Friday, October 21, 2011 1:49:17 PM
Shuttle fluoride increases storage capacity
Press Release 151/2011
[GOOGLE TRANSLATION]
KIT scientists are developing a new concept for rechargeable batteries
Structure of the fluoride-ion battery: a fluoride electrolyte separates the anode from the cathode metal and metal fluoride. (Photo: KIT)
A new concept for rechargeable batteries, researchers have developed the kit. Based on a fluoride-shuttle - the transfer of fluoride anions between the electrodes - it promises to be a multiple of the memory as it is possible for lithium-ion batteries. Even the reliability can be increased by reducing the need for lithium. In the "Journal of Materials Chemistry" are Dr. Maximilian Fichtner and Dr. Anji Reddy Munnangi the fluoride-ion battery before the first time.[ http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/c1jm13535j ]
Lithium-ion batteries are widely available - but their capacity is limited. In the future, be in demand with higher energy density, especially for mobile applications, battery systems, which can save more energy with less weight. KIT scientists conduct research, therefore, to alternative systems. A totally new concept for secondary batteries based on metal fluorides have developed Dr. Maximilian Fichtner, head of energy storage systems, and Dr. Anji Reddy Munnangi at the Institute of Nanotechnology (INT) of the KIT.
Metal fluorides can be used both as a conversion materials in lithium-ion batteries. They also allow lithium batteries with fluoride-free electrolyte, anode and cathode made of metal, metal fluoride, which have significantly higher storage capacity and enhanced security features. It takes the fluoride anion in place of lithium-cation the charge transfer. At anode and cathode, it is each to form a metal fluoride, or to its reduction. "There can be several electrons transferred per metal atom, this concept allows extremely high energy densities - up to ten times as high as with current lithium-ion batteries," explained Dr. Maximilian Fichtner.
The KIT researchers are now working to develop battery materials design and architecture to the initial capacity and to improve the cycle stability of the fluoride-ion battery. Another challenge is the development of electrolyte: The solid electrolyte used until now is only suitable for applications at elevated temperatures. The aim is therefore to find a suitable electrolyte for application liquid at room temperature.
M. Anji Reddy and M. Fichtner: Batteries based on fluoride shuttle. Journal of Materials Chemistry. 2011, Advance Article. DOI: 10.1039/C1JM13535J.
The Karlsruhe Institute of Technology (KIT) is a public corporation under the laws of the State of Baden-Wuerttemberg. It fulfills the mission of a university and the mission of a national research center of the Helmholtz Association. The KIT focuses on the knowledge triangle of research - teaching - innovation.
or, 19.10.2011
http://www.kit.edu/besuchen/pi_2011_8281.php
http://www.nanowerk.com/news/newsid=23143.php
Press Release 151/2011
[GOOGLE TRANSLATION]
KIT scientists are developing a new concept for rechargeable batteries
Structure of the fluoride-ion battery: a fluoride electrolyte separates the anode from the cathode metal and metal fluoride. (Photo: KIT)
A new concept for rechargeable batteries, researchers have developed the kit. Based on a fluoride-shuttle - the transfer of fluoride anions between the electrodes - it promises to be a multiple of the memory as it is possible for lithium-ion batteries. Even the reliability can be increased by reducing the need for lithium. In the "Journal of Materials Chemistry" are Dr. Maximilian Fichtner and Dr. Anji Reddy Munnangi the fluoride-ion battery before the first time.[ http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/c1jm13535j ]
Lithium-ion batteries are widely available - but their capacity is limited. In the future, be in demand with higher energy density, especially for mobile applications, battery systems, which can save more energy with less weight. KIT scientists conduct research, therefore, to alternative systems. A totally new concept for secondary batteries based on metal fluorides have developed Dr. Maximilian Fichtner, head of energy storage systems, and Dr. Anji Reddy Munnangi at the Institute of Nanotechnology (INT) of the KIT.
Metal fluorides can be used both as a conversion materials in lithium-ion batteries. They also allow lithium batteries with fluoride-free electrolyte, anode and cathode made of metal, metal fluoride, which have significantly higher storage capacity and enhanced security features. It takes the fluoride anion in place of lithium-cation the charge transfer. At anode and cathode, it is each to form a metal fluoride, or to its reduction. "There can be several electrons transferred per metal atom, this concept allows extremely high energy densities - up to ten times as high as with current lithium-ion batteries," explained Dr. Maximilian Fichtner.
The KIT researchers are now working to develop battery materials design and architecture to the initial capacity and to improve the cycle stability of the fluoride-ion battery. Another challenge is the development of electrolyte: The solid electrolyte used until now is only suitable for applications at elevated temperatures. The aim is therefore to find a suitable electrolyte for application liquid at room temperature.
M. Anji Reddy and M. Fichtner: Batteries based on fluoride shuttle. Journal of Materials Chemistry. 2011, Advance Article. DOI: 10.1039/C1JM13535J.
The Karlsruhe Institute of Technology (KIT) is a public corporation under the laws of the State of Baden-Wuerttemberg. It fulfills the mission of a university and the mission of a national research center of the Helmholtz Association. The KIT focuses on the knowledge triangle of research - teaching - innovation.
or, 19.10.2011
http://www.kit.edu/besuchen/pi_2011_8281.php
http://www.nanowerk.com/news/newsid=23143.php
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