days;

[0040] (5) Cool...

Embodiment 2

[0042](1) take by weighing 5.678g nickel nitrate hexahydrate, 5ml purity be 88% formic acid (molar ratio 1: 6.7) at room temperature, add and fill 40ml N, in the beaker of N-dimethylformamide solvent, stir 30min, Mix the two evenly to obtain a mixture;

[0043] (2) Mix 0.0091g ​​of acidified carbon nanotubes and 9ml of N, N-dimethylformamide in a beaker; stir at room temperature for 10 minutes, ultrasonically disperse for 30 minutes, repeat stirring and ultrasonically dispersing 3 times until the acidified carbon nanotubes are uniformly dispersed, made into a suspension;

[0044] (3) Measure 1ml of the mixed solution in step (1) and mix it with the suspension in step (2), stir for 30 minutes to mix the two evenly, and transfer the mixed solution to a 25ml reaction kettle with a Teflon liner , stamped and sealed;

[0045] (4) After the reaction, the reaction kettle was placed in a programmed temperature-controlled oven, and kept at 100°C for 2 days;

[0046] (5) Cool down to...

Embodiment 3

[0048] (1) take by weighing 5.678g nickel nitrate hexahydrate, 5ml purity be 88% formic acid (molar ratio 1: 6.7) at room temperature, add and fill 40ml N, in the beaker of N-dimethylformamide solvent, stir 30min, Mix the two evenly to obtain a mixture;

[0049] (2) Mix 0.0122g of acidified carbon nanotubes and 9ml of N, N-dimethylformamide in a beaker; stir at room temperature for 10 minutes, ultrasonically disperse for 30 minutes, repeat stirring and ultrasonically dispersing 3 times until the acidified carbon nanotubes are uniformly dispersed, made into a suspension;

[0050] (3) Measure 1ml of the mixed solution in step (1) and mix it with the suspension in step (2), stir for 30 minutes to mix the two evenly, and transfer the mixed solution to a 25ml reaction kettle with a Teflon liner , stamped and sealed;

[0051] (4) After the reaction, the reaction kettle was placed in a programmed temperature-controlled oven, and kept at 100°C for 2 days;

[0052] (5) Cool down to ...

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Abstract

The invention belongs to the technical field of lithium-ion battery electrode materials, and discloses a metal formate / carbon nanotube lithium-ion battery negative electrode material and a preparation method thereof, which comprises the following raw material components: metal nitrate, formic acid, N,N- Dimethylformamide, acidified carbon nanotubes, wherein the metal nitrates include nickel nitrate, cobalt nitrate, zinc nitrate, manganese nitrate; the molar ratio of metal nitrates to formic acid is 1:5‑1:8; acidified carbon nanotubes The mass of the metal nitrate is 10%-40% of the mass of the metal nitrate; the preparation method adopts a solvothermal method, and the obtained metal formate / carbon nanotube lithium-ion battery negative electrode material is effectively coated with carbon nanotubes, which significantly improves the material's durability. The electrical conductivity makes it have higher specific capacity and cycle stability, and can give full play to the respective advantages of carbon nanotubes and metal organic framework materials. It is an ideal negative electrode material for lithium ion batteries, and the preparation process of the inventive method is simple , easy to operate.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode active material, in particular to a metal formate / carbon nanotube lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] With the advancement of technology, lithium-ion batteries are gradually being widely used in electronic products, digital products and electric vehicles and other fields. As an important part of lithium-ion batteries, the performance of negative electrode materials directly affects the overall performance of lithium-ion batteries. At present, graphite is generally used as the anode material of commercialized lithium-ion batteries, but graphite has certain defects as the anode material, such as high selectivity to electrolyte and low theoretical specific capacity. Facing the requirements of high-energy energy storage systems on the market today, graphite can no longer meet the requirements, so new high-performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/583H01M4/139H01M10/0525
CPCH01M4/139H01M4/362H01M4/366H01M4/583H01M4/60H01M10/0525Y02E60/10
Inventor 苟蕾刘鹏刚夏霁雯刘丹樊小勇李东林
Owner CHANGAN UNIV
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