Brighsun’s Li-S Batteries to enter industrial trials
Lithium Sulfur (Li-S) Battery Technology Breakthrough Through nearly 8 years of research, the Australian company Brighsun’s team, developed lithium-sulfur (Li-S) batteries with an energy density 5-8 times higher than conventional secondary batteries. According to results from an internationally accredited testing agency (SGS), Brighsun’s new technology allows an Li-S battery to keep 91% of its initial capacity after 1,700 cycles at a rate of 2C (being fully charged/discharged in 30 mins). That means the capacity decay per cycle is as low as 0.01%. Even at a more aggressive rate of 5C (being fully charged/discharged in 12.5 mins), Brighsun’s Li-S battery retains 74% of its initial capacity after 1,000 cycles (capacity decay per cycle of 0.026%). The cathode energy density for the 1th cycle after activation at charge rate of 1C is 2103.8Wh/kg. Driven by the growing markets world-wide for EVs, the battery industry has explored a range of chemical combinations: lithium iron phosphate, lithium cobalt oxide and, currently, nickel manganese cobalt. However, current battery systems still suffer from the major disadvantages of relatively low energy density, high raw material costs and secondary pollution during recycling. A Game Changer Brighsun’s advanced Li-S chemistry, offering high energy density and resultant low raw material costs, will be a game changer in the EV industry. Li-S batteries also have the potential to become the most promising energy storage systems for future railways, ships and airlines. Industries such as electric supply grid storage, mobile phones, drones and AI will also benefit from dramatically higher energy density storage provided by Brighsun’s new battery system. Companies in the US, Germany, Korea and China have been developing Li-S batteries and have achieved promising breakthroughs. However, these systems still face a number of challenges, including volume expansion of cathode materials during cycling, the shuttling effect of polysulfides, and the dendritic […]