Featured Research

from universities, journals, and other organizations

Materials scientists make additive-free battery electrodes with nanoparticles

Date:
October 30, 2012
Source:
Cornell University
Summary:
Materials scientists have developed a simple, robust way to fabricate carbon-free and polymer-free, lightweight colloidal films for lithium-ion battery electrodes, which could greatly improve battery performance.

Nanoparticle battery electrodes deposited through electrophoretic deposition could lead to lighter and more efficient batteries. At top is a schematic of the EPD process. The middle is an electron microscope image of the nanoparticle electrode.
Credit: Richard Robinson

Materials scientists have developed a simple, robust way to fabricate carbon-free and polymer-free, lightweight colloidal films for lithium-ion battery electrodes, which could greatly improve battery performance.

By developing a method for additive-free electrodes that maintain high conductivity, the researchers have opened new possibilities for reducing the weight and volume of batteries, while also creating a template system for studying the physics of nanoparticle electrodes.

The work, led by Richard Robinson, assistant professor of materials science and engineering, and graduate student Don-Hyung Ha, is featured in the Oct. 10 issue of Nano Letters (Vol. 12, No. 10).

Nanoparticles have been extensively investigated as an active cathode and anode in lithium-ion batteries -- common components of electronic devices -- because they can enhance the batteries' electrochemical properties.

To use colloidal nanoparticles for the electrodes, it had been necessary to combine them with carbon-based conductive materials for enhancing charge transport, as well as polymeric binders to stick the particles together and to the electrode substrate, Robinson said. This process added extra weight to the battery and made it difficult to model the movement of Li-ions and electrons through the mixture.

The critical processing technique Robinson and colleagues used was electrophoretic deposition, which binds the metal nanoparticles to the surface of the electrode substrate to each other in an assembly, creating strong electrical contacts between the particles and current collector.

The process results in a significant improvement in battery electrode assembly that cannot be replicated by conventional methods. Once attached, the particles are no longer soluble and are mechanically robust. In fact, this processing creates a film that has superior mechanical stability when compared to films fabricated by conventional battery-making methods with binders, Robinson said.

This research has led to the first cobalt-oxide nanoparticle-film battery electrode made without using binders and carbon black additives, and they show high gravimetric and volumetric capacities, even after 50 cycles.

The work was supported by the Energy Materials Center at Cornell funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Science; the Cornell Center for Materials Research with funding from the National Science Foundation; and by the King Abdullah University of Science and Technology center at Cornell.


Story Source:

The above story is based on materials provided by Cornell University. The original article was written by Anne Ju. Note: Materials may be edited for content and length.


Journal Reference:

  1. Don-Hyung Ha, Mohammad A. Islam, Richard D. Robinson. Binder-Free and Carbon-Free Nanoparticle Batteries: A Method for Nanoparticle Electrodes without Polymeric Binders or Carbon Black. Nano Letters, 2012; 12 (10): 5122 DOI: 10.1021/nl3019559

Cite This Page:

Cornell University. "Materials scientists make additive-free battery electrodes with nanoparticles." ScienceDaily. ScienceDaily, 30 October 2012. <www.sciencedaily.com/releases/2012/10/121030173123.htm>.
Cornell University. (2012, October 30). Materials scientists make additive-free battery electrodes with nanoparticles. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2012/10/121030173123.htm
Cornell University. "Materials scientists make additive-free battery electrodes with nanoparticles." ScienceDaily. www.sciencedaily.com/releases/2012/10/121030173123.htm (accessed April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Air Force: $4.2B Saved from Grounding A-10s

Air Force: $4.2B Saved from Grounding A-10s

AP (Apr. 23, 2014) Speaking about the future of the United States Air Force, Chief of Staff Gen. Mark Welsh says the choice to divest the A-10 fleet was logical and least impactful. (April 23) Video provided by AP
Powered by NewsLook.com
Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com
China Falls for 4x4s at Beijing Auto Show

China Falls for 4x4s at Beijing Auto Show

AFP (Apr. 22, 2014) The urban 4x4 is the latest must-have for Chinese drivers, whose conversion to the cult of the SUV is the talking point of this year's Beijing auto show. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Hagel Gets Preview of New High-Tech Projects

Hagel Gets Preview of New High-Tech Projects

AP (Apr. 22, 2014) Defense Secretary Chuck Hagel is given hands-on demonstrations Tuesday of some of the newest research from DARPA _ the military's Defense Advanced Research Projects Agency program. (April 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins