New era of rechargeable batteries soon: Indian-origin engineer
Gurpreet Singh, an assistant professor of mechanical and nuclear engineering at Kansas State University in the US, has made a breakthrough in developing cheaper sodium ion batteries in the future.
Singh and his team have demonstrated that a composite paper - made of molybdenum disulfide and graphene nanosheets - can work both as an active material to efficiently store sodium atoms and a flexible current collector.
The composite paper can be used as a negative electrode in sodium-ion batteries - a boon for flexible batteries and supercapacitors.
In contrast to lithium, sodium supplies are essentially unlimited and the batteries are expected to be a lot cheaper.
Most negative electrodes for sodium-ion batteries use materials that undergo an 'alloying' reaction with sodium.
"These materials can swell as much as 400 to 500 percent as the battery is charged and discharged, which may result in mechanical damage and loss of electrical contact with the current collector," explained Singh.
"Molybdenum disulfide offers a new kind of chemistry with sodium ions," he added.
"The paper electrode offers stable charge capacity with respect to total electrode weight. Further, the interleaved and porous structure of the paper electrode offers smooth channels for sodium to diffuse in and out as the cell is charged and discharged quickly.
"This design also eliminates the polymeric binders and copper current collector foil used in a traditional battery electrode," he added.
The research marks the first time that such a flexible paper electrode was used in a sodium-ion battery as an anode that operates at room temperature.
Most commercial sodium-sulfur batteries operate close to 300 degrees celsius, Singh said.
The researchers are now working to commercialise the technology.
(Posted on 30-01-2014)
Information on States of India:
Andaman Nicobar | Andhra Pradesh | Assam | Bihar | Chandigarh | Chhattisgarh | Dadar Nagar Haveli | Daman Diu | Delhi | Goa | Gujarat | Haryana | Himachal Pradesh | Jammu Kashmir | Jharkhand | Karnataka | Kerala | Lakshadweep | Madhya Pradesh | Maharashtra | Manipur | Meghalaya | Mizoram | Nagaland | Orissa | Pondicherry | Punjab | Rajasthan | Sikkim | Tamil Nadu | Tripura | Uttar Pradesh | Uttaranchal | West Bengal
INDIA REGIONAL MAPS:
Andhra Pradesh Travel Map | Bihar Travel Map | Goa Travel Map | Gujarat Travel Map | Haryana Travel Map | Himachal Pradesh Map | Karnataka Travel Map | Kerala Travel Map | Maharashtra Travel Map | Punjab Travel Map | Rajasthan Travel Map | Sikkim Travel Map | Tamil Nadu Travel Map | Uttar Pradesh Travel Map | West Bengal Travel Map |
MORE MAPS OF INDIA:
INDIA CITY MAPS:
KERALA TRAVEL MAPS: