Scientists get better at monitoring battery charge
 

Apple's throttling will be obvious

Scientists at the University of Buffalo experimenting with next-generation battery designs have demonstrated how magnetism might be used to bring a new level of precision to the way we monitor a battery's state of charge.

The breakthrough hinges on a novel electrode design that induces shifts in a magnetic field as ions arrive and depart, which is can reveal battery life with a high degree of accuracy.

The team's advance stems from its investigations in a field known as magneto-ionics, which refers to an ability to use the transport of ions to control magnetism. The researchers see this phenomenon as a potential way to monitor the state of charge in lithium-ion batteries, which shuttle ions back and forth between a pair of electrodes as they are charged and discharged.

Using vanadium, chromium, and cyanide, the scientists created a novel magneto-ionic material, which they deployed as a "molecular magnetic electrode" in a lithium-ion battery. The material changes its magnetism as lithium ions enter and leave, and by using a ferromagnetic resonance testing unit, they were able to measure those changes to reveal the battery's charge level.

https://fudzilla.com/news/55052-scie...battery-charge