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Old 10-10-2019, 05:38 PM
Astronovice (Calvin)
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Join Date: Jun 2017
Location: Cairns Northern Beaches
Posts: 81
Vanadium Redox battery

Whilst lithium ion batteries will undoubtably play an increasing part of the immediate future it is likely that vanadium redox batteries will increasingly take over the storage role in large energy storage projects.

As the storage market continues to expand ever more rapidly then emphasis on system safety will increase. There has already been a number of explosions and subsequent fires involving lithium ion battery systems, such as the one in the 2MW solar / energy storage grid connected facility in Surprise, Arizona in April this year. The vanadium redox system carries none of this risk, being inherently stable. It also has the advantage of being capable of ten times the number of charge / discharge cycles before failure when compared to lithium ion batteries.

The vanadium redox battery is about twice as expensive to manufacture as lithium ion but has a much longer life cycle capability. Being a liquid electrolyte based system allows it to be charged whilst it is discharging via an electrolyte exchange process. These properties lend it to large storage systems, although 10kW modules are available.

The vanadium redox battery was invented by Professor Maria Skyllas-Kazacos, who graduated from UNSW with an industrial chemistry engineering degree in 1974, winning the university medal in the process.
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