Rechargeable lithium-ion batteries (LIBs) are projected to meet future electric mobility, electric aviation and stationary grid energy storage targets within 2030. However, LIBs need toxic and costly metals like cobalt, nickel, manganese, etc., for functioning.
In the dual carbon battery developed by IIT-H, the researchers have utilised self-standing carbon fiber mats as both electrodes (cathode and anode). This may down the overall battery cost by 20-25 per cent and is expected to curb the unpredictability in market price. Use of carbon as electrode active material as well as current collector replacing heavy metals also make the battery light and flexible.
The fabricated 5.0 voltage (nominal voltage 4.6 V) cell provides an energy density of approximately 100-watt hour per kilogram and can be extended up to 150-watt hour per kilogram with further modifications.
“The study will be extrapolated to push the energy density limits further and their broad vision includes introducing the dual carbon system as a cheaper LIB alternative to the Indian market,” said Surendra Kumar Martha, associate professor, department of chemistry and lead investigator of the research team.
The research was supported by the Naval Research Board (Defence Research and Development Organisation) and was recently published in Advanced Energy Material, a peer-reviewed journal.