Technology to Improve the Performance of Lithium-Ion Cells at Low Temperatures
Small Business Information
15 Acorn Park, Cambridge, MA, 02140
AbstractHybrid electric vehicles (HEVs), plug-in hybrid-electric vehicles (PHEVs), and electric vehicles (EVs) are key technologies for reducing the nationÂ¿s dependence on imported petroleum, reducing greenhouse-gas emissions and air pollution, and conserving petrochemical feedstocks. Because lithium-ion batteries have a higher energy density relative to the presently-used nickel-metal hydride batteries, lithium-ion batteries have the potential to extend the range of these vehicles, while also reducing battery mass and size. In particular, lithium iron phosphate Â¿ which offers much higher safety, higher abuse tolerance, longer cycle life, and lower cost Â¿ presents an opportunity to accelerate the introduction of lithium-ion batteries for automotive applications. However, the low-temperature performance of present lithium iron phosphate materials does not meet the targets of the U.S. Advanced Battery Consortium. This project will conduct a study to improve the low-temperature performance of lithium iron phosphate. Phase I targeted the activation energy for transport processes, as a potential pathway for improving the low-temperature performance of lithium iron phosphate. Phase II will continue the strategies identified in Phase I and develop a material that meets the requirements for automotive batteries at low temperature. Commercial Applications and other Benefits as described by the awardee: Because of its great advantages in cost and safety relative to presently-used, metal-oxide cathode materials, an improved lithium-iron-phosphate cathode would accelerate the introduction of lithium-ion batteries for hybrid electric vehicle applications. In a field currently dominated by a few Asia-based companies, this technology may allow the U.S. to reclaim large parts of the lithium-ion battery market
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