With just one week under our belts in this New Year, we already have some world-record news in relation to lithium-ion (Li-ion) batteries and nanoparticles. Researchers at Stanford University and the SLAC National Accelerator Laboratory have developed a Li-ion battery in which its sulfur cathode was capable of storing five times more energy than is possible with today’s commercially available batteries.
The research—not surprisingly—was led by Stanford’s Yi Cui. What may be somewhat surprising is that Cui has focused his attention in this research on the cathode rather than the anode of the battery. Much of Cui’s most recent work has been on improving the anodes of Li-ion batteries through the use of nanostructured silicon. In this latest research, he has not only shifted his attention to the cathode, but also developed an entirely new material to do it.
The new material, which is described in the Jan. 8 edition of Nature Communications (“Sulphur–TiO2 yolk–shell nanoarchitecture with internal void space for long-cycle lithium–sulphur batteries”), is a nanoparticle that is made up of an inner core of sulfur surrounded by an outer layer of porous titanium-oxide. The nanoparticles architecture resembles that of the yolk and shell of an egg.