Anxiety in the district, the fear of running out of electricity before charging an electric vehicle, may be a thing of the past, with a 250-kilometer range of lithium iron phosphate batteries being studied by a team of Penn State engineers studying 10 minutes.
“We have developed a fairly clear battery for mass-market electric vehicles that are cost-effective with motor vehicles,” said Chao-Yang Wang, chair of mechanical engineering at William E. Diefenderfer, professor of chemical engineering and materials science and engineering, and Penn State Electrochemical Motor Center. Director. “There’s no more anxiety and this battery is cheap.”
Researchers also said the battery should be good for 2 million miles of life.
It was announced today (January 18, 2021) in the year Energy of Nature The key to long life and fast charging is the ability of the battery to heat up quickly to 140 degrees Fahrenheit, charge and discharge, and then cool down when the battery does not work.
“Very fast charging allows you to lower the battery without creating anxiety in the range,” Wang said.
The battery uses a pre-heated approach developed earlier at the Wangen Center. The heat sink battery uses a thin sheet of nickel to connect one end to the negative terminal and the other to extend outside the cell to create a third terminal. When electrons pass through it quickly heats the nickel foil by heating the resistor and heats the inside of the battery. When the internal temperature of the battery is 140 degrees F, the switch will open and the battery will be ready to charge or discharge quickly.
Wang’s team modeled this battery using existing technologies and innovative approaches. Using this heating method, they can use low-cost materials for battery cathodes and anodes and a safe low-voltage electrolyte. The cathode is thermally stable, lithium iron phosphate, and has no expensive and critical materials like cobalt. The anode is made of very high particle graphite, a safe, lightweight and inexpensive material.
Due to self-heating, the researchers said they should not worry about irregular lithium deposition in the anode, which can lead to dangerous lithium nails.
“This battery has reduced weight, volume and cost,” Wang said. “I’m very pleased that we’ve finally found a battery that will benefit the major consumer market.”
According to Wang, these smaller batteries can generate a large amount of energy when heated – 40 kilowatt hours and 300 kilowatt power. An electric vehicle with that battery could travel 60 miles per hour in 3 seconds and would travel like a Porsche, he said.
“This way we will change the environment and not just help in luxury cars,” Wang said. “Let everyone pay for electric vehicles.”
Reference: January 18, 2021, Energy of Nature.
DOI: 10.1038 / s41560-020-00757-7
Other Penn State researchers working on this project have been Xiao-Guang Yang, an assistant researcher in mechanical engineering, and Teng Liu, a doctor of mechanical engineering.
The U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy and William E Diefenderfer Endowment contributed to this research.