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WS2 Nanotube-Embedded SiOC Fibermat Electrodes for Sodium-Ion Batteries
WS2 Nanotube-Embedded SiOC Fibermat Electrodes for Sodium-Ion Batteries
This is the first work to study WS2NTs confined within SiOC fibers to form a heterogeneous structure that provides stable cycling performance in high current densities in a Na+-ion half-cell configuration.
When tested in a sodium-ion half-cell, the composite electrode showed increased stability at high current densities and robust capacity retention (approximately 2–3 times higher than the capacity of the neat WS2NTs) at subsequent cycles.
Enhanced Li-Ion Rate Capability and Stable Efficiency Enabled by MoSe2 Nanosheets in Polymer-Derived Silicon Oxycarbide Fiber Electrodes
Enhanced Li-Ion Rate Capability and Stable Efficiency Enabled by MoSe2 Nanosheets in Polymer-Derived Silicon Oxycarbide Fiber Electrodes
This work is the first to present MoSe2 nano-sheets combined with polymer-derived PVP/SiOC fiber mats to yield a free-standing electrode.
Stable cycling in higher current densities in LIB half-cell configuration.
A small quantity of PVP was used as a spinning agent, mainly to facilitate fiber spinnability.
Evolution of the fibers from as spun to cross-linked and finally to the pyrolyzed form was confirmed by the FTIR spectroscopy. Raman and XPS spectroscopic studies.
Capacity over traditional robust negative electrode material for LIB achieved.
Higher capacity than MoSe2 was achieved without the addition of current collector.
WS2 Nanosheet Loaded Silicon-Oxycarbide Electrode for Sodium and Potassium Batteries
WS2 Nanosheet Loaded Silicon-Oxycarbide Electrode for Sodium and Potassium Batteries
Fabrication of SiOC/WS2 nanosheet composite fibermat is demonstrated via electrospinning of a preceramic polymer solution dispersed with exfoliated nanosheets followed by high-temperature pyrolysis.
The composite was then investigated as a potential electrode for beyond lithium-ion electrochemical energy storage devices, i.e., Na+ and K+ batteries.
Chemical functionalization of WS2 nanosheets in PDC fibermats in adequate amounts ensured better performance of the composite electrode when used in alkali metal ion half-cell at gradually increasing currents or harsher cycling conditions.
The SiOC material provided additional alkali metal ion storage sites and acted as a container space for volume changes induced by WS2.
Conferences: Poster Presentation and In-person talks
2023
Magnifying Rate Capability and Efficiency of Li-Ion Storage Mechanism via Next-Generation Standalone Electrodes Enabled by MoSe2 Nanosheets in SiOC High Aspect Ratio Structures Sonjoy Dey and Gurpreet Singh; Kansas State University, United States; MRS Spring 2023, April 14, 2023 – Oral Presentation.
Distinctively Structured WS2 Nanotubes Embedded in SiOC Fibers for High-Rate Sodium Ion Storage; Sonjoy Dey and Gurpreet Singh; Kansas, MRS Spring 2023, April 14, 2023 – Oral Presentation.
Sonjoy Dey: WS2 Nanotube Embedded SiOC Fibers; Sonjoy Dey and Gurpreet Singh; Kansas, PIRE PDC MatCom-ComMat Workshop 2023; April 14, 2023 – Oral Presentation.
Na+ ion storage behavior of WS2 nanotube encapsulated polymer derived SiOC fibers: Preservation of structural integrity and enhancement of cycling stability; Sonjoy Dey and Gurpreet Singh; Kansas, ACS Fall 2023, August 13-17, 2023 – Poster Presentation.
Tailoring WS2 nanosheets in SiOC fiber matrix for stable and efficient Na+ and K+ ion storage for next generation rechargeable batteries; Sonjoy Dey and Gurpreet Singh; Kansas, ACS Fall 2023, August 13-17, 2023 – Oral Presentation.
Investigating Na+ ion Storage Behavior of WS2NT Encapsulated SiOC Fibers; Sonjoy Dey and Gurpreet Singh; Kansas, MS&T 2023, August 13-17, 2023 – Poster Presentation.
