Electrode - Electrolyte Interfaces

Module number: EI78023

Duration: 1 Semester

Recurrence: Winter semester

Language: English

Number of ECTS: 6

Staff

Professor in charge: Bernhard Wolfrum

Description of achievement and assessment methods

Laborleistung: Active participation in the lab course, preparation of colloquia In the discussions before the experiments, students will demonstrate their preparation and understanding of the theoretical background of the experiments (10%). During the experiments, the extent to which the students are able to apply the methods they acquired in theory and the practical performance in the lab will be evaluated (30%). In their written reports, the students demonstrate their ability to describe, interpret, and discuss experiments and results of the lab course and whether they are able to translate it to other problems (30%). In the seminar part of the class, students will prove their ability to transfer and expand theoretical concepts from the field of the lab course to detailed aspects of said field (30%) by the means of a presentation

(Recommended) requirements

not specified

Contents

The aim of this course is to introduce students to the theory of the electrode-electrolyte interfaces and their application in characterizing different materials for energy devices. The course is highly interactive and will begin with a discussion session encompassing basic electrochemical concepts and surface characterization. Students will become familiar with using a potentiostat for the investigation of electrochemical cells, starting with standard electrode materials and moving on to novel materials. The discussion will include the basic principles of electrodeelectrolyte interfaces for different materials and will give students a theoretical background in electrochemical and optical characterization techniques. Students will then move on to experimentation. The laboratory segment of this course will offer students hands-on experience in techniques such as electrode modification, electrochemical cleaning, galvanization, characterization and data evaluation. The work in the laboratory will allow them to experience the state-of-the-art measurement techniques that researchers employ in the fields of surface science and electrochemistry (e.g. contact angle device, laser interferometer, and potentiostat). After this experimental phase, students will devote some time to data evaluation and analysis. A tutor will assist the students in creating a data analysis plan that will allow for quantitative evaluation and accurate interpretation of results. Subsequent to the data analysis, each student will produce their own report. This report will be written in proper research paper format, enabling students to familiarize themselves with the requirements of scientific papers of a high enough standard to be published. At the end of the course, each student will give an oral presentation. Each presentation will be scheduled for one hour, consisting of 25 minutes of presentation, 20 minutes of open discussion, and 15 minutes of private feedback.

These seminars will help to improve the students' presentation and scientific discussion skills. The seminar is designed so that students will learn how to share knowledge with other scientists and students, how to develop scientific communication skills, how to present scientific research findings, and how to offer effective visualizations of data in presentations. Course topics: • Introduction of electrochemical concepts: electrochemical cell, mass transfer, electrode potentials, electrodes materials, electrolyte solution. • Surface modification (e.g. galvanization, electrochemical etching) • Metal deposition and dissolution • Amperometry • Impedance spectroscopy • Fit impedance data to equivalent circuits • Cyclic voltammetry • Microelectrodes • Surface characterization (metrology) and 3D profilometer • Data presentation • Lab reportThese seminars will help to improve the students' presentation and scientific discussion skills. The seminar is designed so that students will learn how to share knowledge with other scientists and students, how to develop scientific communication skills, how to present scientific research findings, and how to offer effective visualizations of data in presentations. Course topics: • Introduction of electrochemical concepts: electrochemical cell, mass transfer, electrode potentials, electrodes materials, electrolyte solution. • Surface modification (e.g. galvanization, electrochemical etching) • Metal deposition and dissolution • Amperometry • Impedance spectroscopy • Fit impedance data to equivalent circuits • Cyclic voltammetry • Microelectrodes • Surface characterization (metrology) and 3D profilometer • Data presentation • Lab report

Study goals

After participation in this course, the student is able to...

1. …understand core concepts in electrochemical charge transfer

2. …model the electrode-electrolyte interface

3. …characterize the electrode-electrolyte interface

4. …perform amperometric experiments

5. …carry out cyclic voltammetry experiments

6. …measure film thickness, roughness, homogeneity

7. …evaluate and analyze impedance data

8. …properly report experiments, results, and perform data analysis.

9. …develop an ability to troubleshoot experiments, critical thinking and collaborative problem-solving

10. …present scientific work to a multidisciplinary audience.

Teaching and learning methods

This module will be made up of a lab course (3 SWS) and a block of seminar presentations (2 SWS). The practical course will equip students with the tools to carry out electrochemical experiments and surface characterization. During the seminar block, the students will give an oral presentation reporting on advanced aspects of electrodeelectrolyte interfaces. Students will, therefore, require a deeper understanding of the topics through applying them in a research environment, and, in combination with their seminar presentations, they will be able to achieve the teaching goals that have been listed above.

Media formats

- Students carry out experiments at different setups on our labs - Projector & Whiteboard - Manuscripts for the lab experiments

Literature

Allen J. Bard, Larry Faulkner, "Electrochemical Methods", Wiley, 2nd Edition, 2000