Silicon-carbon nanocomposite seeks to boost lithium-ion performance
March 16, 2010 // Paul Buckley
A high-performance anode structure based on silicon-carbon nanocomposite materials developed by the Georgia Institute of Technology is aiming to improve the performance of lithium-ion batteries used in a wide range of applications from hybrid vehicles to portable electronics.
Employing a "bottom-up" self-assembly technique, the anode’s structure takes advantage of nanotechnology to fine-tune its materials properties, addressing the shortcomings of earlier silicon-based battery anodes. The low-cost fabrication technique was designed to be easily scaled up and compatible with existing battery manufacturing.
"Development of a novel approach to producing hierarchical anode or cathode particles with controlled properties opens the door to many new directions for lithium-ion battery technology," said Gleb Yushin, an assistant professor in the School of Materials Science and Engineering at the Georgia Institute of Technology. "This is a significant step toward commercial production of silicon-based anode materials for lithium-ion batteries."
Existing lithium-ion batteries rely on anodes made from graphite, a form of carbon. Silicon-based anodes theoretically offer as much as a ten-fold capacity improvement over graphite but have so far not been stable enough for practical use.
Graphite anodes use particles ranging in size from 15 to 20 microns. If silicon particles of that size are simply substituted for the graphite, expansion and contraction as the lithium ions enter and leave the silicon creates cracks that quickly cause the anode to fail.
The new nanocomposite material solves that degradation problem, potentially allowing battery designers to tap the capacity advantages of silicon and enabling a higher power output from a given battery size – or allow a smaller battery to produce a required amount of power.
Electrical measurements of the new composite anodes in small coin cells have shown a capacity more than five times greater than the theoretical capacity of graphite.
Details of the new self-assembly approach were published online in the journal Nature Materials on March 14.
Related link: www. gatech.edu
Indian fab project hires former GloFo exec
August 01, 2015
Indian foundry fab will be located near Indore in Madhya Pradesh. The company reports that talks are moving the project forward ...
OmniVision shareholders approve Seagull takeover
Ancient RF teardown: crude but effective
Omnifocal eye-glasses need two-year's development
Is 3D XPoint based on phase-change memory?
Google Glass refocuses on enterprises, circumvents privacy issues
July 31, 2015
According to the Wall Street Journal, Google Glass has been relooked to and redesigned with a bigger display and a faster ...
IoT wireless sensors and the problem of short battery life
High speed DAC for wide bandwidth signal generation
IBM's Watson to help CVS manage patient health data
- Dual Phase Buck Controller Drives High Density 1.2V/60A Supply with Submilliohm DCR Sensing
- Test environment for the positioning elements of wearable devices
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
- Top 5 Challenges for testing Today's Consumer Electronics
InterviewGlobalfoundries' CEO on why FD-SOI and why now
With its latest news Globalfoundries Inc. has not only confirmed itself as a supporter of the fully-depleted silicon-on-insulator (FD-SOI) approach to IC manufacturing but that it also thinks sufficiently ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.