June 08, 2023

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Low-cost 5V dual carbon battery development for EV 

5V dual carbon battery

Low-cost 5V dual carbon battery development for EV 

A 5V Dual Carbon Battery that uses self-standing carbon fibre mats as both electrodes such as cathode and anode has been developed by the Electrochemical Energy Storage Lab at the Indian Institute of Technology Hyderabad (IITH).

The model has been developed by a team led by Dr Surendra Kumar Martha. This battery doesn’t need any of the toxic metals that are costly and heavy. It is the most sustainable and low-cost battery that can be used in high-voltage applications, battery-operated medical devices, stationary grids and regenerative braking systems in electric vehicles.

Lithium-ion batteries need toxic and costly metals such as manganese, cobalt and nickel but these are costly to be used in electric vehicles. But the battery made by IITH doesn’t contain any toxic material and it will lower down the costs to at least 20-25%.

These batteries are light and flexible due to the ubiquitous carbon use in place of electrode active material and collector lets skip the use of heavy materials. Its 5.0 V cell provides around 100-watt hour per kilogram of energy density and can be increased up to 150- watt-hour per kilogram.

In 2019 the IIT Hyderabad has collaborated with ItsEV Inc to develop lithium-ion batteries for various applications including electric vehicles. Both the companies IITH and ItsEV are expecting to make a superior lithium-ion battery comparing to the existing ones in India.

A research group led by Surendra K. Martha, Associate Professor, Department of Chemistry, IIT Hyderabad showed that high-energy lithium-ion batteries have double energy than the batteries produced in 2018. The researchers also demonstrated the 100-200 mAh sodium-ion cells at the Research Centre Imarat (RCI) in the Defence Research and Development Organisation (DRDO) laboratory, in Hyderabad.

Jayesh Ranjan, Principal Secretary, Industries, Telangana, said, “Telangana is among the first 10 states to work on policies for the 100 per cent adoption of EV for public transport. This would motivate individuals to go for EV, which would help in reducing problems such as traffic management and pollution. The introduction of a product like this can be a breakthrough.”

As batteries are the costliest component of an electric vehicle due to lack of lithium reserves India imports lithium-ion batteries from China, South Korea, Japan and Europe. As this new battery technology is developing and once it enters into commercialisation we need not rely on any other country for lithium-ion.

CART researching on driverless electric cars

Whereas IIT Delhi is also making all efforts. The institute’s Centre for Automotive Research and Tribology (CART) is researching driverless cars to make India completely a hub of electric vehicles.

It has also set up a 20kW charging station with an inbuilt solar photovoltaic interface which is developed by Smart Grid Lab of the department of electrical engineering. The Centre’s department of science and technology have funding for it.

Recently, the IIT incubated start-up Geliose Mobility has launched an affordable electric scooter ‘Hope’

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