A research team from South Korean research university KAIST has developed stable, high-rate lithium-sulfur batteries (LSBs) by using hierarchically porous titanium nitride (h-TiN) as a sulfur host. In a paper in the journal Advanced Materials, the researchers report that h-TiN/S shows a reversible capacity of 557 mAh g-1 even after 1,000 cycles at 5 C rate with only… Read more »
Silicon anodes are receiving a great deal of attention, as they can enable batteries to deliver 3-5 times higher capacities compared with current graphite anodes. Although silicon is abundant and cheap, Si anodes have a limited number of charge-discharge cycles – typically less than 100 times. Their volume expands enormously during each cycle, leading to… Read more »
The city of Gumi in South Korea has deployed two electric buses that use dynamic wireless charging. Dynamic wireless is a particularly exciting technology, as it has the potential to remove several of the objections associated with EVs. In a public transport context, it eliminates the need for unsightly overhead wires. Further down the road,… Read more »
Researchers from the Korea Advanced Institute of Science and Technology (KAIST) have discovered a means to extend the lifetime of lithium-air (Li-air) batteries, a technology that offers the promise of higher energy densities than those achievable with conventional lithium-ion batteries. They report their findings in the February issue of the journal ChemSusChem. Li-air batteries are… Read more »
The Korea Advanced Institute of Science and Technology (KAIST) and the Korea Railroad Research Institute (KRRI) have developed a wireless power transfer technology that can supply 180 kW of power at 60 kHz. KAIST first tested its On-line Electric Vehicle (OLEV) in 2009, and has made substantial improvements in size and charging power since then…. Read more »