Chem-e-carAluminium air battery

Amar ChandAshutosh KushwahaAkul JainKunal-IIT Roorkee

Why Al-Air Battery?Nowadays vehicles are creating about 60%

pollution on this earth. If the pollution has to be controlled than

vehicles should be run by other methods that causes very less or negligible pollution.

There are various other methods. One of them is to create a new type of chemical reaction which helps the vehicle to move. Our project "chemecar" is based on it.

Our chemecar is based on a method which has a basic mechanism of converting chemical energy to electrical energy which is then converted to mechanical energy.

MechanismAluminum-Air batteries or Al-Air

batteries produce electricity from the reaction of oxygen in the air with aluminium.

A chemical reaction with b/w Al and salt water is oxidising Al and creating electrons.

Activated carbon provides a surface for air from the atmosphere to reduce which requires electrons.

ElectrochemistryThe anode oxidation half-reaction is:

Al + 3OH−→ Al(OH)3 + 3e− +2.31 V.

The cathode reduction half-reaction is:

 O2 + 2H2O + 4e− → 4OH−+0.40 V.

The total reaction is

4Al + 3O2 + 6H2O → 4Al(OH)3 + 2.71 V.

Aluminium as a fuelThe Al/air battery system can generate

enough energy and power for driving ranges and acceleration similar to gasoline powered cars.

The total fuel efficiency during the cycle process in Al/air electric vehicles (EVs) can be 15% (present stage) or 20% (projected), comparable to that of internal combustion engine vehicles (ICEs) (13%).

They have one of the highest energy densities of all batteries.

Aluminium as a fuel

Aluminium–air batteries are primary cells; i.e., non-rechargeable. Once the aluminium anode is consumed by its reaction with atmospheric oxygen, the battery will no longer produce electricity.

However, it is possible to mechanically recharge the battery with new aluminium anodes made from recycling the hydrated aluminium oxide.

Aluminium as a fuelIn March 2013, Phinergy created an

electric car using aluminium-air cells driven 330 km using a special cathode and potassium hydroxide.

These batteries can be used, for example, as reserve batteries in telephone exchanges and as backup power sources. Al–air batteries could be used to power laptop computers and cell phones and are being developed for such use.

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