Sodium ion battery uses carbon waste from tyres
Researchers at Oak Ridge National Laboratory have shown a sodium ion battery that can serve as a low-cost, high performance substitute for rechargeable lithium-ion batteries commonly used in robotics, power tools, and grid-scale energy storage.
The researchers at ORNL developed the sodium ion battery by pairing a high-energy oxide or phosphate cathode with a hard carbon anode and achieved 100 usage cycles at a one hour charge and discharge rate.
“The dedication to lithium-ion batteries over the past 20 years has eclipsed any significant development around room temperature sodium-ion batteries despite the material availability,”said Ilias Belharouak at ORNL. “This research shows how SIBs can be designed for improved performance.”
The carbon anodes, demonstrated as a technology in 2016, are derived from waste vehicle tyres, processed at 1100 ºC, 1400 ºC and 1600 ºC which showed energy capacities of 179, 185 and 203 mAh/g.
Sodium ion battery technology is a key area of research and development as a result of the lower cost of the materials and safer operations with companies such as Faradion and LiNa Energy at the University of Lancaster in the UK working on the technology.
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