Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Improving lithium-ion batteries with nanoscale research

TEM image of a Silicon / Germanium nanowire.
TEM image of a Silicon / Germanium nanowire.

Abstract:
New research led by an electrical engineer at the University of California, San Diego is aimed at improving lithium-ion batteries through possible new electrode architectures with precise nano-scale designs. The researchers created nanowires that block diffusion of lithium (Li) across their silicon surface and promote layer-by-layer axial lithiation of the nanowire's germanium core.



Watch a video on YouTube that shows the axial lithiation of a silicon-coated nanowire's germanium core, as well as radial diffusion of lithium into an uncoated germanium nanowire. Video is from Dayeh's Integrated Electronics and Bio-interfaces Lab at UC San Diego and collaborators at Sandia National Laboratories.

Improving lithium-ion batteries with nanoscale research

San Diego, CA | Posted on September 30th, 2013

Shadi Dayeh, a professor in the Department of Electrical and Computer Engineering at the UC San Diego Jacobs School of Engineering, explained that this work could lead to "an effective way to tailor volume expansion of lithium ion battery electrodes which could potentially minimize their cracking, improve their durability, and perhaps influence how one could think about different electrode architectures."

The research was recently published in the journal Nano Letters in the paper "Tailoring Lithiation Behavior by Interface and Bandgap Engineering at the Nanoscale."

By coating germanium nanowires with silicon, the researchers stopped nearly all surface diffusion of lithium ions into the nanowires. Instead, lithium diffusion, known as lithiation, occurred layer by layer along the axis of the nanowire. This is in contrast to lithiation from the surface of nanowires not covered with silicon.

"These results demonstrate for the first time that interface and bandgap engineering of electrochemical reactions can be utilized to control the nanoscale ionic transport / insertion paths and thus may be a new tool to define the electrochemical reactions in Li-ion batteries," the researchers write in their Nano Letters paper.

Dayeh grew the nanowires during his time as a postdoctoral researcher at Los Alamos National Laboratory (LANL). Lithiation experiments were performed by two postdoctoral researchers from Sandia National Laboratories, Drs. Yang Liu and Xiaohua Liu, and Dayeh's postdocdoral researchers working at LANL. Dayeh formulated the mechanism and performed the analysis and simulations after joining the faculty of the Electrical and Computer Engineering Department at the UC San Diego Jacobs School of Engineering.

Funding sources for this research includes Nanostructures for Electrical Energy Storage (NEES), an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy, Los Alamos National Laboratory, Sandia National Laboratories, and UC San Diego.

####

For more information, please click here

Contacts:
Daniel Kane

858-534-3262

Copyright © University of California - San Diego

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Listen to an audio conversation with Shadi Dayeh on SoundCloud:

This work builds on research demonstrating excellent control over germanium / silicon (Ge/Si) heterostructuring, which Dayeh and colleagues recently published as a cover article in Applied Physics Letters:

and a cover letter in the journal Nano Letters:

Shadi Dayeh and the Integrated Electronics and Bio-interfaces Lab:

More Electrical and Computer Engineering News Via RSS:

Related News Press

News and information

CEA-Leti Reports Machine-Learning Breakthrough That Opens Way to Edge Learning: Article in Nature Electronics Details Method that Takes Advantage of RRAM Non-Idealities To Create Intelligent Systems that Have Potential Medical-Diagnostic Applications January 20th, 2021

Arrowhead Pharmaceuticals to Webcast Fiscal 2021 First Quarter Results January 20th, 2021

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Keeping the costs of superconducting magnets down using ultrasound: Scientists show ultrasonication is a cost-effective approach to enhance the properties of magnesium diboride superconductors January 15th, 2021

New way to control electrical charge in 2D materials: Put a flake on it January 15th, 2021

Laboratories

Controlling chemical catalysts with sculpted light January 15th, 2021

New class of cobalt-free cathodes could enhance energy density of next-gen lithium-ion batteries December 21st, 2020

NIST sensor experts invent supercool mini thermometer November 17th, 2020

Videos/Movies

Quantum wave in helium dimer filmed for the first time: Collaboration between Goethe University and the University of Oklahoma December 30th, 2020

Pitt researchers create nanoscale slalom course for electrons: Professors from the Department of Physics and Astronomy have created a serpentine path for electrons November 27th, 2020

Govt.-Legislation/Regulation/Funding/Policy

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Controlling chemical catalysts with sculpted light January 15th, 2021

Conductive nature in crystal structures revealed at magnification of 10 million times: University of Minnesota study opens up possibilities for new transparent materials that conduct electricity January 15th, 2021

Researchers realize efficient generation of high-dimensional quantum teleportation January 14th, 2021

Discoveries

CEA-Leti Reports Machine-Learning Breakthrough That Opens Way to Edge Learning: Article in Nature Electronics Details Method that Takes Advantage of RRAM Non-Idealities To Create Intelligent Systems that Have Potential Medical-Diagnostic Applications January 20th, 2021

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Scientists' discovery is paving the way for novel ultrafast quantum computers January 15th, 2021

Physicists propose a new theory to explain one dimensional quantum liquids formation January 15th, 2021

Announcements

CEA-Leti Reports Machine-Learning Breakthrough That Opens Way to Edge Learning: Article in Nature Electronics Details Method that Takes Advantage of RRAM Non-Idealities To Create Intelligent Systems that Have Potential Medical-Diagnostic Applications January 20th, 2021

Arrowhead Pharmaceuticals to Webcast Fiscal 2021 First Quarter Results January 20th, 2021

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Keeping the costs of superconducting magnets down using ultrasound: Scientists show ultrasonication is a cost-effective approach to enhance the properties of magnesium diboride superconductors January 15th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Conductive nature in crystal structures revealed at magnification of 10 million times: University of Minnesota study opens up possibilities for new transparent materials that conduct electricity January 15th, 2021

Quantum computers to study the functioning of the molecules of life: A team of theoretical physicists from the University of Trento has shown that it is possible to use quantum computers to simulate processes of great biological importance, such as changes in the shape of protein January 15th, 2021

Keeping the costs of superconducting magnets down using ultrasound: Scientists show ultrasonication is a cost-effective approach to enhance the properties of magnesium diboride superconductors January 15th, 2021

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Scientists synthetize new material for high-performance supercapacitors January 19th, 2021

Record-setting thermoelectric figure of merit achieved for metal oxides December 29th, 2020

New imaging method views soil carbon at near-atomic scales December 25th, 2020

New class of cobalt-free cathodes could enhance energy density of next-gen lithium-ion batteries December 21st, 2020

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project