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Metal formate/carbon nano tube lithium ion battery cathode material and preparing 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: 2016-04-13
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 the positive electrode material of lithium-ion batteries, but the specific discharge capacity of the material is only 75mAh 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 nano tube lithium ion battery cathode material and preparing method thereof
  • Metal formate/carbon nano tube lithium ion battery cathode material and preparing method thereof
  • Metal formate/carbon nano tube lithium ion battery cathode material and preparing method thereof

Examples

Experimental program
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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 40mlN, in the beaker of N-dimethylformamide solvent, stir 30min, make The two are mixed evenly to obtain a mixed solution;

[0037] (2) Mix 0.0061g 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, and prepare 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;

...

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 40mlN, in the beaker of N-dimethylformamide solvent, stir 30min, make The two are mixed evenly to obtain a mixed solution;

[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, and prepare 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;

...

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 40mlN, in the beaker of N-dimethylformamide solvent, stir 30min, make The two are mixed evenly to obtain a mixed solution;

[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, and prepare 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;

...

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Abstract

The invention belongs to the technical field of lithium ion battery electrode materials, and discloses a metal formate / carbon nano tube lithium ion battery cathode material and a preparing method thereof. The lithium ion battery cathode material is prepared from metal nitrate, formic acid, N,N-dimethylformamide and acidized carbon nano tubes, wherein the metal nitrate includes nickel nitrate, cobalt nitrate, zinc nitrate and manganous nitrate, the molar ratio of the metal nitrate to formic acid is 1:5-1:8, and the mass of the acidized carbon nano tubes accounts for 10-40% that of the metal nitrate. The preparing method adopts a solvothermal method, conductivity of the obtained metal formate / carbon nano tube lithium ion battery cathode material is remarkably improved by means of effective cladding of the carbon nano tubes, the material has high specific capacity and circulation stability, respective advantages of the carbon nano tubes and a metal-organic framework material can be brought into play, and the material is an ideal lithium ion battery cathode material. The preparing method is simple in preparation technology and convenient and 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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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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