scholarly journals A redox-active radical as an effective nanoelectronic component: stability and electrochemical tunnelling spectroscopy in ionic liquids

2016 ◽  
Vol 18 (40) ◽  
pp. 27733-27737 ◽  
Author(s):  
Alexander V. Rudnev ◽  
Carlos Franco ◽  
Núria Crivillers ◽  
Gonca Seber ◽  
Andrea Droghetti ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Redox Active ◽  
Tunnelling Current

PTM radical exhibits effective redox-mediated enhancement of tunnelling current, demonstrating its applicability as an active nanoelectronic component.

Electrochromism of Ferrocene- and Viologen-Based Redox-Active Ionic Liquids Composite

2018 ◽  
Vol 11 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Hironobu Tahara ◽  
Kazuaki Uranaka ◽  
Makoto Hirano ◽  
Tomoya Ikeda ◽  
Takamasa Sagara ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Redox Active

scholarly journals The Influence of the Nature of Redox-Active Moieties on the Properties of Redox-Active Ionic Liquids and on Their Use as Electrolyte for Supercapacitors

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6344
Author(s):  
Philipp S. Borchers ◽  
Patrick Gerlach ◽  
Yihan Liu ◽  
Martin D. Hager ◽  
Andrea Balducci ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Binary Mixtures ◽  
Thermal Characteristics ◽  
The Other ◽  
Scanning Calorimetry ◽  
Imidazolium Ionic Liquids ◽  
Redox Active

In this work, two new redox-active ionic liquids, one based on 2,2,6,6-tetramethylpiperidine-N-oxide and the other based on 4,4′-bipyridine, are synthesized and characterized. A ferrocene-based redox-active ionic liquid is used for referencing the results. All ionic liquids are formed via salt-metathesis from halogenate to bis(trifluoromethylsulfonyl)imide. Their fundamental thermal characteristics are assessed with differential scanning calorimetry. While the imidazolium ionic liquids show no melting point, the phase transition is well observable for the viologen-based ionic liquid. The properties of the neat redox-active ionic liquids and of binary mixtures containing these ionic liquids (0.1 m) and 1-butyl-1-methyl pyrrolidinium-bis(trifluoromethylsulfonyl)imide have been investigated. Finally, the use of these binary mixtures in combination with activated carbon-based electrodes has been considered in view of the use of these redox-active electrolytes in supercapacitors.

CHAPTER 8. Redox-active Immobilized Ionic Liquids and Polymer Ionic Liquids

2017 ◽  
pp. 225-261
Author(s):  
Thuan-Nguyen Pham-Truong ◽  
Jalal Ghilane ◽  
Hyacinthe Randriamahazaka
Keyword(s):  
Ionic Liquids ◽  
Redox Active

scholarly journals In situ XANES and EXAFS Analysis of Redox Active Fe Center Ionic Liquids

2015 ◽  
Vol 185 ◽  
pp. 156-161 ◽  
Author(s):  
Christopher A. Apblett ◽  
David M. Stewart ◽  
Robert T. Fryer ◽  
Julia C. Sell ◽  
Harry D. III Pratt ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Exafs Analysis ◽  
Redox Active ◽  
In Situ Xanes

Redox-active electrolyte supercapacitors using electroactive ionic liquids

2016 ◽  
Vol 66 ◽  
pp. 42-45 ◽  
Author(s):  
Han Jin Xie ◽  
Bruno Gélinas ◽  
Dominic Rochefort
Keyword(s):  
Ionic Liquids ◽  
Redox Active

scholarly journals Quinone Redox-active Ionic Liquids

2017 ◽  
Vol 59 (4) ◽  
Author(s):  
Andrew Patrick Doherty ◽  
Sean Patterson ◽  
Laura Diaconu Diaconu ◽  
Louise Graham ◽  
Rachid Barhdadi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Large Array ◽  
Transfer Processes ◽  
Redox Active ◽  
Electron Transfer Processes ◽  
Physical And Chemical

<p>Simple ionic liquids exhibit unique physical and chemical<br />properties that make them very useful for deployment in electrochemical<br />devices such as solvent-free electrolytes in capacitors and batteries.<br />However, incorporating redox functionality into ionic liquid<br />structures opens up in situ faradaic electrochemistry which allows access<br />to a large array of new electrochemical applications reliant upon<br />heterogeneous or homogenous electron-transfer processes. This paper<br />presents and discusses the opportunities and challenges for these types<br />of electro-materials across a myriad of applications by considering<br />exemplar quinone-functionalised ionic liquids.</p>

Electrochemistry and transport properties of electrolytes modified with ferrocene redox-active ionic liquid additives

2020 ◽  
Vol 98 (9) ◽  
pp. 554-563
Author(s):  
Bruno Gélinas ◽  
Thomas Bibienne ◽  
Mickaël Dollé ◽  
Dominic Rochefort
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Current Collector ◽  
Transport Numbers ◽  
Excess Charge ◽  
Li Ion Battery ◽  
Energy Storage Devices ◽  
Redox Active ◽  
Redox Shuttle ◽  
Li Ion

Used in their pure, undiluted form, ionic liquids usually result in Li-ion battery electrolytes with inadequate performance due low Li+ transport numbers (tLi+). Alternatively, they can be used as additives dissolved in carbonates to maintain a high tLi+ while providing the electrolyte with additional properties such as resistance to combustion, current collector passivation, and decreased Li dendritic growth. Additional properties can be imparted to the ionic liquid via the modification of their structure. Ionic liquids modified with electroactive moieties such as ferrocene (Fc-IL) can be used as an additive in Li-ion battery (LiB) electrolytes to prevent cathode over-oxidation via the redox shuttle mechanism. The aim of the present work is to evaluate the properties of LiB electrolytes modified with such Fc-IL at different concentrations. At low concentrations (0.3–0.5 mol/L), the redox-active ionic liquid behaves as expected for a redox shuttle. We show that at 1 mol/L, however, the redox ionic liquid yields a different discharge behavior after the overcharging step, providing an increase in discharge capacity. This behavior is linked to the deposition of the ferrocenium-IL at the positive electrode. Such electrolyte is non-flammable and is highly efficient to achieve shuttling of excess charge. Based on this principle, it is expected that novel ionic liquids can be designed for development of other types of additives and contribute to developing safer battery electrolytes. As a part of this commemorative issue, this contribution highlights the type of collaborative research currently being done on energy storage devices at the Department of Chemistry at the Université de Montréal.

Sign in / Sign up

Export Citation Format

Share Document