Category Chemistry/Nanotechnology

Test set-up for the solid-state battery: the battery of the size of a button cell is located in the middle of the acrylic glass casing, which ensures permanent contact with the battery.
Credit: Forschungszentrum Jülich / Regine Panknin

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Scientists have now introduced a new concept that allows currents up to 10X greater during charging and discharging than previously described in the literature.

The low current is considered one of the biggest hurdles in the development of solid-state batteries...

Sagar Doshi (left) and Erik Thostenson test an elbow sleeve outfitted with one of their novel sensors.
Credit: Kathy F. Atkinson

Engineers use carbon nanotube composite coatings. A team of engineers at the University of Delaware is developing next-generation smart textiles by creating flexible carbon nanotube composite coatings on a wide range of fibers, including cotton, nylon and wool. Their discovery is reported in the journal ACS Sensors where they demonstrate the ability to measure an exceptionally wide range of pressure – from the light touch of a fingertip to being driven over by a forklift.

Fabric coated with this sensing technology could be used in future “smart garments” where the sensors are slipped into the soles of shoes or stitched into clothing for detecting human motion...

Qingkun Liu, a postdoctoral research associate at CU Boulder, holds up samples of a new gel that could improve the energy efficiency of windows across the United States.
Credit: CU Boulder

A new, super-insulating gel developed by researchers at CU Boulder could dramatically increase the energy efficiency of skyscrapers and other buildings, and might one day help scientists build greenhouse-like habitats for colonists on Mars. The “aerogel,” which looks like a flattened plastic contact lens, is so resistant to heat that you could put a strip of it on your hand and a fire on top without feeling a thing. But unlike similar products on the market, the material is mostly transparent.

“Transparency is an enabling feature because you can use this gel in windows, and you could use it in extraterres...

When two monolayers of WTe2 are stacked into a bilayer, a spontaneous electrical polarization appears, one layer becoming positively charged and the other negatively charged. This polarization can be flipped by applying an electric field.
Credit: Joshua Kahn

Researchers report that the 2D form of tungsten ditelluride can undergo ‘ferroelectric switching.’ Materials with ferroelectric properties can have applications in memory storage, capacitors, RFID card technologies and even medical sensors – and tungsten ditelluride is the first exfoliated 2D material known to undergo ferroelectric switching.

2D materials can be prepared in crystalline sheets as thin as a single monolayer, only one or a few atoms thick...