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Metal-nitrilotriacetic acid composite cathode material of lithium battery and preparation method

A technology of nitrilotriacetic acid and negative electrode materials, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of long charging and discharging time, achieve the effects of expanding specific surface area, improving reaction utilization rate, and increasing charging and discharging speed

Active Publication Date: 2018-06-01
山东信开源科技创新发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the current charging and discharging time of lithium-ion batteries is long and the modification method of simply improving the conductivity of negative electrode materials cannot meet the needs of high-speed development of electric vehicles, the present invention proposes a metal-ammoniatriacetic acid composite negative electrode material for lithium-ion batteries and its preparation method, so as to achieve low-cost preparation of fast charge and discharge negative electrode materials, and further promote the development of fast charge and discharge technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:

[0026] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid

[0027] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, dissolve copper chloride in deionized water to form a 0.1mol / L metal ion solution and put it into the flask. Turn on the stirrer and ultrasonic vibration, slowly Add nitrilotriacetic acid to obtain a metal salt-nitrilotriacetic acid complex aqueous solution, and the molar ratio of added nitrilotriacetic acid to metal ions is 1:0.5. The rotational speed of the mechanical stirring is controlled at 150r / min.

[0028] 2. Hydrothermal polymerization

[0029] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 110°C, feed nitrogen to maintain the pressure at 0....

Embodiment 2

[0033] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:

[0034] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid

[0035] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, nickel nitrate is dissolved in deionized water to form a 0.2mol / L metal ion solution and put into the flask. Turn on the stirrer and ultrasonic vibration, and slowly add Nitrilotriacetic acid to obtain metal salt-nitrilotriacetic acid complex aqueous solution, the molar ratio of added nitrilotriacetic acid to metal ions is 1:1. The rotational speed of the mechanical stirring is controlled at 300r / min.

[0036] 2. Hydrothermal polymerization

[0037] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 120°C, feed nitrogen to maintain the pressure at 0.75MPa,...

Embodiment 3

[0041] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:

[0042] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid

[0043] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, dissolve cobalt nitrate in deionized water to form a 0.4mol / L metal ion solution and put it into the flask. Turn on the stirrer and ultrasonic vibration, and slowly add The nitrilotriacetic acid is used to obtain a metal salt-nitrilotriacetic acid complex aqueous solution, and the molar ratio of the added nitrilotriacetic acid to the metal ion is 1:1.5. The rotational speed of the mechanical stirring is controlled at 300r / min.

[0044] 2. Hydrothermal polymerization

[0045] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 130°C, feed nitrogen gas to m...

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Abstract

The invention provides a metal-nitrilotriacetic acid composite cathode material of a lithium battery and a preparation method. A metal-organogel composite material is synthesized by performing a complexation reaction on metal ions and nitrilotriacetic acid. In the cathode material, due to complexation of metals and an organic phase, double-amino acid anion dangling bonds are formed on the surfaceof the organic phase, so that compared with the traditional cathode lithium-ion intercalation, the double-anion dangling bonds are stronger in adsorption capacity, and the electron mobility inside a cathode material is greater than that of the traditional solid-phase cathode material such as graphite by two orders of magnitude. The metal-nitrilotriacetic acid composite cathode material has the advantage that the capacity and the charge and discharge performances of the battery can be greatly improved.

Description

technical field [0001] The invention relates to the fields of lithium-ion batteries and energy materials, in particular to a metal-ammoniatriacetic acid negative electrode material and a preparation method for a fast-charging-discharging lithium battery. Background technique [0002] Influenced by factors such as the increasing shortage of oil and the official entry into force of the Kyoto Protocol, the use of electricity in transportation to replace oil has become a new green industry actively promoted by governments of various countries. Compared with the refueling time, electric vehicles still have one of the biggest problems, that is, whether they can "eat and drink enough" in the shortest time. The car must be used as a means of transportation, and it can be used quickly during use and in emergencies , to reduce the time wasted by drivers waiting for use during use. Therefore, energy storage devices that can be widely used in hybrid electric vehicles and plug-in hybrid...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/0525C08G83/00
CPCC08G83/008H01M4/602H01M10/0525H01M2004/027Y02E60/10
Inventor 陈庆廖健淞
Owner 山东信开源科技创新发展有限责任公司
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