The explosive history of lithium ion batteries @whitehouse @mfgday #MFGDay16
In the wake of Samsung’s recent lithium ion battery controversy, Slate takes a look at interesting place the batteries occupy in the world of modern manufacturing history.
In essence, the difference between a handy lithium battery and an incendiary one can be boiled down to three things: how industry manufactures these devices, how it integrates them into the applications they power, and how users treat their battery-containing appliances. When a lithium rechargeable discharges, lithium ions layered onto the negative electrode or anode (typically made of graphite) lose electrons, which go into an external circuit to do useful work. The ions then migrate through a conductive material known as an electrolyte (usually an organic solvent) and become lodged in spaces in the positive electrode or cathode, a layered oxide structure.
There are a variety of lithium battery chemistries, and some are more stable than others. Some, like lithium cobalt oxide, a common formula in consumer electronics, are very flammable. When such variants do ignite, the result is a blaze that can be difficult to extinguish owing to the battery’s self-contained supply of oxidant.
We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @ adafruit.com/blacklivesmatter
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, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, 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.