Thin metal-air batteries

A battery and a technology within the battery, applied in the direction of hybrid batteries, battery electrodes, printed batteries, etc., can solve the problems of low power, small internal volume of active materials, high cost, etc.

Inactive Publication Date: 2012-01-04
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some very thin primary batteries are available, their practical application is limited by factors such as low power, low operating capacity, poor charge storage and relatively high cost due to their physical size
For example, due to

Method used

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  • Thin metal-air batteries
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Example 1 - Caseless Battery

[0102] Caseless batteries are constructed as follows:

[0103] For the anode, zinc foil (Alfa Aesar, Inc.) was obtained by pressing the foil with two stainless steel rollers to a thickness of about 0.1 mm. per cm 2 A density of three holes was punched with 1 / 8" diameter perforations. The perforated zinc foil was cut into 0.75" x 1.25" rectangles with protrusions measuring 0.25" x 0.5" inches.

[0104] For the cathode, the Co-PAN catalyst powder was prepared as described in S.Gupta,.D.Tryk, I.Bae,.W.Aldred and E.Yeager, (1989) J.Applied Electrochem.Vol. 19, p. 19-27. Catalyst powder was mixed with 40% by weight Teflon in a Teflon dispersion (T30B, ​​DuPont) and diluted with isopropanol for easy coating on hydrophobic nonwoven graphite paper (E-TEK). Spray the catalyst mixture on one side of the graphite paper with a packing density of 0.5 mg / cm 2 . After drying, the resulting paper had a thickness of about 0.1 mm, which was cut to a...

Embodiment 2

[0107] Example 2 - Shunt Resistor Using Caseless Batteries

[0108] Electronic circuit 50 obtained from Pregnancy test kit. Connect the circuit to a two-cell battery 52 (constructed as described in Example 1), as Image 6 shown in series connection. get used Figure 5 The battery voltage and current of the shunt resistor and the Figure 7 displayed in . Once the microcontroller runs through the sequence of operations, the battery maintains a near constant voltage and outputs varying currents. In addition, the LEDs on the electronic circuit remain lit and fully operational during the measurement.

Embodiment 3

[0109] Example 3 - Aluminum-air battery

[0110] A portion (1.5 x 3.8 cm) of a commercially available air cathode (Duracell) was cut out, leaving the attached paper separator. 0.5cc of 1M aqueous potassium carbonate solution was dispensed onto the separator, and the cathode was dried in an oven at 110°C for 30 minutes. A portion of aluminum foil (Alcan, 0.001″) approximately the same size as the cathode was cut out and made with 3 holes / cm 2 perforated at a density of 1 / 8″ in diameter. Kapton tape (3M) was used to join the short face edges of the aluminum foil to the cathode and separator to make an aluminum-air battery. See Figure 8 , connect two batteries in series and connect them with light-emitting diodes (LEDs). When 1cc of water is added to the pierced area, such as Figure 8 The LED shown turns on. Meanwhile, the measured current is in the range of 50-100mA at a battery voltage of 1.9-2.5V.

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Abstract

Thin metal-air batteries are described. The batteries do not have an enclosure.

Description

technical field [0001] The present invention relates to metal / air cells in which air is admitted to a first electrode (typically the cathode) and a second electrode (typically the anode) is oxidized by oxygen in the air. Background technique [0002] Batteries or electrochemical cells are commonly used sources of electrical energy. A battery, such as a metal-air battery, contains a negative electrode, often called an anode, and a positive electrode, usually called a cathode. The anode can oxidize the active species; the cathode can consume the active species which can be reduced. The anode active material is capable of reducing the cathode active material. [0003] When a battery is used as a source of electrical energy in a device, electrical contact is made with the anode and cathode, allowing electrons to flow through the device and undergo respective oxidation and reduction reactions to provide electrical power. The electrolyte in contact with the anode and cathode co...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M4/60H01M6/34H01M6/40H01M12/06H01M50/414H01M50/429H01M50/489
CPCH01M4/44H01M4/60H01M2/1653H01M6/34H01M4/46H01M4/608H01M6/40H01M12/065H01M2/1626Y10T29/49108Y10T29/49115Y10T29/49114Y10T29/49112H01M50/4295H01M50/44H01M50/429H01M50/414H01M50/489
Inventor I·T·贝J·M·博尔顿S·J·施佩希特
Owner THE GILLETTE CO
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