Gebrekidan Gebresilassie Eshetu

• Ph.D in Materials for Energy Storage and Conversion
• Researcher at RWTH Aachen University

Owing to resource abundance, and hence, a reduction in cost, wider global distribution, environmental benignity, and sustainability, sodium‐based, rechargeable batteries are believed to be the most feasible and enthralling energy‐storage devices. Accordingly, they have recently attracted attention from both the scientific and industrial communities...

With a remarkably higher theoretical energy density compared to lithium-ion batteries (LIBs) and abundance of elemental sulfur, lithium sulfur (Li-S) batteries have emerged as one of the most promising alternatives among all the post LIB technologies. In particular, the coupling of solid polymer electrolytes (SPEs) with the cell chemistry of Li-S b...

Lithium metal (Li°) - based rechargeable batteries (LMBs), such as Li° anode vs. intercalation and/or conversion type cathode batteries, lithium-sulphur (Li-S), and lithium-oxygen (O2)/air (Li-O2/air) are becoming increasingly important for electrifying the modern transportation system, enabling sustainable mobility in the near future. Though some...

Lithium metal (Li°) - based rechargeable batteries (LMBs), such as Li° anode vs. intercalation and/or conversion type cathode batteries, lithium-sulphur (Li-S), and lithium-oxygen (O2)/air (Li-O2/air) are becoming increasingly important for electrifying the modern transportation system, enabling sustainable mobility in the near future. Though some...

Depuis 2010, l’Ineris consolide l’évaluation des profils de danger présenté par les liquides ioniques (LIs) [1 ; 2 ] dont l’utilisation est étudiée pour diverses applications, en particulier le stockage d’énergie [3]. Pour les batteries lithium et sodium-ion, un intérêt de plus en plus marqué pour les LIs de type pyrrolidinium [PYR1,y]+[anion fluor...

Of the various beyond lithium-ion battery technologies, lithium-sulphur (Li-S) batteries have an appealing theoretical energy density and are being intensely investigated as next generation rechargeable lithium metal batteries. However, the stability of the Li° anode is among the most urgent challenges that need to be addressed to ensure the long-t...

All-solid-state lithium-sulfur batteries (ASSLSBs) offer a means to enhance the energy density and safety of the state-of-art lithiumion batteries (LIBs), due to their high gravimetric energy density, low cost and environmental benignancy. In this work, the status of the research advances and perspectives on several types of solid electrolytes (SEs...

Of the various beyond lithium-ion battery technologies, lithium-sulphur (Li-S) batteries have an appealing theoretical energy density and are being intensely investigated as next generation rechargeable lithium metal batteries. However, the stability of the Li° anode is among the most urgent challenges that need to be addressed to ensure the long-t...

Polymer-rich composite electrolytes with lithium bis(fluorosulfonyl)imide/poly(ethylene oxide) (LiFSI/PEO) containing either Li-ion conducting glass ceramic (LICGC) or inorganic Al2O3 fillers are investigated in all solid-state Li-S cells. In the presence of the fillers, the ionic conductivity of the composite polymer electrolytes (CPEs) does not i...

The use of ionic liquids (ILs) as advanced electrolytes components in electrochemical energy storage devices is one of the most appealing and emerging options. However, though ILs are hailed as safer and eco-friendly electrolytes, overcoming the limitations imposed by the highly volatile/combustible carbonate based electrolytes, the full scale and...

A comparative and in-depth investigation on the reactivity of various Li-based electrolytes and of the solid electrolyte interface (SEI) formed at graphite electrode is carried out using X-ray photoelectron spectroscopy (XPS), chemical simulation test, and differential scanning calorimetry (DSC). The electrolytes investigated include LiX (X = PF6,...

A comparative and in-depth investigation on the reactivity of various Li-based electrolytes and of the solid electrolyte interface (SEI) formed at graphite electrode is carried out using X-ray photoelectron spectroscopy (XPS), chemical simulation test, and differential scanning calorimetry (DSC). The electrolytes investigated include LiX (X = PF6,...

We report a systematic investigation of Na-based electrolytes that comprise various NaX [X=hexafluorophosphate (PF6 ), perchlorate (ClO4 ), bis(trifluoromethanesulfonyl)imide (TFSI), fluorosulfonyl-(trifluoromethanesulfonyl)imide (FTFSI), and bis(fluorosulfonyl)imide (FSI)] salts and solvent mixtures [ethylene carbonate (EC)/dimethyl carbonate (DMC...

Though in its infancy stage, ionic liquid (IL)-assisted synthesis and processing of energy conversion materials is triggering a wide interest to eco-friendly production of already existing and novel materials. ILs possess the potential of overcoming the limitations of conventional synthesis approaches. Due to their unique characteristics such as hi...

Lithium-ion batteries are becoming increasingly important for electrifying the modern transportation system and, thus, hold the promise to enable sustainable mobility in the future. However, their large-scale application is hindered by severe safety concerns when the cells are exposed to mechanical, thermal, or electrical abuse conditions. These sa...

Parmi les systèmes de stockage électrochimiques existants, la technologie lithium-ion (Li-ion) s’impose comme l’une des principales solutions de stockage pour la décennie à venir en raison de sa densité d’énergie bien supérieure aux autres technologies de batteries rechargeables (Ni- Cd, Ni-MH, acide-plomb). La technologie Li-ion est en pleine croi...

Das Aufkommen von ionischen Flüssigkeiten (ionic liquids, ILs) als umweltfreundliche und vielversprechende Reaktionsmedien eröffnete neue Möglichkeiten im Bereich der elektrochemischen Energiespeicherung. Über ihre Verwendung als Elektrolytbestandteile in Batterien und Superkondensatoren hinaus zeigen ILs eine einmalige Vielfalt an Eigenschaften, s...

The advent of ionic liquids (ILs) as eco-friendly and promising reaction media has opened new frontiers in the field of electrochemical energy storage. Beyond their use as electrolyte components in batteries and supercapacitors, ILs have unique properties that make them suitable as functional advanced materials, media for materials production, and...

le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, France h i g h l i g h t s Comparative fire behavior of LiPF 6 or LiFSI containing electrolytes was studied. Salt discriminating effect impacting overall related electrolyte pool burning mode. Effective heat of pool combustion were determined and ranged between 11 and 16 kJ g À1 . Fire...

As electric vehicles may have a positive impact on global warming, worldwide endeavour is devoted to improving the performance, durability and safety of Li-ion batteries considered as the most promising technology. To help the characterisation and identification of volatile compounds released upon batteries ageing or during a system malfunction-ind...

To better rule out the complex fire risk related to large format lithium ion cells, a detailed and systematic evaluation, both at component and cell levels, could be an invaluable milestone. Therefore, combustion analysis was conducted for major single organic solvents and their mixtures used in lithium ion battery technology, both in oxygen rich a...