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Alexei P. Sokolov
University of Tennessee
467Publications
48H-index
7,667Citations
Publications 467
Newest
#1Martin Tress (UT: University of Tennessee)H-Index: 1
#2Kunyue Xing (UT: University of Tennessee)H-Index: 3
Last.Alexei P. Sokolov (UT: University of Tennessee)H-Index: 48
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#1Michelle Lehmann (UT: University of Tennessee)
#2Guang Yang (ORNL: Oak Ridge National Laboratory)H-Index: 8
Last.Tomonori Saito (UT: University of Tennessee)H-Index: 27
view all 13 authors...
Abstract Sodium-based energy storage systems are promising candidates for electric vehicles and grid-level energy storage applications. The advancement of sodium-based energy storage systems relies on the development of high performance sodium-ion conducting electrolytes and membranes that exhibit high ionic conductivity and mechanical stability. A crosslinked poly(ethylene oxide) based polymer electrolyte was developed that demonstrates high ionic conductivity, as well as excellent mechanical s...
#1Tao HongH-Index: 6
#2Peng-Fei Cao (ORNL: Oak Ridge National Laboratory)H-Index: 12
Last.Tomonori Saito (ORNL: Oak Ridge National Laboratory)H-Index: 27
view all 11 authors...
#1Jagjit Nanda (ORNL: Oak Ridge National Laboratory)H-Index: 35
#2Guang Yang (ORNL: Oak Ridge National Laboratory)H-Index: 8
Last.Alexei P. Sokolov (UT: University of Tennessee)H-Index: 48
view all 10 authors...
Summary We employ tip-enhanced Raman spectroscopy (TERS) to study model amorphous silicon (a-Si) thin film anodes galvanostatically cycled for different numbers. For the 1× cycled a-Si, TERS shows good correlation between solid electrolyte interphase (SEI) topography and chemical mapping, corresponding to distribution of lithium ethylene dicarbonate (LEDC) and poly (ethylene oxide) (PEO)-like oligomer species. Subsequent electrochemical cycling makes the SEI relatively thick and rough with the c...
#1F. Wieland (Technical University of Dortmund)
#2Vera Bocharova (ORNL: Oak Ridge National Laboratory)H-Index: 30
Last.C. Gainaru (Technical University of Dortmund)H-Index: 24
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Combining experimental results obtained with X-ray scattering and field-gradient nuclear magnetic resonance (NMR) and an assessment of new and previous dielectric and rheology data, our study focuses on the molecular weight (Mw) evolution of local structure and dynamics in a homologous series of covalently bonded ionic liquids. Performed on a family of electrolytes with a tailored degree of ionic decoupling, this study reveals the differences between monomeric and oligomeric melts with respect t...
#1Anne-Caroline Genix (University of Montpellier)H-Index: 1
#2Vera Bocharova (ORNL: Oak Ridge National Laboratory)H-Index: 30
Last.Julian Oberdisse (University of Montpellier)H-Index: 26
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The dynamic and static properties of the interfacial region between polymer and nanoparticles have wide-ranging consequences on performances of nanomaterials. The thickness and density of the static layer are particularly difficult to assess experimentally due to superimposing nanoparticle interactions. Here, we tune the dispersion of silica nanoparticles in nanocomposites by pre-adsorption of polymer layers in the precursor solutions, and by varying the molecular weight of the matrix chains. Na...
#1Peng-Fei Cao (ORNL: Oak Ridge National Laboratory)H-Index: 12
#2Guang Yang (ORNL: Oak Ridge National Laboratory)H-Index: 8
Last.Tomonori Saito (ORNL: Oak Ridge National Laboratory)H-Index: 27
view all 11 authors...
Although several principles have been recognized to fabricate a nominal “better” binder, there continues to be a lack of a rational design and synthesis approach that would meet the robust criteria required for silicon (Si) anodes. Herein, we report a synthetic polymer binder, i.e., catechol-functionalized chitosan cross-linked by glutaraldehyde (CS-CG+GA), that serves dual functionalities: (a) wetness-resistant adhesion capability via catechol grafting and (b) mechanical robustness via in situ ...
#1Alexander Kisliuk (ORNL: Oak Ridge National Laboratory)H-Index: 22
#2Vera Bocharova (ORNL: Oak Ridge National Laboratory)H-Index: 30
Last.Alexei P. Sokolov (UT: University of Tennessee)H-Index: 48
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Abstract We analyze conductivity of polymerized ionic liquids with focus on fundamental limitations hindering faster charge transport in polymer electrolytes. We emphasize that to achieve the required ionic conductivity ∼10 −3 S/cm in dry polymer electrolytes, a decoupling of ion transport from segmental dynamics is required. We demonstrate that two competing mechanisms control decoupling of ion transport: electrostatic interactions that dominates for small ions such Li, and elastic force that d...
#1Dmitry VoylovH-Index: 6
#2Vera BocharovaH-Index: 30
Last.Alexei P. SokolovH-Index: 48
view all 13 authors...
Tip-enhanced Raman spectroscopy (TERS) has been established as one the most efficient analytical techniques for probing vibrational states with nanoscale resolution. While TERS may be a source of unique information about chemical structure and interactions, it has a limited use for materials with rough or sticky surfaces. Development of the TERS approach utilizing a non-contact scanning probe microscopy mode can significantly extend the number of applications. Here we demonstrate a proof of the ...
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