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Flipping the electron spin

Jülich / Munich, 6 December 2017 - When lithium-ion batteries are charged too quickly, metallic lithium gets deposited on the anodes. This reduces battery capacity and lifespan and can even destroy the batteries. Scientists at the Forschungszentrum Jülich and the Technical University of Munich (TUM) have now presented a process that, for the first time ever, allows this so-called lithium plating process to be investigated directly. This puts new strategies for quick-charging strategies close at hand. More: Flipping the electron spin …


CO2 – From Climate Killer to Chemical Raw Material

Jülich, 25 April 2017 – You take the harmful greenhouse gas carbon dioxide and convert it by means of renewable electricity into a universal basis for the production of fuels as well as for the chemical industry: this in a nutshell is the aim of a group of procedures also referred to as co-electrolysis. In the journal Angewandte Chemie, Jülich scientists report about the current status of development of this power-to-X concept, which is one of the key topics of research for the P2X Kopernikus project. More: CO2 – From Climate Killer to Chemical Raw Material …

Silicon battery

Finally Up and Running

Jülich, 21 July 2016 – Silicon-air batteries are viewed as a promising and cost-effective alternative to current energy storage technology. However, they have thus far only achieved relatively short running times. Jülich researchers have now discovered why. More: Finally Up and Running …


Kopernikus Supports Transformation of Energy Sector

The „Energiewende“ provides the expansion of renewable energies. To use the opportunities associated with this transformation and minimize their risks, it requires the development of economic concepts for usage and storage of electricity from fluctuating renewable energy sources. These concepts are summarized under the term „Power-to-X“. They show a special potential to reduce the use of fossil fuels in the essential sectors of the German industrial location, namely power and energy, transportation and traffic and chemicals.
The Kopernikus project “Power-to-X” faces this challenge by creating points of interconnection between energy supply and material value creation. More: Kopernikus Supports Transformation of Energy Sector …

Sommerschule Athen 2015

Joint European Summer School on Fuel Cell, Electrolyser, and Battery Technologies
JESS 2017

More: Joint European Summer School on Fuel Cell, Electrolyser, and Battery Technologies JESS 2017 …


Batteries Come up for Air

Jülich, 9 May 2016 – At the moment, lithium-ion batteries are state of the art in energy storage. However, competitors are already waiting in the wings, including lithium-air technology. A team from Forschungszentrum Jülich and Technische Universität München recently found an explanation for the fact that these promising batteries so far only survive a few charge cycles. They demonstrated that the operation of lithium-air batteries leads to the formation of a particularly reactive form of oxygen. As reported in the current edition of the journal Angewandte Chemie, this singlet oxygen is probably responsible for the electrolyte rapidly decomposing and the carbon electrode corroding. This discovery will make it possible to selectively improve lithium-air batteries. More: Batteries Come up for Air …


HiTEC Graduate School

HITEC is a Helmholtz Graduate School of Forschungszentrum Jülich and the five partner universities Aachen, Bochum, Cologne, Düsseldorf and Wuppertal focusing on energy and climate research. More: HiTEC Graduate School …


Nuclear Magnetic Resonance with Low Magnetic Fields

A tiny component which amplifies measurement signals and suppresses noise is presented by Jülich and Aachen researchers in the current issue of Nature Physics. They developed it for nuclear magnetic resonance measurements in battery research. The method is typically used for imaging techniques in medicine (MRI) or the analysis of molecular structures in biology and chemistry (NMR). The receiver permits high sensitivity at low frequencies – without the extremely strong and expensive magnets which are usually required for precise measurements. More: Nuclear Magnetic Resonance with Low Magnetic Fields …

Elektronenspinresonanz-Signal von metallischem Lithium als Funktion der Zeit während der Zyklierung einer Batteriezelle

Operando electron paramagnetic resonance spectroscopy – formation of mossy lithium on lithium anodes during charge–discharge cycling

The formation of mossy lithium and lithium dendrites so far prevents the use of lithium metal anodes in lithium ion batteries. To develop solutions for this problem (e.g., electrolyte additives), operando measurement techniques are required to monitor mossy lithium and dendrite formation during electrochemical cycling. Here we present a novel battery cell design that enables operando electron paramagnetic resonance (EPR) spectroscopy. It is shown that time-resolved operando EPR spectroscopy during electrochemical cycling of a lithium-metal/LiFePO4 (LFP) cell provides unique insights into the lithium plating/dissolution mechanisms, which are consistent with ex situ scanning electron microscopy (SEM) analysis. To demonstrate the viability of the operando EPR method, two cells using different electrolytes were studied. When using an electrolyte containing fluoroethylene carbonate (FEC) additive, a higher reversibility of the lithium anode and reduced formation of micro-structured (mossy/dendritic) lithium were observed. More: Operando electron paramagnetic resonance spectroscopy – formation of mossy lithium on lithium anodes during charge–discharge cycling …