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Battery breakthrough could keep phones charged for five days

Georgia Fryer

Australian researchers claim they have developed a lithium-sulphur (Li-S) battery capable of charging a phone for five days or powering an electric car for 1,000 km.

A team from Monash University are on the edge of commercialising a battery that could “outperform current market leaders by more than four times, and power Australia and other markets well into the future.”

Dr Mahokht Shaibani, from the Department of Mechanical and Aerospace Engineering, led the team that developed a Li-S battery that has better performance and less environmental impact than standard lithium-ion batteries.

Professor Mainak Majumder said this “development is a breakthrough for the Australian industry and could transform the way phones, cars, computers and solar grids are manufactured in the future.”

“Successful manufacture and implementation of Li-S batteries will capture a more significant part of the estimated $231bn value chain of Australian lithium, and will revolutionise the Australian market and provide all Australians with a cleaner and more reliable energy market,” Professor Majumder explained. 

However, Dr Shaibani says this technology has not yet succeeded due to factors such as the insulating nature of sulphur, the large expansion of sulphur and the instability of lithium metal anode.

The researchers claim they have engineered a method that creates bonds between particles to accommodate stress and deliver a level of stability not yet seen in any battery.

“Similar sorts of breakthroughs on the stabilisation of lithium electrodes is vital to increase the life-time of this next-generation battery technology to the required levels,” Dr Shaibani explains.

“The only viable path towards a greener, more sustainable and more ethical battery is rooted in our ability to design electroactive materials that have comparable performances to today’s electrodes, but cost less energy, release less CO2 during production and have global material abundance,” she said.

According to Dr Shaibani, the battery’s use of commonly-sourced and extremely cheap materials, ease of processing, and proven prototypes make the design of expansion-tolerant electrodes promising for scale-up.

The team have an approved filed patent for their manufacturing process and German partner Fraunhofer Institute for Material and Beam Technology (IWS) has successfully manufactured prototype cells. 

According to Dr Shaibani, prototype cells are being developed in Australia as of late 2019.

However, more development of the Battery Management System (BMS) for Li-S batteries is needed before this testing can take place in large-scale applications, Dr Shaibani explains.

The team have received more than $2.5m in funding and are now working with a team of Electrical Engineers to develop the suitable BMS needed to trial the batteries in electric vehicles (EV) and grids Dr Shaibani says.

“Our priority is EV and grids. This is because we need radical new and clean energy storage technologies to fight climate change in countries such as Australia where sustained climate change could have drastic effects on the ecosystems and people's lives,” she noted.

The research team is hoping to introduce a product in 2-4 years. 

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