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Indian
origin scientist designs nanosized batteries
Sunday July 31, 2011 03:58:29 PM,
IANS
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Washington:
A team led by an Indian origin scientist has packaged lithium ion
batteries, which power mobiles and smartphones, into a single
nanowire. The breakthrough could be a valuable power source for
new generations of nanoelectronics.
Pulickel M. Ajayan, who did his B. Tech in metallurgical
engineering from Banaras Hindu University in 1985, India and Ph.D.
from Northwestern University US in 1989, had been inching towards
single nanowire devices for years.
These researchers at Rice University first reported the creation
of 3D nano batteries last December, the journal Nano Letters
reported.
"The idea here is to fabricate nanowire energy storage devices
with ultrathin separation between the electrodes," said Arava
Leela Mohana Reddy, study co-author and research scientist,
according to a university statement.
The team's experimental batteries are about 50 micrometres tall,
as thick as a human hair and almost invisible when viewed edge-on,
Reddy said.
Theoretically, the nanowire energy storage devices can be as long
and as wide as the templates allow, which makes them scalable.
The nanowire devices show good capacity. The researchers are
fine-tuning the materials to increase their ability to repeatedly
charge and discharge, which now drops off after about 20 cycles.
A nanometre is a billion of a metre.
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