<
https://reneweconomy.com.au/researchers-discover-simple-secret-to-extend-battery-lifespans-by-50-pct/>
"Researchers in the United States have discovered a simple method of extending
the lifespan of lithium-ion batteries by as much as 50 per cent.
In a study published in late August in the journal
Joule, researchers from
the SLAC-Stanford Battery Center in the United States discovered that charging
lithium-ion batteries at high currents just before they leave the factory can
increase their average lifespan by 50 per cent.
Using scientific machine learning, a type of artificial intelligence (AI), the
researchers were able to determine the why behind the discovery.
The study, ‘Data-driven analysis of battery formation reveals the role of
electrode utilization in extending cycle life’, was also described in an
article published by the SLAC-Stanford Battery Center, which outlined the
discovery and the ways in which it may help to optimise battery manufacturing.
When a battery first leaves the factory, the positive electrode of a newly
minted battery is 100% full of lithium, but every time a battery goes through a
charge-discharge cycle, some of the lithium is deactivated.
According to one of the researchers, Xiao Cui, minimising the lithium
deactivation losses is key in prolonging the battery’s working lifespan.
The first charge a lithium-ion goes through causes the creation of a layer
called the solid electrolyte interphase (SEI) that forms on the surface of the
negative electrode during the first charge. Subsequently, the SEI layer
protects the negative electrode from side reactions that would otherwise
accelerate the lithium loss and accelerate the battery’s degradation.
Getting this SEI layer just right is therefore vitally important and is known
as the ‘formation charge’."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
