Tesla Developing Batteries for 1 Million Miles

As per IHS Markit, 20% of all Chinese vehicles are expected to have some sort of electrification by 2025. The UK and France are well on way to stop sale of Greenhouse gas emitting vehicles by 2040. As a result, a lot of research is going on into developing more efficient batteries which can last longer. Reason, while cost and complexity of an electric power train is much less than a petrol or diesel power train, the fuel, that is batteries cost a bomb. They account for nearly 50% of the cost of an electric vehicles. Also, unlike petrol or diesel fuel tank, the battery has a fixed life and needs to be replaced at end of the life. Hence a longer lasting battery would bring down the cost of ownership of the vehicle.

Tesla has been making cars which can go the most on a single charge. Their cars have ranges between 525 to 600 km on a charge. They achieve this using cylindrical cells as well as liquid cooling for their batteries as compared to the cheaper option of air cooling by most other manufacturers. Their present batteries can last up to 800,000 km. However, a new research paper from Dalhousie University in Nova Scotia, Canada claims that the Jeff Dahn-led team is close to creating a lithium-ion battery that can run a car for over 1 million miles or 1,600,000 km.

The batteries being developed by Tesla use lithium nickel manganese cobalt oxide or NMC as the cathode (positive electrode) of the battery and artificial graphite as the anode (negative electrode) of the battery. NMC/graphite chemistries have long been known to increase the energy density and lifespan of lithium-ion batteries, reports wired.com

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