Better Baking Puts the "Super" in Chip-Scale Supercapacitor

Solid-state devices benefit from better batter and adjustments in cooking time and temperature

3 min read
Better Baking Puts the "Super" in Chip-Scale Supercapacitor

microsupercapacitor fig 1

Illustration: John Chmiola/Drexel University
Click on the image to enlarge.

28 April 2010—With the advent of microelectromechanical systems (MEMS) and even tinier nanoelectromechanical systems (NEMS), the days of inserting a couple of AA batteries into a gadget and calling it a day are, at best, in technology’s side-view mirror. Supercapacitors hold a lot of promise as the successor to batteries, because they can be charged and discharged rapidly, don’t lose energy capacity when they’re recharged after incomplete discharges, and can stand up to an infinite number of charge-discharge cycles. Try as they might, though, engineers haven’t been able to design one whose energy storage capacity isn’t woefully meager compared to batteries.

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The Transistor of 2047: Expert Predictions

What will the device be like on its 100th anniversary?

4 min read
Six men and a woman smiling.

The luminaries who dared predict the future of the transistor for IEEE Spectrum include: [clockwise from left] Gabriel Loh, Sri Samavedam, Sayeef Salahuddin, Richard Schultz, Suman Datta, Tsu-Jae King Liu, and H.-S. Philip Wong.


The 100th anniversary of the invention of the transistor will happen in 2047. What will transistors be like then? Will they even be the critical computing element they are today? IEEE Spectrum asked experts from around the world for their predictions.

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