Integrated combined power supply of metal oxygen cell/hydrogen-oxygen fuel cell

An oxygen cell and fuel cell technology, applied in the direction of fuel cell type half cell and primary cell type half cell, etc., can solve problems such as corrosion, achieve the effects of less energy consumption, improved energy utilization rate, and simple structure

Active Publication Date: 2010-06-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of metal oxygen cell anode corrosion and hydrogen evolution, and overcome the deficiencies of the above-mentioned current technologies, the present invention provides a metal oxygen cell / hydrogen fuel cell integrated power supply, which can not only eliminate the by-product hydrogen of the metal oxygen cell in situ, but also recover part of the energy

Method used

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  • Integrated combined power supply of metal oxygen cell/hydrogen-oxygen fuel cell

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Embodiment 1

[0027] The metal anode 1 of the metal oxygen battery adopts AZ31 magnesium alloy anode with an area of ​​9.6cm 2 , the oxygen cathode cavity 8 is passed into air (oxygen therein is an oxidizing agent), H 2 -O 2 The fuel cell porous metal anode 4 adopts 110PPI porous nickel foam coated with Pd on the surface, with an area of ​​4.8cm 2 , Mg-O 2 battery cathode 5 and H 2 -O 2 The fuel cell cathode 6 is coated with MnO 2 The cathode of the catalyst, the diaphragm material 7 is a glass fiber woven mesh. The inlet electrolyte 2 is 3.5% NaCl solution at a temperature of 20°C, and the insulating material 9 is AB glue. From the battery inlet, the electrode presses Mg-O 2 Cathode 5 and H 2 -O 2 The cathode 6 is arranged once. Mg-O 2 battery cathode 5 and H 2 -O 2 The fuel cell cathode area is equal (both are 4.8cm 2 ). Mg-O 2 When the battery is not discharged, due to the small amount of hydrogen evolution, the H 2 -O 2 The open circuit voltage of the fuel cell is only...

Embodiment 2

[0029] Mg-O 2 The area of ​​cathode 5 is larger than H 2 -O 2 Fuel cell cathode 6 area, from cell inlet, electrode by Mg-O 2 Cathode 5 and H 2 -O 2 Fuel cell cathodes 6 are alternately arranged, (respectively 6.5cm 2 , 3cm 2 , 6.5cm 2 , 3cm 2 ), the metal anode area of ​​the metal oxygen battery is 19cm 2 , H 2 -O 2 Fuel cell porous metal anode area is 6cm 2 . Other conditions are with embodiment 1. In Mg-O 2 Battery 23mA / cm 2 During constant current discharge, H 2 -O 2 Battery performance such as Figure 4 shown.

[0030] Mg-O 2 Current density 23mA / cm 2 When discharging with constant current, its output power is 300mW. After 5 minutes of discharge in a magnesium-oxygen battery, the H 2 -O 2 When the fuel cell anode potential gradually rises to 1.15V, start testing H 2 -O 2 Fuel cell discharge current-voltage curve ( Figure 4 ). h 2 -O 2 Battery current density 23mA / cm 2 When discharging, the maximum power density reaches 12.6mW / cm 2 , the reco...

Embodiment 3

[0033] The metal anode 1 of the metal oxygen battery adopts the anode with a purity of 99.96% Al, and the electrolyte uses 4N NaOH and 0.05M Na 2 SnO 3 Solution, other conditions are with embodiment 2.

[0034] Al-O 2 When the battery is not discharged, because Al has a certain corrosion in 4N NaOH solution, H 2 -O 2 The open circuit voltage of the fuel cell can reach 0.86V. Al-O 2 Battery current density 23mA / cm 2 When discharging with constant current, its output power is 321mW. in Al-O 2 After the battery is discharged for 5 minutes, the H 2 -O 2 When the open circuit voltage of the fuel cell gradually rises to 1.21V, start testing H 2 -O 2 Fuel cell discharge current-voltage curve ( Figure 5 ). h 2 -O 2 Fuel cell current density 25mA / cm 2 When discharging, the power density reaches 19.3mW / cm 2 , the recoverable energy is 115.8mW, accounting for Al-O 2 36.1% of battery power generation. Al-O 2 Battery at 23mA / cm 2 During electric dense discharge, the h...

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Abstract

The invention belongs to a high energy power supply technology and provides an integrated combined power supply of a metal oxygen cell / hydrogen-oxygen fuel cell, in order to solve the problems of corrosion and hydrogen evolution of an anode of the metal oxygen cell and enhance the energy utilization ratio. The integrated combined power supply of the metal oxygen cell / hydrogen-oxygen fuel cell is characterized by comprising two parts, including a main power supply metal oxygen cell and a hydrogen-oxygen fuel cell. The integrated combined power supply sequentially consists of a metal anode, an electrolyte cavity, a hydrogen-oxygen fuel cell anode, a diaphragm, a cathode and a cathode cavity, and a structure that two kinds of cell cathodes are integrated into a whole and two kinds of cell anodes share a same cell cavity is adopted. When the combined power supply generates power, a hydrogen by-product of the metal oxygen cell is directly used as fuel of the hydrogen-oxygen fuel cell, and therefore, the hydrogen by-product of the metal oxygen cell is eliminated in situ, and a part of energy can be recovered. Compared with the prior art, the invention has the advantages of simple structure and convenient use and maintenance and is suitable for an emergency power supply and an underwater power supply which need high energy.

Description

technical field [0001] The invention relates to high-energy power supply technology, especially high-energy power supply for emergency power supply and underwater power supply. The invention mainly aims at solving the problem of metal oxygen cell anode corrosion and hydrogen evolution, and improving the battery energy utilization rate of metal oxygen, and proposes a metal oxygen cell-hydrogen fuel cell integrated power supply and a technical solution. Background technique [0002] A metal oxygen (or air) battery uses a metal anode as fuel and oxygen as an oxidant to convert the chemical energy of the fuel into electrical energy. It consists of a metal anode, a salt or alkaline aqueous electrolyte, and an oxygen cathode. Commonly used metal anode materials are Mg, Al, Zn, Fe, Li and their alloys, and the cathode active material is oxygen. The corresponding battery is called a magnesium-oxygen battery (Mg-O 2 ), aluminum-oxygen battery (Al-O 2 ), zinc-oxygen battery (Zn-O ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCY02E60/128
Inventor 孙公权杨少华杨维谦
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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