Engineers have created an entirely new type of battery that could revolutionize the charging time and range of electric cars and other technologies that rely on lithium-ion batteries.
Nanoengineers at the University of California San Diego made a breakthrough by replacing the anodes on lithium-ion batteries, which are used in everything from smartphones to the space shuttle.
Despite silicon anodes having 10 times higher energy density, most commercial lithium-ion batteries use graphite anodes. The problem with silicon anodes is that they expand and contract as the battery is being charged and discharged, making them too unstable for use in most products.
The engineers were surprised to find that they were able to overcome this limitation by removing the liquid electrolyte and replacing it with a sulfide-based solid electrolyte.
“With this battery configuration, we are opening up a new field for solid-state batteries using permeation anodes such as silicon,” said Darren Tan of the University of California San Diego, who was lead author of the research.
“The solid-state silicon approach overcomes many limitations in conventional batteries. This presents exciting opportunities for us to meet the market demands for high volume energy, low cost and safe batteries, especially for grid energy storage. does.
The team was able to charge and discharge the new type of battery 500 times with 80 percent capacity retention at room temperature.
The silicon all solid-state battery technology has already been licensed by Unigrid Battery, a startup founded by Dr. Tan, to be further developed and hopefully to be commercialized eventually.
The paper titled ‘Carbon free high loading silicon anodes enabled by sulfide solid electrolytes’ is published in the journal Science. Science.
Credit: www.independent.co.uk /