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Lithium-oxygen battery capable of improving battery energy density and method for manufacturing lithium-oxygen battery

A lithium-oxygen battery and battery energy technology, applied in the direction of fuel cell half-cells and secondary battery-type half-cells, active material electrodes, etc., can solve space utilization, material utilization, weight saving and safety technical indicators Poor, difficult to meet the capacity requirements of electric vehicles, low utilization of battery electrodes, etc., to achieve the effect of increasing the working voltage and open circuit voltage, improving space utilization, and increasing energy density

Active Publication Date: 2014-12-10
赵军辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the single battery only has a pair of negative and positive electrodes, the utilization rate of the battery electrodes is low, and the battery is large in size and heavy in weight.
However, electric vehicles require a large-capacity power supply, and it is difficult for a single battery to meet the capacity requirements of an electric vehicle, so it must be used in parallel in multiple stages. ~3 volts must be used in series in multiple stages, resulting in a very large volume and heavy weight of the lithium-oxygen battery used as the power device of the electric vehicle. The technical indicators in terms of safety and security are poor and unreasonable, and need to be optimized, improved and perfected

Method used

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  • Lithium-oxygen battery capable of improving battery energy density and method for manufacturing lithium-oxygen battery
  • Lithium-oxygen battery capable of improving battery energy density and method for manufacturing lithium-oxygen battery
  • Lithium-oxygen battery capable of improving battery energy density and method for manufacturing lithium-oxygen battery

Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) Preparation of the positive electrode element: nickel foam is used as the positive electrode current collector 8, and the holes of the nickel foam are used as compressed air channel holes 9 for compressed air to enter, and a load of 20wt% Mn 2.7 Ni 0.3 o 4 Sheet-like nanostructured graphene as the oxygen reduction catalyst 7 is used as the carbon-oxygen positive electrode material 6, the conductive agent is acetylene black, and the binder is polytetrafluoroethylene (PTFE). The detailed formula is acetylene black: binder: nanostructured graphene = 5:12:88. According to this ratio, a slurry is made, and the surface of nickel foam is coated, then rolled, baked and dried to make a positive electrode component. An electrode post is welded to one end of the positive electrode collector 7 .

[0064] (2) Preparation of the negative electrode element: the negative electrode current collector 1 is made of nickel foil with a thickness of 0.1 mm. The negative electrode mater...

Embodiment 2

[0073] Such as Figure 2~6 The lithium-oxygen battery shown is an embodiment of the present invention, and the difference from embodiment 1 is:

[0074] (2) Negative electrode element: the negative electrode current collector 1 is made of copper foil with a thickness of 0.1 mm.

[0075] (3) Solid electrolyte diaphragm: solid electrolyte diaphragm 4 adopts polyethylene oxide PEO with catalyst 18 LiTFSI film. The polymer film is made into a packaging bag for wrapping the negative electrode element in advance, and the part with the lithium metal sheet in the negative electrode element is inserted into the packaging bag, and then the solid electrolyte diaphragm is pressed on the surface of the two lithium metal sheets and The opening of the packaging bag was sealed, thereby sealing the periphery of the part having the lithium metal sheet in the negative electrode element. The polymer film has a thickness of 100 μm and a Li-ion conductivity of 10 -4 S / cm, electrochemical window...

Embodiment 3

[0078] The difference between this embodiment and embodiment 1 is:

[0079] (1) Preparation of positive electrode components: Nickel mesh is used as the positive electrode current collector 8, and columnar nanostructured graphene is used as the carbon-oxygen positive electrode material 6.

[0080] (2) Negative electrode element: the negative electrode current collector 1 adopts a nickel mesh with a thickness of 0.1mm.

[0081] A pure lithium sheet with a thickness of 0.5mm was used as the negative electrode material.

[0082] (3) Solid electrolyte diaphragm: solid electrolyte diaphragm 4 adopts polyethylene oxide PEO with catalyst 18 LiTFSI film. The polymer film is made into a packaging bag for wrapping the negative electrode element in advance, and the part with the lithium metal sheet in the negative electrode element is inserted into the packaging bag, and then the solid electrolyte diaphragm is pressed on the surface of the two lithium metal sheets and The opening of t...

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Abstract

The invention discloses a lithium-oxygen battery capable of improving battery energy density. The lithium-oxygen battery comprises two cathodes, two anodes and two solid electrolyte diaphragms. Each anode consists of anode electrolyte solution and an anode element composed of carbon-oxygen anode materials and an anode current collector, and each cathode comprises a cathode element which consists of a cathode current collector and a lithium metal plate. The two cathodes share a same cathode current collection plate, the two lithium metal plates are attached onto two surfaces of the cathode current collection plate respectively, and the two solid electrolyte diaphragms are attached onto the other faces of the two lithium metal plates respectively. The anodes are electrically connected with an anode end of a battery shell, and the cathodes are electrically connected with a cathode end of the battery shell. The invention further discloses a method for preparing the lithium-oxygen battery. The lithium-oxygen battery is small in size and high in energy density, and space utilization rate of the battery is increased.

Description

technical field [0001] The invention relates to a lithium-oxygen battery, in particular to a lithium-oxygen battery that can increase the energy density of the battery, and also relates to a manufacturing method of the lithium-oxygen battery that can increase the energy density of the battery. Background technique [0002] At present, automobiles worldwide have caused serious environmental hazards due to industrial waste gas and automobile exhaust: urban air quality has declined, and polluted air has caused lung, respiratory tract, heart, skin and other human organ diseases; industrial waste gas and automobile exhaust are still contributing to the global warming effect One of the main reasons, while the greenhouse effect is accelerating the rate of global temperature rise. With the continuous improvement and improvement of people's living standards in our country, cars are rapidly popularized in ordinary families, and the number of car ownership and new additions are increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/08H01M4/02
CPCY02E60/10
Inventor 赵军辉
Owner 赵军辉
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