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
Oscilloscope engine plugs into portable Apple products
September 30, 2014
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with ...
BMW joins forces with Baidu for automated driving
Self-tuning acoustic-ready chip increases audio focus
16nm FinFETs boost ARM's 64-bit big.LITTLE
X-ray imaging reveals path to extending battery lifetimes
Electron innovation prolongs power in mobile devices
September 30, 2014
Researchers from The University of Texas at Dallas have created technology that could be the first step toward wearable computers ...
What Is Digital Power System Management?
Qualcomm increases share of smartphone processor market
Aggregating disparate data protocols from IoT
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
- A Novel Approach to Industrial Rectifier Systems
- Putting FPGAs to Work in Software Radio Systems Handbook
InterviewCEO interview: AMS' Laney on driving a sensor-driven business
Kirk Laney, CEO of Austrian mixed-signal chip and sensor company AMS, wants to leverage the opportunity that technology affords to create new markets for sensors and sensor interfaces.
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, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...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.