scholarly journals Enhanced capacitance of nitrogen-doped hierarchically porous carbide-derived carbon in matched ionic liquids

2015 ◽  
Vol 3 (37) ◽  
pp. 18906-18912 ◽  
Author(s):  
J.-K. Ewert ◽  
D. Weingarth ◽  
C. Denner ◽  
M. Friedrich ◽  
M. Zeiger ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Nanoporous Carbon ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Supercapacitor Performance ◽  
Carbide Derived Carbon

Supercapacitor performance can be significantly increased when matching a suitable ionic liquid to nitrogen-doped nanoporous carbon.

Synthesis of ultrahigh-surface-area nitrogen-doped porous carbon materials from carboxymethyl cellulose based protic polyanion ionic liquids for high performance supercapacitors

2020 ◽  
Vol 4 (7) ◽  
pp. 3418-3427 ◽  
Author(s):  
Zaiquan Li ◽  
Qinqin Xu ◽  
Lin Zhang ◽  
Xia Wang ◽  
Feng He ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Surface Area ◽  
Porous Carbon ◽  
Carboxymethyl Cellulose ◽  
High Performance ◽  
Carbon Materials ◽  
Polycarboxylic Acid ◽  
Nitrogen Doped ◽  
Porous Carbon Materials ◽  
Supercapacitor Performance

Carboxymethyl cellulose was used as a sustainable polycarboxylic acid to prepare polyprotic ionic liquids, which were successfully used as precursors for the synthesis of ultrahigh-surface-area N-doped porous carbon materials with excellent supercapacitor performance.

scholarly journals High-pressure salt templating strategy toward intact isochoric hierarchically porous carbon monoliths from ionic liquids

RSC Advances ◽  
2017 ◽  
Vol 7 (81) ◽  
pp. 51096-51103
Author(s):  
Zhen Zhang ◽  
Junzong Feng ◽  
Yonggang Jiang ◽  
Jian Feng
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Porous Carbon ◽  
Hierarchically Porous ◽  
Carbon Monolith

Using a high-pressure salt templating approach, a crack-free, hierarchically porous carbon monolith with good monolithic formability and integrity was prepared from an ionic liquid.

scholarly journals Fast Conversion of Ionic Liquids and Poly(Ionic Liquid)s into Porous Nitrogen-Doped Carbons in Air

2016 ◽  
Vol 17 (4) ◽  
pp. 532 ◽  
Author(s):  
Yongjun Men ◽  
Martina Ambrogi ◽  
Baohang Han ◽  
Jiayin Yuan
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Nitrogen Doped ◽  
Poly Ionic Liquid

scholarly journals Prospects and Design Insights of Neat Ionic Liquids as Supercapacitor Electrolytes

2021 ◽  
Vol 9 ◽  
Author(s):  
Kallidanthiyil Chellappan Lethesh ◽  
Musbaudeen O. Bamgbopa ◽  
Rahmat Agung Susantyoko
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Properties ◽  
Electrode Materials ◽  
Full Potential ◽  
Design Strategies ◽  
Supercapacitor Performance ◽  
And Performance ◽  
Operating Potential ◽  
Ion Size

Ionic liquids present an opportunity to design efficient electrolytes for supercapacitors, which are among the most extensively studied electrochemical energy storage systems. Ionic liquids are promising candidates for supercapacitor electrolytes because they can eliminate issues associated with aqueous and organic solvent-based electrolytes, such as narrow operating potential windows, safety, and performance. The full potential of ionic liquids as electrolytes in supercapacitors need to be further explored due to promising previous efforts invested in ionic liquid-based electrolyte systems for supercapacitor. This review aims to provide an outlook on neat (pure) ionic liquids applied as supercapacitor electrolytes to isolate the prospects and influences of ionic liquids in supercapacitor electrolyte systems. This work primarily focuses on ionic liquid chemistry links to their performance in supercapacitor electrolytes. Deduced features of importance to supercapacitor performance include the presence of functional groups in the ionic liquids, the ionic liquids physicochemical and electrochemical properties. With the different classes of ionic liquids evaluated, ion size-pore size matching of ionic liquid electrolytes and electrode materials, respectively, affect resulting capacitances and energy densities. Several design strategies to enhance supercapacitor performance by improving ionic liquid transport and electrochemical properties are proposed. The proposed strategies and obtained insights consequently informed further discussions on challenges associated with the commercialization of ionic liquids electrolytes.

scholarly journals Bioderived Ionic Liquids and Salts with Various Cyano Anions as Precursors for Doped Carbon Materials

2021 ◽  
Vol 22 (19) ◽  
pp. 10426
Author(s):  
Alina Brzęczek-Szafran ◽  
Bartłomiej Gaida ◽  
Agata Blacha-Grzechnik ◽  
Karolina Matuszek ◽  
Anna Chrobok
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Carbon Material ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Molecular Structures ◽  
Nitrogen Doped ◽  
Co Doped

Carbohydrate moieties were combined with various cross-linkable anions (thiocyanate [SCN], tetracyanoborate [TCB], tricyanomethanide [TCM], and dicyanamide [DCA]) and investigated as precursors for the synthesis of nitrogen-doped and nitrogen-/sulfur-co-doped carbons. The influence of the molecular structures of the precursors on their thermophysical properties and the properties of the derived carbon materials was elucidated and compared to petroleum-derived analogs. A carbohydrate-based ionic liquid featuring an [SCN] anion yielded more carbon residues upon carbonization than its 1-ethyl-3-methylimidazolium analog, and the resulting dual-doping of the derived carbon material translated to enhanced catalytic activity in the oxygen reduction reaction.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

Ionic Liquid Assisted Synthesis of Some 2-Aminobenzenethiols

2019 ◽  
Vol 16 (7) ◽  
pp. 550-555
Author(s):  
Dinesh K. Jangid ◽  
Keshav L. Ameta ◽  
Surbhi Dhadda ◽  
Anjali Guleria ◽  
Prakash G. Goswami ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Comparative Study ◽  
Maximum Yield ◽  
Efficient Synthesis ◽  
Target Molecules ◽  
Presence And Absence

Ionic Liquid assisted efficient synthesis of some 2-aminobenzenethiols has been reported using three different Ionic Liquids (ILs) namely methylimidazolium tetrafluoroborate [MIM]+[BF4]−, methylimidazolium chloride [MIM]+[Cl]− and methylimidazolium nitrate [MIM]+[NO3]−. A comparative study has been carried out for the synthesis of target molecules in the presence and absence of IL, leading to conclusion that maximum yield has been observed with [MIM]+[BF4]−.

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