Block’s Indicator of Sustainable Growth

by Ray Block

The European Union in a new vehicle strategy released last year is committed to spend E5 billion. The EU’s Green Car Initiative is designed in a multi prong approach to cut carbon emissions, and in providing financial support for research in electric and hybrid vehicles, encourage a growing number of electric cars on the market.

The International Energy Agency (IEA) forecast last year that sales of electric vehicles and plug-in hybrids should reach at least five million globally by 2020, which would catapult to a 50 per cent market share by 2050. Along these lines, Germany as the largest state in EU is planning on one million vehicles on its roads by 2020.

Nissan’s Leaf all-electric car, for release in 2011 was unveiled at the 80th Geneva International Motor Show in the March quarter 2010. Nissan has already flagged that the US price will be US$ 32,780, and there will be substantial discounts by the US and state governments.

As the first of the major car companies to offer electric cars in substantial volumes at a near affordable price, the Leaf promises zero tailpipe emissions, and a range of 160 km (100 miles) on a single lithium-ion battery charge. A 50 kW direct current charger will be available to charge the battery up to 80 per cent in under 30 minutes.

The compact AC electric motor in the front of the car driving the front wheels delivers a power output of more than 90 kW of power and 280 Nm (newton metres) of torque. Maximum speed is more than 140 km/h (90 mph).

Nissan is saying that a later model will have a range of 320 km (200 miles), but you may have to wait a long time for this to eventuate. In the meantime, US researchers are almost convinced that the next wave of electric car, with a long range on a single charge will come from a lithium air battery.

Three research laboratories- MIT in Cambridge (MA), IBM at the Almaden Research Centre in San Jose (CA), and Argonne National Laboratory, close to Chicago (IL) are all working on lithium air batteries. There is great promise about their research.

You can understand the enthusiasm when researchers say lithium-ion, the current vehicle battery choice, with its limited energy capacity, has the potential to deliver only about 585 watt-hours of electricity per kilogram. This compares with a lithium sulphur battery, with a theoretical potential of about 2,600 watt-hours, and lithium air batteries with an even higher potential of 5,000 watt-hours.

Currently, BYD, the Chinese car and battery producer has on the market an electric car with a lithium sulphur battery.

The MIT researchers in a paper published in the journal Electrochemical and Solid-State Letters, demonstrated that electrodes with gold or platinum as a catalyst in lithium air prototypes would also be substantially much lighter, a key issue for electric vehicles.

The future of electric cars seems unbounded.