scholarly journals In Situ NMR Spectroscopy of Supercapacitors: Insight into the Charge Storage Mechanism

2013 ◽  
Vol 135 (50) ◽  
pp. 18968-18980 ◽  
Author(s):  
Hao Wang ◽  
Alexander C. Forse ◽  
John M. Griffin ◽  
Nicole M. Trease ◽  
Lorie Trognko ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
In Situ Nmr Spectroscopy ◽  
In Situ Nmr ◽  
Insight Into

scholarly journals Mesoscopic simulations of the in situ NMR spectra of porous carbon based supercapacitors: Electronic structure and adsorbent reorganisation effects

2021 ◽  
Author(s):  
Anagha Sasikumar ◽  
Anouar Belhboub ◽  
Camille Bacon ◽  
Alexander C. Forse ◽  
John Griffin ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Nmr Spectroscopy ◽  
Molecular Species ◽  
Porous Carbon ◽  
Nmr Spectra ◽  
Charge Storage ◽  
In Situ Nmr Spectroscopy ◽  
In Situ Nmr ◽  
Carbon Based

In situ NMR spectroscopy is a powerful technique to investigate charge storage mechanisms in carbon-based supercapacitors thanks to its ability to distinguish ionic and molecular species adsorbed in the porous...

scholarly journals Non-Selective Dimerization of Vinyl Silanes by the Putative (Phenanthroline)PdMe Cation to 1,4-Bis(trialkoxysilyl)butenes

Inorganics ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 102
Author(s):  
Sandun Perera ◽  
Michael Findlater
Keyword(s):  
Nmr Spectroscopy ◽  
Palladium Complex ◽  
Organic Products ◽  
Vinyl Silanes ◽  
In Situ Nmr Spectroscopy ◽  
In Situ Nmr ◽  
Moderate Yield

Activation of the dialkylpalladium complex (phen)Pd(CH3)2 (phen = 1,10-phenanthroline) with B(C6F5)3 affords a competent catalyst for the dimerization of vinyl silanes. All organic products of the catalytic dimerization of trialkoxyvinylsilanes were characterized by in situ NMR spectroscopy and GC–MS. The putative palladium cation was characterized by NMR spectroscopy. Upon activation, the palladium complex generated products in moderate yield (60–70%) and selectivity (~60:40, dimer:disproportionation products).

scholarly journals The Role of Al3+-Based Aqueous Electrolytes in the Charge Storage Mechanism of MnOx Cathodes

2020 ◽  
Author(s):  
Véronique Balland ◽  
Mickaël Mateos ◽  
Kenneth D. Harris ◽  
Benoit Limoges
Keyword(s):  
Manganese Oxide ◽  
Critical Analysis ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Storage Mechanism ◽  
Main Charge ◽  
Charge Storage Mechanism ◽  
The Subject

<p>Rechargeable aqueous aluminium batteries are the subject of growing interest, but the charge storage mechanisms at manganese oxide-based cathodes remain poorly understood with as many mechanisms as studies. Here, we use an original <i>in situ</i> spectroelectrochemical methodology to unambiguously demonstrate that the reversible proton-coupled MnO<sub>2</sub>-to-Mn<sup>2+</sup> conversion is the main charge storage mechanism occurring at MnO<sub>2</sub> cathodes over a range of slightly acidic Al<sup>3+</sup>-based aqueous electrolytes. In Zn/MnO<sub>2</sub> assemblies, this mechanism is associated with high gravimetric capacity and discharge potentials, up to 560 mAh·g<sup>-1</sup> and 1.76 V respectively, attractive efficiencies (<i>CE</i> > 98.5 % and <i>EE</i> > 80%) and excellent cyclability (> 750 cycles at 10 A·g<sup>-1</sup>). Finally, we conducted a critical analysis of the data previously published on MnO<sub>x</sub> cathodes in Al<sup>3+</sup>-based aqueous electrolytes to conclude on a universal charge storage mechanism, <i>i.e.</i>, the reversible electrodissolution/electrodeposition of MnO<sub>2</sub>.<i></i></p>

Interactions in ionic liquids probed by in situ NMR spectroscopy

2014 ◽  
Vol 192 ◽  
pp. 55-58 ◽  
Author(s):  
Ralf Giernoth ◽  
Andreas Bröhl ◽  
Martin Brehm ◽  
Yves Lingscheid
Keyword(s):  
Ionic Liquids ◽  
Nmr Spectroscopy ◽  
In Situ Nmr Spectroscopy ◽  
In Situ Nmr
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