DEVELOPMENT AND CHARACTERIZATION OF SULFIDE BASED ACTIVE MATERIALS FOR ELECTROCHEMICAL APPLICATIONS

Download

SavaşUygur_Cansu_Ph.D.Thesis.pdf

Date

2022-6-20

Author

SAVAŞ UYGUR, CANSU

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

253
views

677
downloads

Next-generation electrochemical applications have faced a challenge to be improved in terms of performance with the increasing demand for new technologies. Although oxide-based active materials are widely used material groups in the electrochemical applications, including batteries, electrolyzers, capacitors and electrochemical catalysis, research in nitride/ phosphide/ boride/ sulfide-based active materials are increasing trend topic to overcome the shortcomings of the metal oxide groups. Sulfide-based active materials show remarkable capacitive and electrocatalytic behavior, which has the potential to be replaced with their commercial counterparts. However, the reaction mechanism behind the capacitive and electrocatalytic performance of certain parts of this group either has not been understood completely or even studied/published. In this study, sulfide-based active materials and/or their composites were synthesized and compounds that were not reported in the literature before were used to improve the electrochemical behavior, including reaction mechanisms and performance. Structural and morphological characterization of synthesized active materials was carried out by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and particle size analysis (PSA). Energy dispersive spectroscopy (EDS) and Rietveld analysis were used for the chemical analysis. Electrochemical characterization was performed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and constant current/voltage tests focusing on the capacitive and electrocatalytic performance of the active materials.

Subject Keywords

Microwave-Assisted Synthesis; Metal Sulfides; Oxygen Evolution Reaction; Electrocatalysts

URI

https://hdl.handle.net/11511/98092

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Optimization of printed circuit board manufacturing: Integrated modeling and algorithms Altinkemer, K; Kazaz, B; Köksalan, Mustafa Murat; Moskowitz, H (2000-07-16) This paper focuses on an integrated optimization problem that is designed to improve productivity in printed circuit board (PCB) manufacturing. We examine the problems of allocating the components to feeders and sequencing the placement of these components on the PCBs, populated by a rotary head machine with surface mount technology. While previous research focuses on sequencing the placement and only considers this subproblem as part of an interrelated set of problems, we provide an integrated approach whi...
Computational Design and Analysis of Efficient Couplers for Nano-optical Links Altinoklu, A.; Ergül, Özgür Salih (2019-01-01) We present rigorous optimization and design of efficient couplers to improve optical transmission along nanowires. It is well-known that nanowires are excellent tools to transmit electromagnetic power in nano-optical systems, while couplers become inevitable at critical locations, particularly in input/output regions and at corners if nanowires are bended. We use genetic algorithms supported by fast full-wave solutions to efficiently and accurately obtain effective couplers in alternative scenarios. The des...
INVESTIGATION OF NEW ARCHITECTURAL FEATURES TO SUPPORT PERFORMANCE IMPROVEMENT IN EMBEDDED PROCESSORS Othman, Ahmad; Fahrioğlu, Murat; Yemişcioğlu, Gürtaç; Electrical and Electronics Engineering (2022-8) Recent advances in process automation, wireless sensor networks, and machine-to-machine (M2M) interfaces have caused embedded systems to be a blooming computing segment, with significant research focus on performance and energy efficiency. The embedded systems market witnessed enormous growth over the past decades and is foreknown to be boosted in the upcoming years. It has become harder to scale CMOS technologies compared to past and get performance and energy benefits through technology and circuits. Ther...
Prototype testing of a new passive energy dissipation device for seismic retrofit of bridges Shaban, Nefize; Caner, Alp (2016-09-29) © 2016 Shaban and Caner.The increasingly demanding performance requirements trigger the development of new devices to eliminate the limitations concerning the post-earthquake performance of available seismic protection systems. The prerequisite for economical earthquake-resistant bridges is the structures’ capacity to absorb and dissipate a large amount of seismic energy. A widely considered strategy for enhancing this capacity is through the use of passive energy dissipation systems for seismic protection ...
Design and Development of Data-Driven Screening Tools for Enhanced Oil Recovery Processes Yalgın, Gamze; Zarepakzad, Nida; Artun, Fazıl Emre; Durgut, İsmail; Kök, Mustafa Verşan (null; 2018-04-26) Computationally efficient screening and forecasting tools can offer faster decision-making and value- creation opportunities for enhanced oil recovery (EOR) operations without requiring a high-fidelity reservoir model. In this paper, we present a data-driven modeling approach utilizing numerical models and neural networks (ANN) to screen EOR methods in a rapid way. Numerical modeling is employed to generate the data for the training of the neural-network based data-driven model. It is aimed to develop compr...

Citation Formats

C. SAVAŞ UYGUR, “DEVELOPMENT AND CHARACTERIZATION OF SULFIDE BASED ACTIVE MATERIALS FOR ELECTROCHEMICAL APPLICATIONS,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.