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Lithium-carbon dioxide battery positive electrode material and application thereof

A carbon dioxide, battery cathode technology, applied in battery electrodes, fuel cells, circuits, etc., can solve the problems of using high-temperature equipment such as tube furnaces, increasing the cost of precious metals, and less catalytic active sites, and achieving solutions to large charge-discharge potential differences, The effect of complete electrode structure and simple preparation method

Active Publication Date: 2020-08-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are at least the following problems in the prior art: although pure carbon materials such as graphene and multi-walled carbon nanotubes have high electrical conductivity, they have few catalytic active sites for carbon dioxide and the preparation requires the use of high-temperature equipment such as tube furnaces and other disadvantages; the use of composite materials often requires the use of precious metal materials, such as ruthenium platinum, etc., although its catalytic activity has improved, but the use of precious metals will lead to cost increases that will limit its use

Method used

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  • Lithium-carbon dioxide battery positive electrode material and application thereof
  • Lithium-carbon dioxide battery positive electrode material and application thereof
  • Lithium-carbon dioxide battery positive electrode material and application thereof

Examples

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Embodiment 1

[0044] This embodiment provides the preparation of a positive electrode material for a lithium carbon dioxide battery, comprising the following steps:

[0045] 1) Graphene oxide GO was prepared by the modified Hummer method:

[0046] Add 2.5 grams of potassium persulfate, 2.5 grams of phosphorus pentoxide and 3 grams of graphite powder into 12 milliliters of 96wt% concentrated sulfuric acid at 80°C and stir for 4.5 hours. After cooling, add deionized water and then centrifugally dry to obtain preoxidized graphite powder;

[0047]Add the pre-oxidized graphite powder to 120 ml of 96% concentrated sulfuric acid in an ice bath, add 15 mg of potassium permanganate and stir at 35°C for 2 hours, then add 250 ml of deionized water and stir for 2 hours, then add 700 ml to Ionized water and 20 milliliters of 30wt% hydrogen peroxide, the solution turns bright brownish yellow; use 1 liter of dilute hydrochloric acid with a mass fraction of 0.1 to filter and wash, then wash with water and...

Embodiment 2

[0056] This embodiment provides a preparation of a lithium carbon dioxide battery, comprising the following steps:

[0057] 1) Preparation of positive electrode of lithium carbon dioxide battery:

[0058] Take 12 mg of the lithium carbon dioxide battery cathode material prepared in Example 1 and mix it with 2 mg of polyvinylidene fluoride PVDF, stir it into a slurry with N-methylpyrrolidone as a solvent, and coat the slurry on a carbon paper of 40 square centimeters , dried in a vacuum oven at 80°C, cut into small discs with a diameter of 12 mm at room temperature, which is the positive electrode of the lithium carbon dioxide battery, and the loading capacity of the positive electrode material of the lithium carbon dioxide battery is 0.3 mg / cm 2 ;

[0059] II) Preparation of CR2032 button cell with holes:

[0060] The assembly of the CR2032 button cell with holes is completed in a glove box full of argon, with the lithium sheet as the negative pole, and the positive pole of ...

Embodiment 3

[0067] This example provides the preparation of a cathode material for a lithium carbon dioxide battery. The steps of the method are the same as those in Example 1, except that the ammonia water with a mass fraction of 25% in step 2) is replaced with a hydrazine hydrate solution with a mass fraction of 25% to obtain Aminated graphene oxide GO-N 2 h 4 . h 2 O is the anode material for lithium carbon dioxide batteries.

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Abstract

The invention discloses a lithium carbon dioxide battery positive electrode material and application thereof. The lithium carbon dioxide battery positive electrode material comprises aminated grapheneoxide; and the aminated graphene oxide is prepared by mixing graphene oxide, an amination reagent and water and carrying out hydrothermal reaction. The invention also provides an application of the lithium carbon dioxide battery positive electrode material in preparation of a lithium carbon dioxide battery positive electrode. The preparation method of the aminated graphene oxide in the positive electrode material of the lithium-carbon dioxide battery is simple, and the problems of large charge-discharge potential difference, poor cycle performance and the like of a high-capacity battery are solved.

Description

technical field [0001] The invention relates to the field of lithium carbon dioxide batteries. More specifically, it relates to a lithium carbon dioxide battery cathode material and its application. Background technique [0002] Lithium carbon dioxide battery, because of its high working voltage and specific energy, fast charging and discharging and high safety performance, absorbs and utilizes the greenhouse gas carbon dioxide, etc., is regarded as a common energy storage device with scientific research significance and rapid development. It has a very wide range of applications in places rich in carbon dioxide (such as Mars, exhaust ports, etc.). How to improve the catalytic performance of materials, reduce the polarization overpotential of the battery and improve the cycle performance of the battery is an important problem to be solved urgently. [0003] For lithium carbon dioxide batteries, metal lithium sheets are generally used as the negative electrode of the batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/88H01M8/0668
CPCH01M4/8828H01M4/8882H01M4/96H01M8/0668Y02E60/50
Inventor 刘栋高志
Owner BEIJING UNIV OF CHEM TECH
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