Investigation of Sodium and Potassium Ion Storage Behavior of WS2 Nanosheet Loaded Polymer Derived SiOC Fibers: Sonjoy Dey; Gurpreet Singh; Kansas State University, MS&T 2023, August 13-17, 2023 – Oral Presentation.
Regulating Na+ and K+ Ion Storage into TMD Alloys: Effect of Upper Voltage Cut-off Technique: Sonjoy Dey; Arijit Roy; Gurpreet Singh; Kansas State University, MS&T 2023, August 13-17, 2023 – Poster Presentation.
Investigating Na+ Ion Storage Behavior of Distinctive Hybrid Structure of WS2NT Encapsulated SiOC Fibers; Sonjoy Dey and Gurpreet Singh; Kansas, IMECE 2023, Oct 29-Nov 2, 2023 – Oral Presentation.
Exploring Na+ and K+ Ion Storage Behavior of Ws2 Nanosheet- Loaded SiOC Fiber Structures; Sonjoy Dey and Gurpreet Singh; Kansas, IMECE 2023, Oct 29-Nov 2, 2023 – NSF Poster Presentation.
Polymer-derived ceramic paper-like electrodes for multifunctional alkali-metal ion batteries; Sonjoy Dey, Shakir Bin Mujib, and Gurpreet Singh; Kansas; SES 2023; Oct 8-11, 2023 – Poster Presentation.
2022
Sonjoy Dey. (2022). TMD Reinforced Polymer-derived Ceramic Fibermats. NSF PIRE PDC Workshop, Hirschegg, Austria. - Oral Presentation.
S. Dey and G. Singh (2022). Building Better Lithium-ion Battery Anodes with Enhanced Capability and Cycling Efficiency Using MoSe2/SiOC Freestanding Structure Symposium: Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials. MS&T 22: Materials Science and Technology. Pittsburgh, PA, October 2022. - Oral Presentation.
S. Mujib, S. Dey, and G. Singh (2022). Lithium Storage Capacity of Carbon-rich Polymer-derived Ceramic Electrodes. MS&T22: Materials Science & Technology, October 2022. - Poster Presentation.
S. Mujib, S. Dey, and G. Singh (2022). Lithium Storage Capacity of Carbon-rich Polymer-derived Ceramic Electrodes. MS&T22:. Materials Science & Technology. - Oral Presentation.
S. Dey and G. Singh (2022). Lithium-ion Battery Anode with High-Rate Capability and Stable Cycling Efficiency enabled by MoSe2 Nanosheets in Polymer Derived Ceramic Matrix. P05: Molecular Preparative Approaches to Functional Materials MSE Congress, Darmstadt, Germany, September 2022. - Poster Presentation.
S. Dey and G. Singh (2022). Amplifying rate capability and efficiency of Li-ion battery anodes by MoSe2/SiOC self-supported structure. Battery Materials & Interfaces: Anodes, Cathodes & Novel Electrolytes. ACS Fall 2022, Chicago, Virtual, August 2022. - Oral Presentation.
S. Dey and G. Singh (2022). TMD Reinforced Polymer-derived Ceramic Fibermats. Fifth Annual NSF-PIRE-PDC Workshop. Hirschegg, Austria, August 2022. - Oral Presentation.
S. Dey and G. Singh (2022). Supplementing Rate Capability and Cycling Efficiency of Li-ion Battery Anodes using MoSe2/SiOC self-supporting Structure. PACC-S1-013-2022. Session: Batteries and Various Topics. ACerS Pan American Ceramics Congress, Panama City, Panama, July 2022. - Oral Presentation.
S. Dey and G. Singh (2022). EN05.22.07. Augmenting the Rate Capability and Efficiency of Battery Anodes by Fabrication of MoSe2/SiOC Self-Supported Structure. 2022 MRS Spring Meeting & Exhibit, Virtual, May 2022. - Poster Presentation.
2021
Sonjoy Dey (2021): Nano-sheet Reinforced Polymer-derived Ceramic Fibermats (Video presentation/PowerPoint). NSF PIRE PDC Workshop, Boulder, CO. - Poster Presentation.
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