Výsledky vyhledávání - "Naba K. Karan"

Effect of electrochemical cycling on microstructures of nanocomposite silicon electrodes using hyperpolarized 129Xe and 7Li NMR spectroscopy

Autor: Yougang Mao, Naba K. Karan, Ravi Kumar, Russell Hopson, Pradeep R. Guduru, Brian W. Sheldon, Li-Qiong Wang

Publikováno v: Journal of Vacuum Science & Technology A. 40:043203

The microstructural stability of composite electrodes during electrochemical cycling is critically important as it dictates the performance of Li-ion batteries. The issue becomes even more important for the high capacity alloying anode such as silico

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::954fc9696546ade98e676353ee770d76
https://doi.org/10.1116/6.0001768

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Investigation of Solid Electrolyte Interphase Formed on Si Nanoparticle Composite Electrodes Using Hyperpolarized 129Xe Nuclear Magnetic Resonance Spectroscopy

Autor: Pradeep R. Guduru, Naba K. Karan, Li-Qiong Wang, Russell Hopson, Yougang Mao, Myeonghun Song

Publikováno v: Energy & Fuels. 31:5622-5628

Solid electrolyte interphase (SEI) plays an important role in determining electrochemical performances of Li-ion batteries. The ideal SEI layer protects the electrolyte from being further reduced on the electrode surface and allows Li-ion diffusion i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36e7374eb19c7db978cf0956a16f6bd2
https://doi.org/10.1021/acs.energyfuels.7b00250

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Role of Elastic Strain on Electrocatalysis of Oxygen Reduction Reaction on Pt

Autor: Gery R. Stafford, Pradeep R. Guduru, Shouheng Sun, Ugo Bertocci, Deepa Vairavapandian, Tuhina Adit Maark, Naba K. Karan, M. C. Lafouresse, Vijay A. Sethuraman, Andrew A. Peterson

Publikováno v: The Journal of Physical Chemistry C. 119:19042-19052

The effect of elastic strain on catalytic activity of platinum (Pt) towards oxygen reduction reaction (ORR) is investigated through de-alloyed Pt-Cu thin films; stress evolution in the de-alloyed layer and the mass of the Cu removed are measured in r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::145b91edcc17985a9ccc481e5209d9cc
https://doi.org/10.1021/acs.jpcc.5b06096

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Coupling of conductivity to the relaxation process in polymer electrolytes

Autor: Naba K. Karan, Ram S. Katiyar, Reji Thomas, Dillip K. Pradhan

Publikováno v: Materials Chemistry and Physics. 147:1016-1021

Conductivity relaxation using modulus formalism has been used to explore the coupling of ionic conductivity to dielectric relaxation in polymer electrolyte based on polyethylene oxide complexed with various content of LiAsF6. The temperature dependen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ae0dfa08e1668c4c8bad03094e2575c
https://doi.org/10.1016/j.matchemphys.2014.06.053

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Observation of ionic transport and ion-coordinated segmental motions in composite (polymer-salt-clay) solid polymer electrolyte

Autor: Ram S. Katiyar, Dillip K. Pradhan, Tapabrata Dam, Naba K. Karan, Reji Thomas

Publikováno v: Ionics. 21:401-410

A solution casting method was successfully used to realize polymer nanocomposite electrolytes consisting of polyethylene oxide as polymer host, lithium hexafluoroarsenate as salt, and dodecylamine modified mont- morillonite clay as filler. Structural

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71430733431607a07ec6e4a24bdcd55a
https://doi.org/10.1007/s11581-014-1181-5

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Bulk-Sensitive Characterization of the Discharged Products in Li–O2 Batteries by Nonresonant Inelastic X-ray Scattering

Autor: Timothy T. Fister, Peng Du, Naba K. Karan, Anthony K. Burrell, Mahalingam Balasubramanian

Publikováno v: The Journal of Physical Chemistry C. 116:18132-18138

Understanding the nature of discharged products is critical to identifying suitable electrolyte systems for Li–O2 batteries. We have employed nonresonant inelastic X-ray scattering (NIXS), which is a hard X-ray photon-in photon-out technique to mon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::278b712a118bdd3ed687e2859dc94152
https://doi.org/10.1021/jp306298e

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Synthesis, Characterization, and Structural Modeling of High-Capacity, Dual Functioning MnO2Electrode/Electrocatalysts for Li-O2Cells

Autor: Yang Ren, Mahalingam Balasubramanian, Jeffrey Greeley, Lynn Trahey, Maria K. Y. Chan, Michael M. Thackeray, Larry A. Curtiss, Naba K. Karan, Jun Lu, Anthony K. Burrell

Publikováno v: Advanced Energy Materials. 3:75-84

It has become clear that cycling lithium-oxygen cells in carbonate electrolytes is impractical, as electrolyte decomposition, triggered by oxygen reduction products, dominates the cell chemistry. This research shows that employing an α-MnO2/ramsdell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::467c3f5ece30f179182236e6895d9c13
https://doi.org/10.1002/aenm.201200037

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Structure of Lithium Peroxide

Autor: Naba K. Karan, Mahalingam Balasubramanian, Maria K. Y. Chan, Tim T. Fister, Eric L. Shirley, Yang Ren, Jeffrey Greeley

Publikováno v: The Journal of Physical Chemistry Letters. 2:2483-2486

The reliable identification of lithium oxide species, especially lithium peroxide (Li2O2), is of vital importance to the study of Li-air batteries. Previous X-ray diffraction studies of Li2O2 resul...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::431180518ac2a79f08c57209727123b2
https://doi.org/10.1021/jz201072b

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