Joseph A. Dura

Synthesis of Bulk Superconducting LiNbO$_2$ Crystals through CaH$_2$ Reduction

Ryan Paxson, Stephanie J. Hong, Bicky Moirangthem, Parham Kabirifar et autres

We have synthesized layered superconducting LiNbO$_2$ crystals through a bulk phase transformation from LiNbO$_3$ single crystals via CaH$_2$ reduction. As the Nb valence is reduced from 5+ to 3+, the material undergoes a structural transformation to the resulting product, LiNbO$_2$, which is …

Synthesis of Bulk Superconducting LiNbO$_2$ Crystals through CaH$_2$ Reduction

Ryan Paxson, Stephanie J. Hong, Bicky Moirangthem, Parham Kabirifar et autres

We have synthesized layered superconducting LiNbO$_2$ crystals through a bulk phase transformation from LiNbO$_3$ single crystals via CaH$_2$ reduction. As the Nb valence is reduced from 5+ to 3+, the material undergoes a structural transformation to the resulting product, LiNbO$_2$, which is …

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Correction to “Liquid Structure with Nano-Heterogeneity Promotes Cationic Transport in Concentrated Electrolytes”

Oleg Borodin, Liumin Suo, Mallory Gobet, Xiaoming Ren et autres

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Controlling Polymer Electrolyte Interfacial Morphology through Chemical Interactions

Joseph A. Dura, Sangcheol Kim, Kirt A. Page, Christopher L. Soles

Owing to its unique mechanical properties, chemical resistance, and ion conductivity, Nafion is one of the most widely used polymer electrolytes. In hydrogen fuel cells, it constitutes both the macroscopic membrane separating the anode and the cathode, and as a thin film, …

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Surface Film Formation Study at LLZO/Liquid Electrolyte Interface

Saya Takeuchi, Joseph A. Dura, Richmond Wang, Yi‐Xiu Chen et autres

Lithium lanthanum zirconium oxide (LLZO) is a promising solid state electrolyte candidate for a next generation rechargeable battery due to its high lithium-ion conductivity, mechanical strength (indicated by an order of magnitude higher shear modulus than lithium metal), and good chemical stability …

Impact of uncompensated resistance on Hads-terminated Pt electrodeposition

Yihua Liu, M. C. Lafouresse, Ugo Bertocci, John E. Bonevich et autres

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Structural Relaxation and Nanodomain Dynamics in Highly Concentrated Electrolytes for Zinc Batteries

Antonio Faraone, Fei Wang, Saya Takeuchi, Joseph A. Dura

QuasiElastic Neutron Scattering (QENS) was employed to investigate the molecular-level dynamics of highly concentrated zinc-ion electrolytes (HCZE), a water-in-salt electrolyte enabling zinc batteries. Using heavy water, the coherent neutron scattering component of the spectra is enhanced, which probes the collective dynamics of …

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Dealloyed Pt74Ni26 and Pt26Ni74 Electrodeposited Thin Film Electrocatalysts for Oxygen Reduction

Carlos M. Hangarter, Eric D. Rus, Yihua Liu, Jong-Won Shin et autres

Electrodeposition and microstructure of thin films close to Pt75Ni25 and Pt25Ni75 stoichiometry are described and their catalytic oxygen reduction reaction performance, dealloying, and strain evolution detailed. Multiple techniques are used to characterize the morphology, crystalline structure, and chemical homogeneity of the as-deposited …

Morphology of Thin-Film Nafion on Carbon as an Analogue of Fuel Cell Catalyst Layers

Corey Ryan Randall, Lianfeng Zou, Howard Wang, Jingshu Hui et autres

Species transport in thin-film Nafion heavily influences proton-exchange membrane (PEMFC) performance, particularly in low-platinum-loaded cells. Literature suggests that phase-segregated nanostructures in hydrated Nafion thin films can reduce species mobility and increase transport losses in cathode catalyst layers. However, these structures have primarily …

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Ionic liquid gating induced insulating phase transition in LaNiO3 thin films

Richmond Wang, Ji Hun Park, Rohit Kumar Pant, Suraj Maurya et autres

Perovskite rare-earth nickelates exhibit intriguing electrical and optical properties, such as metal-to-insulator transitions, resulting from the strong interplay between charge disproportionation and electron correlation. Of these materials, lanthanum nickelate, ${\mathrm{LaNiO}}_{3}$, is the only exception where the metallic phase is robust at all …

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High Sulfur Loading and Capacity Retention in Bilayer Garnet Sulfurized‐Polyacrylonitrile/Lithium‐Metal Batteries with Gel Polymer Electrolytes

Changmin Shi, Saya Takeuchi, G. V. Alexander, Tanner R. Hamann et autres

Abstract The cubic‐garnet (Li 7 La 3 Zr 2 O 12 , LLZO) lithium–sulfur battery shows great promise in the pursuit of achieving high energy densities. The sulfur used in the cathodes is abundant, inexpensive, and possesses high specific capacity. In addition, …

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Modification of Nafion's nanostructure for the water management of PEM fuel cells

Yuanchao Li, Natalie Linnell Schwab, Robert M. Briber, Joseph A. Dura et autres

Abstract A PEM fuel cell with the Nafion ionomer phase of the cathode catalyst layer (CL) that was exposed to hot dry gas during the hot‐pressing process showed improved performance over the whole current density range and ~ 220% peak power increase …

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