Abstract for "DEVELOPMENT OF AIR METAL HYDRIDE BATTERY"
The aim of the project is to develop an air metal hydride battery which meets the performance targets of part 2.4.A.2.1.1. of the JOULE Workprogramme.
The air metal hydride battery is composed of a metal hydride electrode and a catalytic air electrode using oxygen from the atmosphere. During charge water is split into hydrogen and oxygen. The hydrogen is stored in a special metal alloy. During discharge the process is reversed and water is formed. With such an air breathing system a very high specific energy (Wh/kg) is possible. The overall capacity is proportional to the capacity of the metal hydride which is high compared to most other available rechargeable electrodes.
The idea of an air metal hydride battery dates back to the seventies, but the relatively few attempts to make such a battery have not been very successful yet according to the literature. Nevertheless, some of the partners in the present proposal have worked with the idea since 1988 and developed and patented a very promising concept based on an allcaline aqueous electrolyte.
Complete batteries packs of 24 V, 21 Ah, 360 W have been constructed and a specific energy of 86 Wh/kg, an energy density of 120 Wh/l, a sustained specific power of 61 W/kg and 150 discharge cycles have been obtained. The consortium has reason to believe that the result obtained represents the state-of-the-art word wide for this battery system. These figures are a strong proof of principles but the battery still needs a large amount of further development to be of commercial interest and to meet the JOULE performance targets.
The proposing consortium is composed of partners from 4 EU member states and 1 associated state, to ensure the maximum expertise on all the technical aspects of the varied components of the battery. The consortium is also made with a balanced participation of universities and industries to direct it towards commercialisation.
Judging from the massive success of the nickel metal hydride battery the air hydride battery will have great opportunities as a next generation hydride battery.
Funding SchemeCSC - Cost-sharing contracts
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