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The DOE Science News Source is a Newswise initiative to promote research news from the Office of Science of the DOE to the public and news media.
  • 2014-08-27 14:00:00
  • Article ID: 622561

Rubber Meets the Road with New ORNL Carbon, Battery Technologies

  • Credit: ORNL

OAK RIDGE, Tenn., Aug. 27, 2014 – Recycled tires could see new life in lithium-ion batteries that provide power to plug-in electric vehicles and store energy produced by wind and solar, say researchers at the Department of Energy’s Oak Ridge National Laboratory.

By modifying the microstructural characteristics of carbon black, a substance recovered from discarded tires, a team led by Parans Paranthaman and Amit Naskar is developing a better anode for lithium-ion batteries. An anode is a negatively charged electrode used as a host for storing lithium during charging.

The method, outlined in a paper published in the journal RSC Advances, has numerous advantages over conventional approaches to making anodes for lithium-ion batteries.

“Using waste tires for products such as energy storage is very attractive not only from the carbon materials recovery perspective but also for controlling environmental hazards caused by waste tire stock piles,” Paranthaman said.

The ORNL technique uses a proprietary pretreatment to recover pyrolytic carbon black material, which is similar to graphite but man-made. When used in anodes of lithium-ion batteries, researchers produced a small, laboratory-scale battery with a reversible capacity that is higher than what is possible with commercial graphite materials.

In fact, after 100 cycles the capacity measures nearly 390 milliamp hours per gram of carbon anode, which exceeds the best properties of commercial graphite. Researchers attribute this to the unique microstructure of the tire-derived carbon.

“This kind of performance is highly encouraging, especially in light of the fact that the global battery market for vehicles and military applications is approaching $78 billion and the materials market is expected to hit $11 billion in 2018,” Paranthaman said.

Anodes are one of the leading battery components, with 11 to 15 percent of the materials market share, according to Naskar, who noted that the new method could eliminate a number of hurdles.

“This technology addresses the need to develop an inexpensive, environmentally benign carbon composite anode material with high-surface area, higher-rate capability and long-term stability,” Naskar said.

ORNL plans to work with U.S. industry to license this technology and produce lithium-ion cells for automobile, stationary storage, medical and military applications. ORNL has posted the solicitation titled, “Low-Cost, Graphite Anodes For Lithium-Ion Batteries,” in FedBizOpps (www.fbo.gov). The solicitation (#ORNL-TT-2014-08) closes Sept. 15. Other potential uses include water filtration, gas sorption and storage.

Paranthaman and Naskar, authors of a paper titled “Tailored Recovery of Carbons from Waste Tires for Enhanced Performance as Anodes in Lithium-Ion Batteries,” envision batteries featuring this technology being highly marketable. The paper is available at http://pubs.rsc.org/en/content/articlelanding/2014/ra/c4ra03888f#!divAbstract

Co-authors are Zhonghe Bi, Yunchao Li, Sam Akato, Dipendu Saha, Miaofang Chi and Craig Bridges. They are working with David Wood and Jianlin Li on a pilot manufacturing process to scale up the recovery of material and demonstrate applications as anodes for lithium-ion batteries in large-format pouch cells. Researchers expect these batteries to be less expensive than those manufactured with commercial carbon powders.

The research on conversion of recycled tires to graphite powders was funded by the laboratory’s Technology Innovation Program while the research on battery fabrication and electrochemical testing was sponsored by DOE’s Office of Basic Energy Sciences, Materials Sciences and Engineering Division. Transmission electron microscopy research was supported by ORNL’s Center for Nanophase Materials Sciences, a DOE Office of Science user facility.

UT-Battelle manages ORNL for the Department of Energy’s Office of Science. DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of the time. For more information, please visit science.energy.gov.

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Image: http://www.ornl.gov/Image%20Library/Main%20Nav/ORNL/News/News%20Releases/2014/Recycled-Tire-Battery-Schematics_hr.jpg?code=925ce247-3526-45e6-93cb-a3194c04194f

Cutline: ORNL researchers’ goal is to scale up the recovery process and demonstrate applications as anodes for lithium-ion batteries in large-format pouch cells.

NOTE TO EDITORS: You may read other press releases from Oak Ridge National Laboratory or learn more about the lab at http://www.ornl.gov/news. Additional information about ORNL is available at the sites below:

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