CN206673026U

CN206673026U - MULTILAYER COMPOSITE oxygen catalysis electrode

Info

Publication number: CN206673026U
Application number: CN201621133585.5U
Authority: CN
Inventors: 方致蓝
Original assignee: Shenzhen Rui Rui Bao Energy Electronics Co Ltd
Current assignee: Shenzhen Rui Rui Bao Energy Electronics Co Ltd
Priority date: 2016-10-19
Filing date: 2016-10-19
Publication date: 2017-11-24
Anticipated expiration: 2026-10-19

Abstract

The utility model discloses a kind of MULTILAYER COMPOSITE oxygen catalysis electrode, the oxygen catalysis electrode includes current collector layer, the first Catalytic Layer, the second Catalytic Layer, air-permeable layer and the waterproof ventilated membrane that foam nickel screen is formed, the inner surface of first Catalytic Layer and the inner surface of the second Catalytic Layer are overlying on the two sides of current collector layer respectively, the inner surface of the air-permeable layer is in contact with the outer surface of the first Catalytic Layer, and the outer surface of the air-permeable layer is in contact with the inner surface of waterproof ventilated membrane.Compound using Catalytic Layer current collector layer Catalytic Layer air-permeable layer waterproof ventilated membrane sandwich construction, Stability Analysis of Structures, durability is strong, and catalytic activity is high, and technique is simple, and pole piece uniformity is good, process safety, can automatic continuous production, actual energy density can reach 110mA/cm², production process safety non-pollution, production cost is low, and product is recyclable, and the air electrode stable performance of making, durability is strong, can automate, large-scale production, there is wide applicability.

Description

MULTILAYER COMPOSITE oxygen catalysis electrode

Technical field

It the utility model is related to the technical field of aluminium-air cell, more particularly to a kind of MULTILAYER COMPOSITE oxygen catalysis electrode.

Background technology

Aluminium-air cell is using aluminium as negative pole, and air electrode is the metal battery of positive pole, compared with other metal batteries, The features such as ratio energy that itself has is high, production cost is low, safe and environment-friendly, can be good at solving current power battery continuing Navigating, low, charging is inconvenient, production cost is high, production and using the problems such as process is dangerous, pollution environment, has huge market Space and application prospect.

Aluminium-air cell electrolyte is potassium hydroxide aqueous solution or sodium hydrate aqueous solution, and reaction product aluminum oxide can follow Ring utilizes or is directly used as the raw material of industry, produces more high added value.Using process safety and reliability, blast, burning will not be produced Phenomena such as with electric leakage, it is a kind of abundant raw material sources, excellent honest and clean, safe and stable, the long-acting, zero-emission of price, free of contamination a new generation Electrokinetic cell.

The extensive tesla's lithium battery energy density of current application is 200wh/Kg, and actual energy density is 120-150wh/ Kg, and the theoretical energy density of aluminium-air cell is up to 8100wh/Kg, the aluminium-air cell actual energy density being currently known is 1000wh/Kg or so, the air electrode of this aluminium-air cell using absolute ethyl alcohol as dispersant, as catalyst adopt by silver-based Formed with Catalytic Layer-current collector layer-air-permeable layer structure fabrication.The air electrode cost is higher, and production process is dangerous, can only half hand Work formula makes, and structural instability, durability is not strong, thus mass production is difficult, it is also difficult to is commercially widely popularized use.

Utility model content

For weak point present in above-mentioned technology, a kind of manufacture craft of the utility model offer is simple, production process Safety and environmental protection, it can be mass, the MULTILAYER COMPOSITE oxygen catalysis electrode of stable performance, service life length.

In order to achieve the above object, a kind of MULTILAYER COMPOSITE oxygen catalysis electrode of the utility model, including be made up of foam nickel screen Current collector layer, the first Catalytic Layer, the second Catalytic Layer, air-permeable layer and waterproof ventilated membrane, the inner surface of first Catalytic Layer covers The another side of current collector layer, the inner surface of the air-permeable layer are overlying in the inner surface of the one side of current collector layer, and second Catalytic Layer It is in contact with the outer surface of the first Catalytic Layer, the outer surface of the air-permeable layer is in contact with the inner surface of waterproof ventilated membrane.

Wherein, first Catalytic Layer is identical with the size of the second Catalytic Layer and thickness is equal, first Catalytic Layer with And second two sides that Catalytic Layer is seamless, bubble-free is covered in current collector layer, the thickness of the air-permeable layer are thicker than waterproof ventilated membrane Thickness, and first Catalytic Layer and waterproof ventilated membrane is seamless, bubble-free is covered in current collector layer two sides.

Wherein, first Catalytic Layer and the second Catalytic Layer include polytetrafluoroethylene floor, multiple manganese dioxide particles, more Individual acetylene black particle and multiple lanthanum manganate particles, the multiple manganese dioxide particle, multiple acetylene black particles and multiple manganese Sour lanthanum particle is uniformly embedded into polytetrafluoroethylene floor；

Wherein, the air-permeable layer includes polytetrafluoroethylene floor, multiple short carbon fiber particles and multiple activated carbon granules, institute State multiple short carbon fiber particles and multiple activated carbon granules are uniformly embedded into polytetrafluoroethylene floor；The waterproof ventilated membrane is poly- Tetrafluoroethene layer.

Wherein, the MULTILAYER COMPOSITE oxygen catalysis electrode also includes the nickel bar as cathode sheet, and the nickel bar point is welded in afflux The end of layer.

The beneficial effects of the utility model are：

Compared with prior art, MULTILAYER COMPOSITE oxygen catalysis electrode of the present utility model, the air electrode use Catalytic Layer-collection Fluid layer-Catalytic Layer-air-permeable layer-waterproof ventilated membrane sandwich construction is compound, and Stability Analysis of Structures, durability is strong, and catalytic activity is high, and pole piece is equal Even property is good, process safety, can automatic continuous production, actual energy density can reach 110mA/cm², the air electrode of making Can be stable, durability is strong, can automate, large-scale production, commercially there is wide applicability.

Brief description of the drawings

Fig. 1 is the schematic cross-section of the utility model MULTILAYER COMPOSITE oxygen catalysis electrode；

Fig. 2 is the current density and durability contrast schematic diagram of the utility model catalyst component.

Main element symbol description is as follows：

10th, current collector layer 11, the first Catalytic Layer

12nd, the second Catalytic Layer 13, air-permeable layer

14th, waterproof ventilated membrane.

Embodiment

In order to more clearly state the utility model, the utility model is further described below in conjunction with the accompanying drawings.

With further reference to Fig. 1, oxygen catalysis electrode of the present utility model, including be made up of foam nickel screen current collector layer 10, First Catalytic Layer 11, the second Catalytic Layer 12, air-permeable layer 13 and waterproof ventilated membrane 14, the inner surface of the first Catalytic Layer 11 and The inner surface of two Catalytic Layers 12 is overlying on the appearance on the two sides of current collector layer 10, the inner surface of air-permeable layer 13 and the first Catalytic Layer 11 respectively Face is in contact, and the outer surface of air-permeable layer 13 is in contact with the inner surface of waterproof ventilated membrane 14.

First Catalytic Layer 11 is identical with the structure of the second Catalytic Layer 12, and includes polytetrafluoroethylene floor, multiple manganese dioxide Particle, multiple acetylene black particles and multiple lanthanum manganate particles, multiple manganese dioxide particles, multiple acetylene black particles and multiple Lanthanum manganate particle is uniformly embedded into polytetrafluoroethylene floor；Air-permeable layer 13 include polytetrafluoroethylene floor, multiple short carbon fiber particles with And multiple activated carbon granules, multiple short carbon fiber particles and multiple activated carbon granules are uniformly embedded into polytetrafluoroethylene floor；It is anti- Water ventilated membrane 14 is polytetrafluoroethylene floor.

In the present embodiment, the first Catalytic Layer 11 is identical with the size of the second Catalytic Layer 12 and thickness is equal, the first catalysis The two sides that Catalytic Layer is 12 seamless, bubble-free is covered in current collector layer of layer 11 and second, it is saturating that the thickness of air-permeable layer 13 is thicker than waterproof The thickness of air film 14, and the first Catalytic Layer 11 and waterproof ventilated membrane 14 is seamless, bubble-free is covered in current collector layer two sides.

In the present embodiment, the MULTILAYER COMPOSITE oxygen catalysis electrode also includes the nickel bar as cathode sheet, and nickel bar point is welded in The end of current collector layer.

The catalyst that the utility model uses is free of noble metal, uses what noble metal made ensure that catalytic activity is higher than While catalysis electrode, production cost greatly reduces；The absolute ethyl alcohol for replacing commonly using in metal battery using deionized water As dispersant, the security of production process ensure that；Mixed, shortened scattered in pulping process with high speed ball-milling method Time, the manpower and materials needed for production process are saved, improved the efficiency of large-scale production.

Further regard to Fig. 2, electrolytic manganese dioxide powder（EMD）Catalytic activity is high, and current density can reach under constant pressure 1.2V 110mA/cm2, but durability is not strong, and 8h attenuations are 13.6%, and lanthanum manganate prepared by chemical synthesis（CMD）Catalytic activity Low, current density is 63mA/cm2 under constant pressure 1.2V, but durability is strong, and 8h attenuations are 1.6%.This programme take CMD and EMD is used in mixed way according to a certain percentage, strengthens durability while its catalytic activity is ensured, the air made according to this programme Pole piece, current density is 75mA/cm under constant pressure 1.2V², 8h attenuations are 4%.

Disclosed above is only several specific embodiments of the present utility model, but the utility model is not limited to this, The changes that any person skilled in the art can think of should all fall into the scope of protection of the utility model.

Claims

A kind of 1. MULTILAYER COMPOSITE oxygen catalysis electrode, it is characterised in that including be made up of foam nickel screen current collector layer, first catalysis Layer, the second Catalytic Layer, air-permeable layer and waterproof ventilated membrane, the inner surface of first Catalytic Layer are overlying on the one side of current collector layer, and The inner surface of second Catalytic Layer is overlying on the appearance of the another side of current collector layer, the inner surface of the air-permeable layer and the first Catalytic Layer Face is in contact, and the outer surface of the air-permeable layer is in contact with the inner surface of waterproof ventilated membrane.
2. MULTILAYER COMPOSITE oxygen catalysis electrode according to claim 1, it is characterised in that first Catalytic Layer is urged with second The size of change layer is identical and thickness is equal, and first Catalytic Layer and the second Catalytic Layer are seamless, bubble-free is covered in afflux The two sides of layer, the thickness of the air-permeable layer are thicker than the thickness of waterproof ventilated membrane, and first Catalytic Layer and waterproof ventilated membrane Seamless, bubble-free is covered in the two sides of current collector layer.
3. MULTILAYER COMPOSITE oxygen catalysis electrode according to claim 1, it is characterised in that the MULTILAYER COMPOSITE oxygen catalysis electrode is also Including the nickel bar as cathode sheet, the nickel bar point is welded in the end of current collector layer.