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UT engineers helping ORNL with key sustainable energy riddle

Posted at 10:40 pm January 27, 2015
By University of Tennessee Leave a Comment

Alexander Papandrew and Gerd Duscher

Gerd Duscher, left, of the Department of Materials Science and Engineering, and Alexander Papandrew, of the Department of Chemical and Biomolecular Engineering. (Photo courtesy University of Tennessee)

KNOXVILLE—One of the key holdups in the march toward more efficient sustainable energy could soon be answered, thanks in part to researchers at the University of Tennessee in Knoxville.

The College of Engineering’s Alexander Papandrew and Gerd Duscher are part of a broader Oak Ridge National Laboratory-led team that recently received a $2.75 million U.S. Department of Energy grant for work on improving fuel cells, $1.4 million of which went to their project.

The basic premise of their work is to find a far more efficient way to turn chemical energy—in this case natural gas—into electrical energy. [Read more…]

Filed Under: College, Education, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: Advanced Research Projects Agency-Energy, Alexander Papandrew, ARPA-E, catalysts, chemical energy, College of Engineering, Department of Chemical and Biomolecular Engineering, Department of Materials Science and Engineering, DOE, electrical energy, electrodes, electrolyte, fuel cells, Gerd Duscher, natural gas, Oak Ridge National Laboratory, ORNL, platinum, sustainable energy, U.S. Department of Energy, University of Tennessee, UT

‘Double-duty’ electrolyte enables new chemistry for longer-lived batteries

Posted at 8:53 pm May 12, 2014
By Oak Ridge National Laboratory Leave a Comment

ORNL Battery Chemistry

When ORNL researchers incorporated a solid lithium thiophosphate electrolyte into a lithium-carbon fluoride battery, the device generated a 26 percent higher capacity than what would be its theoretical maximum if each component acted independently. (Image courtesy ORNL)

 

Researchers at Oak Ridge National Laboratory have developed a new and unconventional battery chemistry aimed at producing batteries that last longer than previously thought possible.

In a study published in the Journal of the American Chemical Society, ORNL researchers challenged a long-held assumption that a battery’s three main components—the positive cathode, negative anode, and ion-conducting electrolyte—can play only one role in the device.

The electrolyte in the team’s new battery design has dual functions: It serves not only as an ion conductor but also as a cathode supplement. This cooperative chemistry, enabled by the use of an ORNL-developed solid electrolyte, delivers an extra boost to the battery’s capacity, and extends the lifespan of the device.

“This bi-functional electrolyte revolutionizes the concept of conventional batteries and opens a new avenue for the design of batteries with unprecedented energy density,” said ORNL’s Chengdu Liang. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Science, U.S. Department of Energy Tagged With: anode, batteries, battery chemistry, cathode, Center for Nanophase Materials Sciences, Chengdu Liang, CNMS, conductor, Division of Materials Sciences and Engineering, DOE, electrolyte, Ezhiylmurugan Rangasamy, Gayatri Sahu, Journal of the American Chemical Society, Juchuan Li, lithium carbon fluoride battery, lithium thiophosphate electrolyte, Nancy Dudney, Nanoscale Science Research Centers, NSRC, Oak Ridge National Laboratory, Office of Science, ORNL, Pushing the Theoretical Limit of Li-CFx Batteries: A Tale of Bi-functional Electrolyte, U.S. Department of Energy

New all-solid sulfur-based battery outperforms lithium-ion technology

Posted at 7:00 am June 6, 2013
By Oak Ridge National Laboratory 4 Comments

ORNL Lithium-Sulfur Battery

A new all-solid lithium-sulfur battery developed by an Oak Ridge National Laboratory team led by Chengdu Liang has the potential to reduce cost, increase performance, and improve safety compared with existing designs. (Submitted photo)

Scientists at Oak Ridge National Laboratory have designed and tested an all-solid lithium-sulfur battery with approximately four times the energy density of conventional lithium-ion technologies that power today’s electronics.

The ORNL battery design, which uses abundant low-cost elemental sulfur, also addresses flammability concerns experienced by other chemistries.

“Our approach is a complete change from the current battery concept of two electrodes joined by a liquid electrolyte, which has been used over the last 150 to 200 years,” said Chengdu Liang, lead author on the ORNL study published this week in Angewandte Chemie International Edition. [Read more…]

Filed Under: Oak Ridge National Laboratory, Science, Top Stories Tagged With: all-solid battery, Angewandte Chemie International Edition, battery, Center for Nanophase Materials Sciences, Chengdu Liang, CNMS, DOE, electrolyte, ions, lithium anode, lithium metal oxides, Lithium Polysulfidophosphates: A Family of Lithium-Conducting Sulfur-Rich Compounds for Lithium-Sulfur Batteries, lithium-ion, lithium-ion technologies, lithium-sulfur battery, mAh, milliamp-hours per gram, Nancy Dudney, Nanoscale Science Research Centers, Oak Ridge National Laboratory, Office of Energy Efficiency and Renewable Energy, Office of Science, ORNL, sulfur, sulfur-rich cathode, U.S. Department of Energy, Vehicle Technologies Office, Wujun Fu, Zengcai Liu, Zhan Lin

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Classifieds

Public Notice: NNSA announces no significant impact of Y-12 Development Organization operations at Horizon Center

AVAILABILITY OF THE FINAL ENVIRONMENTAL ASSESSMENT FOR THE OFFSITE HOUSING OF THE Y-12 DEVELOPMENT … [Read More...]

ADFAC seeks contractors for five homes

Aid to Distressed Families of Appalachian Counties (ADFAC) is a non-profit community based agency, … [Read More...]

Public notice: Draft environmental assessment for Y-12 Development Organization at Horizon Center

AVAILABILITY OF THE DRAFT ENVIRONMENTAL ASSESSMENT FOR THE OFFSITE HOUSING OF THE Y-12 DEVELOPMENT … [Read More...]

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