Explanipedia

High‐Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquids Open

Christian Rodenbücher, Carsten Korte, Yingzhen Chen, Klaus Wippermann, Piotr M. Kowalski , et al. · 2024

A hydrogen‐based energy system will be the backbone of a future energy grid using renewable energies. It is widely accepted that polymer electrolyte membrane fuel cells (PEMFCs) are promising converters of chemical energy stored as hydroge…

Phosphonium-Based Polyelectrolytes: Preparation, Properties, and Usage in Lithium-Ion Batteries Open

Muhammad Syukri Mohamad Misenan, Rolf Hempelmann, Markus Gallei, Tarık Eren · 2023

Phosphorous is an essential element for the life of organisms, and phosphorus-based compounds have many uses in industry, such as flame retardancy reagents, ingredients in fertilizers, pyrotechnics, etc. Ionic liquids are salts with meltin…

Dynamics, cation conformation and rotamers in guanidinium ionic liquids with ether groups Open

Daniel Rauber, Frederik Philippi, Bernd Morgenstern, Josef Zapp, Björn Kuttich , et al. · 2023

Electrostatic boosting of ionic dye pollutant removal from aquatic environment using a single electrode photoreactor Open

Mohsen Lashgari, Sepideh Naseri-Moghanlou, Tohid Khanahmadlou, Rolf Hempelmann · 2023

A green advanced oxidation (AO) strategy to destroy dye pollutants and remove them from aquatic environments is to utilize sunlight and employ thin-film semiconducting photo-reactors. In this light-driving AO method, besides the type of dy…

CCDC 2157463: Experimental Crystal Structure Determination Open

Daniel Rauber, Frederik Philippi, Julian Becker, Josef Zapp, Bernd Morgenstern , et al. · 2023

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

CCDC 2157466: Experimental Crystal Structure Determination Open

Daniel Rauber, Frederik Philippi, Julian Becker, Josef Zapp, Bernd Morgenstern , et al. · 2023

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

A 2023 update on the performance of ionic-liquid proton-exchange-membrane fuel cells Open

Allan L. L. East, Manh Cuong Nguyen, Rolf Hempelmann · 2023

A mini-review is provided of the literature concerning the performance of proton-exchange-membrane fuel cells (PEMFCs) containing (immobilized) ionic liquids as possible electrolytes, focusing on papers reporting performance metrics (power…

Dynamics, Cation Conformation and Rotamers in Guandinium Ionic Liquids with Ether Groups Open

Daniel Rauber, Frederik Philippi, Bernd Morgenstern, Josef Zapp, Björn Kuttich , et al. · 2023

Anion and ether group influence in protic guanidinium ionic liquids Open

Daniel Rauber, Frederik Philippi, Julian Becker, Josef Zapp, Bernd Morgenstern , et al. · 2023

Dynamics and structures of protic ionic liquids from the superbase guanidinium are analyzed in detail. The H-bond strength correlates with the proton affinity of the constituting acid and can be monitored by the 1 H or 15 N chemical shifts.

P-containing coated carbons from phosphonium ionic liquids as catalyst supports for fuel cell applications Open

Angelo A. Severin, Daniel Rauber, Stavroula Pachoula, Frederik Philippi, Ivan Radev , et al. · 2022

Phosphorus-containing catalyst supports synthesized by coating and pyrolysis of phosphonium ionic liquids lead to improved fuel cell properties.

Pairing nitroxyl radical and phenazine with electron-withdrawing/-donating substituents in “water-in-ionic liquid” for high-voltage aqueous redox flow batteries Open

Zhifeng Huang, Rolf Hempelmann, Yiqiong Zhang, Tao Li, Ruiyong Chen · 2022

Aqueous redox-active organic materials-base electrolytes are sustainable alternatives to vanadium-based electrolyte for redox flow batteries (RFBs) due to the advantages of high ionic conductivity, environmentally benign, safety and low co…

Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications Open

Andreas Hofmann, Daniel Rauber, Tzu-Ming Wang, Rolf Hempelmann, Christopher W. M. Kay , et al. · 2022

In this study, we address the fundamental question of the physicochemical and electrochemical properties of phosphonium-based ionic liquids containing the counter-ions bis(trifluoromethanesulfonyl)imide ([TFSI]−) and bis(fluorosulfonyl)imi…

High‐Temperature Quantum Tunneling and Hydrogen Bonding Rearrangements Characterize the Solid‐Solid Phase Transitions in a Phosphonium‐Based Protic Ionic Liquid Open

Alexander E. Khudozhitkov, Masaki Donoshita, Alexander G. Stepanov, Frederik Philippi, Daniel Rauber , et al. · 2022

We report the complex phase behavior of the glass forming protic ionic liquid (PIL) d3‐octylphosphonium bis(trifluoromethylsulfonyl)imide [C 8 H 17 PD 3 ][NTf 2 ] by means of solid‐state NMR spectroscopy. Combined line shape and spin relax…

CCDC 2081035: Experimental Crystal Structure Determination Open

Thomas Büttner, Konstantin Weißhaar, Philipp Willmes, Bernd Morgenstern, Rolf Hempelmann , et al. · 2022

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

Pairing Nitroxyl Radical and Phenazine with Electron-Withdrawing/-Donating Substituents in “Water-in-Ionic Liquid” for High-Voltage Aqueous Redox Flow Batteries Open

Zhifeng Huang, Rolf Hempelmann, Yiqiong Zhang, Shuangyin Wang, Ruiyong Chen · 2022

Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications Open

Daniel Rauber, Andreas Hofmann, Frederik Philippi, Christopher W. M. Kay, Tatiana Zinkevich , et al. · 2021

Ionic liquids are attractive and safe electrolytes for diverse electrochemical applications such as advanced rechargeable batteries with high energy densities. Their properties that are beneficial for energy storage and conversion include …

Synthesis and electrochemistry of remotely thioether‐functionalized disilenes Open

Thomas Büttner, Konstantin Weißhaar, Philipp Willmes, Volker Hüch, Bernd Morgenstern , et al. · 2021

We report the synthesis of p ‐methylthio‐functionalized disilenes with (oligo)phenylene‐linkers of different sizes between the thiomethyl group and the Si=Si moiety. 29 Si NMR and UV/vis data suggests that the linker‐size affects the Si=Si…

Pressure and Temperature Dependence of Local Structure and Dynamics in an Ionic Liquid Open

Filippa Lundin, Henriette Wase Hansen, Karolina Adrjanowicz, B. Frick, Daniel Rauber , et al. · 2021

A detailed understanding of the local dynamics in ionic liquids remains an important aspect in the design of new ionic liquids as advanced functional fluids. Here, we use small-angle X-ray scattering and quasi-elastic neutron spectroscopy …

Curled cation structures accelerate the dynamics of ionic liquids Open

Daniel Rauber, Frederik Philippi, Björn Kuttich, Julian Becker, Tobias Kraus , et al. · 2021

The curled cation structures of ionic liquids with three ether groups show significantly accelerated dynamics compared to the structural analogues with alkyl side chains.

In-Situ Encapsulation of FeCo Alloy in Nitrogen-Doped Carbon Framework as Advanced Bifunctional Cathode Catalysts for Zn-Air Batteries Open

Zhenzhen Wang, Xiaozhuang Zhou, Huihui Jin, Ding Chen, Jiawei Zhu , et al. · 2021

Influence of Precipitating Agent Concentration on Nanoparticles Size and Magnetic Properties of Zinc Ferrites Open

Elena Vasilica Trandafir, Radu‐George Ciocarlan, Aurel Pui, Rolf Hempelmann, Ovidiu Florin Caltun · 2020

A series of Zn ferrite nanoparticles was prepared by varying the concentration of precipitating agent (NaOH) in the range of 1 � 5 M. Carboxymethylcellulose (CMC) was used as capping agent for stabilizing the particles and to prevent agglo…

CCDC 1979444: Experimental Crystal Structure Determination Open

Daniel Rauber, Florian Heib, Tobias Dier, Dietrich A. Volmer, Rolf Hempelmann , et al. · 2020

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

Ether functionalisation, ion conformation and the optimisation of macroscopic properties in ionic liquids Open

Frederik Philippi, Daniel Rauber, Björn Kuttich, Tobias Kraus, Christopher W. M. Kay , et al. · 2020

The dynamics and liquid structures of ionic liquids are significantly influenced by the preferred geometries and the flexibilities of both cations and anions.

CCDC 1944801: Experimental Crystal Structure Determination Open

Daniel Rauber, Florian Heib, Michael Schmitt, Rolf Hempelmann · 2019

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

Layer-by-Layer modification of graphite felt with MWCNT for vanadium redox flow battery Open

Mathieu Etienne, Jose F. Vivo‐Vilches, Ivan Vakulko, Claire Genois, Liang Liu , et al. · 2019

From Current Science to School – the Facets of Green Chemistry on the Example of Ionic Liquids Open

Daniel Rauber, Frederik Philippi, Johann Seibert, Johannes Huwer, Harald Natter , et al. · 2019

Ionic liquids (ILs) are a widely investigated topic in various technical disciplines at the present time. A main focus of the research on ILs lies on applications in the field of a more sustainable, âgreenerâ chemistry that benefits fr…

Influence of Water on Tribolayer Growth When Lubricating Steel with a Fluorinated Phosphonium Dicyanamide Ionic Liquid Open

Luigi Urtis, Andrea Arcifa, Peng Zhang, Junxiao Du, Marzia Fantauzzi , et al. · 2019

This work aims to elucidate the role of environmental humidity on the tribological behavior of steel surfaces lubricated with an ionic liquid comprised of a fluorinated phosphonium cation—tributyl-3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-oc…

Transport properties of protic and aprotic guanidinium ionic liquids Open

Daniel Rauber, Frederik Philippi, Josef Zapp, Guido Kickelbick, Harald Natter , et al. · 2018

New protic and aprotic ionic liquids based on superbase cations show promising properties and enrich the field of cation classes

Demonstrating Sustainable Biomass Utilization and Processing Using Ionic Liquids – An Introduction to Undergraduate Chemistry Laboratories Open

Daniel Rauber, Michael Conrad, Johannes Huwer, Harald Natter, Rolf Hempelmann · 2017

A more sustainable, greener chemistry aiming at the utilization of renewable resources is a main research focus to reduce human environmental impact. Unfortunately, there is a lack of powerful, environmentally benign solvents for the two m…

Sustainable Electrochemical Depolymerization of Lignin in Reusable Ionic Liquids Open

Tobias K. F. Dier, Daniel Rauber, Dan Durneata, Rolf Hempelmann, Dietrich A. Volmer · 2017

Lignin’s aromatic building blocks provide a chemical resource that is, in theory, ideal for substitution of aromatic petrochemicals. Moreover, degradation and valorization of lignin has the potential to generate many high-value chemicals f…

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