X Close
Untitled Document
 
Nano digest is a great step to popularize the nanoscience activities and programmmes..

subhranshu sekhar samal
scientist-C , CNSNT, sathyabama University
Read more...  
International Conference on Biotechnology and Nanotechnology (ICBN 2011)
Euro Nano Forum 2011,
International conference on Recent Advance in Physics for Interdisciplinary Developments(RAPID-2014
Nanomaterials 2011
The Fourth International Meeting on Dielectric Materials (IMDM’4)
More events...
Untitled Document
 
   News
Self-healing Battery Anodes
Tue, 16 May 2017
Researchers at the University of Illinois have found a way to apply self-healing technology to lithium-ion batteries to make them more reliable and last longer.

The group developed a battery that uses a silicon nanoparticle composite material on the negatively charged side of the battery and a novel way to hold the composite together -- a known problem with batteries that contain silicon.

Materials science and engineering professor Nancy Sottos and aerospace engineering professor Scott White led the study published in the journal Advanced Energy Materials.

"This work is particularly new to self-healing materials research because it is applied to materials that store energy," White said. "It`s a different type of objective altogether. Instead of recovering structural performance, we`re healing the ability to store energy."

The negatively charged electrode, or anode, inside the lithium-ion batteries that power our portable devices and electric cars are typically made of a graphite particle composite. These batteries work well, but it takes a long time for them to power up, and over time, the charge does not last as long as it did when the batteries were new.

"Silicon has such a high capacity, and with that high capacity, you get more energy out of your battery, except it also undergoes a huge volume expansion as it cycles and self-pulverizes," Sottos said.

Past research found that battery anodes made from nanosized silicon particles are less likely to break down, but suffer from other problems.

"You go through the charge-discharge cycle once, twice, three times, and eventually you lose capacity because the silicon particles start to break away from the binder," White said.

To combat this problem, the group further refined the silicon anode by giving it the ability to fix itself on the fly. This self-healing happens through a reversible chemical bond at the interface between the silicon nanoparticles and polymer binder.

"This dynamic re-bonding process essentially holds the silicon particles and polymer binder together, significantly improving the long-term performance of the electrode," Sottos said.

The researchers tested their new battery against one that does not use the reversible chemical bonding and found that it retains 80 percent of its initial capacity, even after 400 cycles.

These batteries also have a much higher energy density, meaning that they can store more electricity than a graphite-anode battery of the same size.

"The higher the energy density, the better. The other option is to add more batteries, but that gets heavy and is an issue with electric cars, in particular," Sottos said.

Courtesy: ScienceDaily

   
Other News
Water forms `Spine of Hydration` around DNA
Mass-Producible Quantum Computers
Nanoscale Examination of a Living Cell Membrane
Insulating Nanomagnets Driven by Spin Torque
Water is surprisingly ordered on the nanoscale
Math, Biology and Nanotechnology
Energy Decay in Graphene Resonators
First flat lens for immersion microscopy
Oddball Enzyme to Build new Biomaterials out of DNA
Nano Fiber feels forces, hears sounds
First `Nanotherapeutics` Drug Delivered to a Tumor
Precision Control using Magnetic Molecules
Anticancer Nanomaterials
New Computer Chips
Stretchable Hologram
Beautiful, Consistent Carbon Belts
Nanoscale Imaging
Subatomic Scale
Wood filter
Slingshot
`Hot` electrons
More Wfficient Catalytic Material Developed
New material changes to the environment
Record Resolution at a nanometer length scale
Exotic nanomaterials
Nanoparticles explaining risks to heart
Nanodiamond-enhanced MRI
Nano-notch
Single-molecule diode created
A novel form of iron for fortification of foods
WALK-IN-INTERVIEWs
Bonding Chips using Inkjet Printers
Nanoparticles helps Melanoma Treatment
Imaging at the Speed of Light
Reusable Sponge that Soaks up Oil
Color-Changing Glass
Molecular `Leaf`
Optical Metamaterial
Most Complex nanoparticles Designed
Low-Cost Diagnostic Systems
Ultralight Web of Silk Nano Fibers
shape-Shifting Molecular Robots
Magnetic `Persuasion` in Neighboring Metals
Anti-Fogging Water-Repellent Nanotextures
Portable Nanofiber
Resilient Flight Computers
Triboelectric nanogenerators
Nano `sandwich`
Computing with Biochemical Circuits made Easy
  Untitled Document
 
     
  Untitled Document
 
 
Untitled Document
  Follow us On  Follow us on FacebookFollow us on Twitter  
© 2010 Nano Digest. All Rights Reserved.   - Rify Hosting -