Adafruit will not be shipping orders Martin Luther King Jr. Day, Monday January 21, 2019. Any expedited orders placed after 11am ET Friday January 18 will go out Tuesday January 22.
0

Messy Innards Make for a Better Lithium Ion Battery

NewImage

Sometimes is pays off to be a little messy…espcially if you’re a lithium ion battery. Via Scientific American.

Inside a lithium-ion battery, you might not want to keep everything neat and tidy; a little bit of disorder may improve its performance, according to new research.

Engineers meticulously arrange materials in rigid patterns in typical lithium-ion cathodes and anodes, the idea being that a more structured arrangement yields a more efficient battery. In the pursuit of greater energy densities, better performance and longevity, designers are seeking ways to structure battery components more rigorously and at smaller scales.

Letting material layers blend or lose their shape often corresponds to weaker battery performance, a situation that arises as these devices age. The lithium ions have a harder time moving through the cathode and thereby deliver less energy.

“This understanding and experimental evidence has generally led battery scientists to overlook disordered materials,” explained Jinhyuk Lee, a research assistant in materials science and engineering at the Massachusetts Institute of Technology.

However, he found that in some circumstances, disruption could have performance benefits. Lee and his collaborators published their findings last week in the journal Science.

“In this paper, we found a particular composition that when it becomes disordered, it can still have a good performance,” said co-author Dong Su, a staff scientist in the electron microscopy group at Brookhaven National Laboratory.

Researchers used a blend of lithium, chromium and molybdenum for the cathode, initially alternating between lithium and transition metal oxide layers. After charging and discharging the battery a few times, they found the performance remained steady.

What made this battery design work so well with a disordered structure compared to previous designs was the presence of excess lithium. Conventional lithium-ion batteries use equal amounts of lithium and a given transition metal. With the new formula, the extra lithium finds its own path through the cathode, creating faster channels for the ion and delivering a more consistent performance.

Read more.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 9,700+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

What do you want from CircuitPython in 2019?

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — A field guide to designing your PCBs, learned the hard way

Wearables — A glowing start point

Electronics — Current limiting!

Biohacking — A Gene to Predict Modafinil Response

Python for Microcontrollers — Python snakes its way on the SparkFun SAMD21 Mini, Hackaday.io, 10k thanks, and Tim’s magazine #Python #Adafruit #CircuitPython @circuitpython @micropython @ThePSF @Adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.