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Carbon nanotube/nickel cobaltate lithium ion battery negative electrode material and preparation method thereof

A lithium-ion battery and carbon nanotube technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems that fossil energy cannot meet energy demand, achieve excellent cycle performance, simple process, and improve material performance.

Active Publication Date: 2020-03-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional fossil energy can no longer meet the growing energy demand of mankind

Method used

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  • Carbon nanotube/nickel cobaltate lithium ion battery negative electrode material and preparation method thereof
  • Carbon nanotube/nickel cobaltate lithium ion battery negative electrode material and preparation method thereof
  • Carbon nanotube/nickel cobaltate lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Mix 1mmol nickel nitrate hexahydrate and 2mmol cobalt nitrate hexahydrate, dissolve in 25 milliliters of dehydrated ethanol solution, then add 5 milliliters of deionized aqueous solution containing 0.8 gram of cetyltrimethylammonium bromide, then Add 0.0646 g of carbon nanotubes (CNTs), sonicate for 30 minutes, and stir for 1 hour to obtain a mixed solution A;

[0028] (2) Pour the mixed solution into a 50 ml reactor liner, then heat it in water at 180°C for 6 hours, and then filter and dry to obtain the CNTs / nickel cobaltate precursor;

[0029] (3) The CNTs / nickel cobaltate precursor was calcined at 450°C in an air atmosphere at a heating rate of 2°C / min for 2 hours to obtain CNTs / NiCo 2 o 4 composite materials;

Embodiment 2

[0031] (1) Mix 1 mmol nickel nitrate hexahydrate and 2 mmol cobalt nitrate hexahydrate, dissolve in 5 ml deionized water, then add 25 ml hexadecyl trimethylammonium bromide containing 0.8 g cetyl trimethyl ammonium bromide Ammonium bromide solution, then add 0.0646 grams of carbon nanotubes (CNTs), ultrasonic 30 minutes, stirred for 1 hour, to obtain a mixed solution A;

[0032] (2) Pour the mixed solution into a 50 ml reactor liner, then heat it in water at 180°C for 6 hours, and then filter and dry to obtain the CNTs / nickel cobaltate precursor;

[0033] (3) The CNTs / nickel cobaltate precursor was calcined at 450°C in an air atmosphere at a heating rate of 2°C / min for 2 hours to obtain CNTs / NiCo 2 o 4 composite materials;

Embodiment 3

[0035] (1) 1mmol nickel nitrate hexahydrate, 2mmol cobalt nitrate hexahydrate, and 0.8 gram of cetyltrimethylammonium bromide were dissolved in a mixed solution containing 25 milliliters of absolute ethanol and 5 milliliters of deionized water. Then add 0.0646 g of carbon nanotubes (CNTs), ultrasonic for 30 minutes, and stir for 1 hour to obtain a mixed solution A;

[0036] (2) Pour the mixed solution into a 50 ml reactor liner, then heat it in water at 180°C for 6 hours, and then filter and dry to obtain the CNTs / nickel cobaltate precursor;

[0037] (3) The CNTs / nickel cobaltate precursor was calcined at 450°C in an air atmosphere at a heating rate of 2°C / min for 2 hours to obtain CNTs / NiCo2 o 4 composite materials;

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Abstract

The invention discloses a carbon nanotube / nickel cobaltate lithium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the following steps of: preparing a carbon nanotube / nickel cobaltate precursor composite material by using a hydrothermal method, and inserting carbon nanotubes into nickel cobaltate spheres or distributing the carbon nanotubes around the spheres, and calcining the carbon nanotube / nickel cobaltate precursor in air to obtain the carbon nanotube / nickel cobaltate. The obtained final product can be used as a lithium ion battery negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials for lithium ion batteries, and more specifically relates to a carbon nanotube / nickel cobaltate (CNTs / NiCo 2 o 4 ) negative electrode material and its preparation method. Background technique [0002] Traditional fossil energy can no longer meet the increasing energy demand of mankind. Coupled with the global non-renewable energy crisis, sustainable energy is widely favored. The emergence of lithium-ion batteries, a safe and efficient new energy source, has alleviated the above-mentioned needs and crises to a certain extent. As one of the important components of lithium-ion batteries, the composition and performance of negative electrode materials have a decisive impact on the overall performance of lithium-ion batteries. [0003] As a binary transition metal oxide, nickel cobaltate has a high theoretical capacity. At the same time, compared with single-component oxides,...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525
CPCH01M4/362H01M4/52H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 郭瑞松罗亚妮厉婷婷李福运董琳琳
Owner TIANJIN UNIV
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