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Lithium ion battery cathode material embedded nano metal loaded carbon nanosheet as well as preparation method and application thereof

A lithium-ion battery and nano-metal technology is applied in the fields of highly graphitized carbon nanosheets, the application of lithium-ion battery anode materials, and the preparation of embedded nano-metal-supported carbon nanosheet lithium-ion battery anode materials, which can solve the problem of nickel nanosheets. The problems of large particle size, poor performance of lithium battery, and a lot of capacity drop, to achieve the effect of large specific surface area, uniform size, and abundant active sites

Inactive Publication Date: 2015-04-22
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the only one report (J.Phys.Chem.C 2012, 116, 23974), the prepared carbon nanosheets are too thick, and the size of the loaded nickel nanoparticles is too large and not uniform enough. These structural defects lead to poor lithium battery performance. Well especially after 100 laps the capacity dropped a lot to only 635mAh g -1 , is 60% of 30 laps, and there is still a downward trend

Method used

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  • Lithium ion battery cathode material embedded nano metal loaded carbon nanosheet as well as preparation method and application thereof
  • Lithium ion battery cathode material embedded nano metal loaded carbon nanosheet as well as preparation method and application thereof
  • Lithium ion battery cathode material embedded nano metal loaded carbon nanosheet as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A preparation method of an embedded nano-nickel loaded carbon nanosheet lithium-ion battery negative electrode material, comprising the following steps:

[0042] (1) Precursor preparation: with glucose as carbon source, nickel nitrate as metal source, and inert salt sodium chloride as template and dispersant, weigh 0.6g Ni(NO 3 ) 2 ·6H 2 O, 2.0g glucose and 5g NaCl were put into a mortar and ground for 30min, then added 7mL distilled water, stirred for 10min to make Ni(NO 3 ) 2 Dissolved with glucose, put the mixture in an oven at 40°C, and then put it into a tube furnace.

[0043] (2) Precursor pyrolysis treatment: The prepared precursor samples are evenly spread on the bottom of the corundum ark, the ark is placed in the constant temperature zone of the tube furnace, and the nitrogen gas is passed for 30 minutes to discharge the air in the tube furnace, and the nitrogen gas is continued , under nitrogen atmosphere, at 5°C.min -1 Carry out temperature programming ...

Embodiment 2

[0046] Similar to Example 1, the difference is that the preparation method of the precursor in step (1) of this example is as follows: glucose is used as the carbon source, nickel nitrate is used as the metal source, and the inert salt sodium chloride is used as the template and dispersant, and the 0.6g Ni(NO 3 ) 2 ·6H 2 O, 2.0g glucose and 7g NaCl were put into a mortar and ground for 30min, then added 7mL distilled water, stirred for 10min to make Ni(NO 3 ) 2 Dissolved with glucose, put the mixture in an oven at 40°C, and then put it into a tube furnace.

Embodiment 3

[0048] Similar to Example 1, the difference lies in the step (1) precursor preparation method of this example, specifically: glucose is used as the carbon source, nickel nitrate is used as the metal source, and the inert salt sodium chloride is used as the template and dispersant, called Take 0.6g Ni(NO 3 ) 2 ·6H 2 O, 2.0g glucose and 10g NaCl were put into a mortar and ground for 30min, then added 7mL distilled water, stirred for 10min to make Ni(NO 3 ) 2 Dissolved with glucose, put the mixture in an oven at 40°C, and then put it into a tube furnace.

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Abstract

The invention discloses a lithium ion battery cathode material embedded nano metal loaded carbon nanosheet as well as a preparation method and an application thereof. By taking sugar (chitosan, cane sugar, fructose and glucose) as a carbon source, nitrate of transitional metals (Fe, Co and Ni) as a metal source and a catalyst and inert salts (sodium sulfate, sodium chloride, potassium chloride and cesium chloride) as a template and a dispersant, a two-dimensional carbon nanosheet which uniformly loads embedded nickel (or iron or cobalt) nanoparticles is prepared by a pyrolytic method in one step. The two-dimensional carbon nanosheet which uniformly loads embedded nickel (or iron or cobalt) nanoparticles prepared by the method is high in degree of graphitization, relatively high in specific surface area and high in conductivity, uniform in distribution and easy to separate, and the surface of the nanosheet is in a porous structure. The nanosheet as the lithium ion battery cathode material has relatively good circulating and rate performances.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a method for preparing an embedded nano metal-loaded carbon nanosheet lithium ion battery negative electrode material, and the highly graphitized carbon nanosheet evenly loaded with embedded metal nanoparticles prepared by the method Carbon nanosheets, and their application as anode materials for lithium-ion batteries. Background technique [0002] With the rapid development of modern society, energy has increasingly become one of the important factors restricting social development. As a new type of rechargeable power source, lithium-ion batteries have developed rapidly in recent years and have been widely used due to their excellent characteristics such as high energy density, small self-discharge, high working voltage, long cycle life, no memory effect, and no environmental pollution. In various portable electronic devices such as mobile phones, digital cam...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/587H01M4/133H01M10/0525C01B31/02
CPCB82Y30/00C01B32/05H01M4/362H01M4/38H01M4/587H01M10/0525Y02E60/10
Inventor 孙冬梅张京飞唐亚文吴平周益明
Owner NANJING NORMAL UNIVERSITY
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