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Lithium air or oxygen battery

A lithium-air battery, oxygen battery technology, applied in battery electrodes, circuits, electrical components, etc., to achieve high specific capacity, good industrial practical value, and excellent electrochemical performance.

Active Publication Date: 2012-07-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of doped modified carbon material has been successfully used as an oxygen reduction catalyst for fuel cells, but lithium-air (oxygen) batteries have not been reported to use nitrogen-doped carbon materials as electrode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Air or oxygen electrode preparation

[0044] Nitrogenous carbon (NdKB-EC600JD) material is prepared by existing preparation methods, reference: "Highly dispersed and high-load core-shell structure carbon material-supported platinum catalyst for methanol electrocatalytic oxidation" (Gang Wu, Deyu Li, Changsong Dai, Dianlong Wang, and Ning Li, Well-Dispersed High-Loading Pt Nanoparticles Supported by Shell-Core Nanostructured Carbon for Methanol Electrooxidation, Langmuir, 2008, 24, 3566-3575).

[0045] Niza Ketjen Black (NdKB-EC600JD) preparation method: stirring-ultrasonic dispersion of Ketjen Black (KB-EC600JD) methanol solution to obtain a uniform Ketjen Black methanol suspension, put the beaker containing the suspension In the ice-water bath, the sulfuric acid solution (mol ratio is 1: 1) of aniline (aniline feed intake is 2.7% excessive 15% is calculated by the mass percentage composition of nitrogen element in the target product azaketjen black) and ammonium per...

Embodiment 2

[0064] 1. Air or oxygen electrode preparation

[0065] Nitrogenous carbon (Nd-MWCNTs) materials are prepared by existing preparation methods, reference: "Highly dispersed and high-loaded core-shell structure carbon material-supported platinum catalyst for methanol electrocatalytic oxidation" (Gang Wu, Deyu Li, Changsong Dai, Dianlong Wang, and Ning Li, Well-Dispersed High-Loading Pt Nanoparticles Supported by Shell-Core Nanostructured Carbon for Methanol Electrooxidation, Langmuir, 2008, 24, 3566-3575).

[0066]Preparation method of aza multi-walled carbon nanotubes (Nd-MWCNTs): Stir-ultrasonic dispersion of methanol solution of multi-walled carbon nanotubes (MWCNTs) to obtain a uniform suspension of multi-walled carbon nanotubes in methanol, which will contain the suspension The beaker of liquid is put into ice-water bath, the sulfuric acid solution (molar ratio 1:1) were added dropwise to the multi-walled carbon nanotube methanol suspension, along with the dropwise addition...

Embodiment 3

[0074] 1. Air or oxygen electrode preparation

[0075] The preparation of azaketjen black (NdKB-EC600JD) is the same as that of azaketjen black in Example 1.

[0076] Mix and grind nitrogen-doped carbon (NdKB-EC600JD) material and TiN at a mass ratio of 99:1 (the homogeneous mixture is marked as NdKB-EC600JD+1wt%TiN), and then add the mixed PTFE+D.I.W+PO emulsion (in the emulsion The weight percentage of PTFE is 60%, the weight percentage of D.I.W is 30%, and the weight percentage of PO is 10%), wherein the mass percentage of nitrogen element in the aza carbon material is 2.7%, aza The mass ratio of the total mass of carbon (NdKB-EC600JD) material and TiN material to PTFE is 85:15, stir it into a viscous state, and apply it on the collector foam nickel with a thickness of about 0.1 mm. After drying, put it in a vacuum oven at 120°C for 10 hours and punch it into a disk-shaped (φ=14mm) nitrogen-doped carbon electrode mixed with 1wt% TiN, and move it into a glove box filled wit...

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Abstract

The invention discloses a lithium air or oxygen battery, comprising an air or oxygen electrode, a cathode, a diaphragm and electrolyte, wherein materials of the air or oxygen electrode comprise a nitrogen-doped carbon material and further comprise one or more than two of a transition metal oxide, a transition metal nitride, a transition metal carbonitride, a transition metal carbide and other catalysts. According to the invention, the nitrogen-doped carbon material is used to a traditional carbon material, meanwhile, the cheap catalyst which constitutes an active substance of the air or oxygen electrode can be used in an auxiliary way or is not used, and compared with the traditional lithium air or oxygen battery, the lithium air or oxygen battery which is finally obtained according to the invention has higher specific capacity, higher discharge plateau, favorable integral electrochemical performance and better industrial practical values. In addition, the lithium air or oxygen battery disclosed by the invention is extremely suitable for being used as a backup battery for substituting a lithium ion battery.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium-air or oxygen battery. Background technique [0002] Today, environmental issues are of great concern, so the energy storage devices required for electric or hybrid vehicles that replace fuel-powered vehicles have been well developed. Lithium-ion batteries have been widely used in portable electronic products, power tools and other fields due to their high energy density. However, the mature lithium-ion batteries so far use inorganic transition metal elements such as cobalt and nickel as the main positive electrode active materials. Therefore, the large-scale use of lithium-ion batteries will inevitably lead to a crisis of metal resources such as cobalt and nickel. Moreover, the energy density of lithium-ion batteries is approaching the limit. Therefore, it is inevitable to develop chemical power sources with higher energy density. Lithium-air or oxygen batteries, ie: lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/08H01M4/86H01M4/96
CPCY02E60/50Y02E60/128Y02E60/10
Inventor 刘现军王德宇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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