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Applying a new Li ion diffusion measurement technique for Li ion battery materials
A very important task in Li ion battery technologies is the ability to charge a battery fast. A limiting parameter is the Li ion diffusion of the active particles. This projects aims to develop a method to calculate the diffusion coefficient of cathode materials based on the chemical delithiation.
Keywords: Lithium ion battery, Data analysis, Electrochemistry, Material Science, X-ray diffraction
With the emergence of electric vehicles, portable electronics, and renewable energy technologies in the recent years, metal ion batteries have become a very important tool to store energy. In up-to-date Li ion battery technologies, the limited charging speed of positive electrodes has become a bottleneck. Understanding which processes limit the charging speed can lead to new methods for optimizing the materials and their performance.
With the emergence of electric vehicles, portable electronics, and renewable energy technologies in the recent years, metal ion batteries have become a very important tool to store energy. In up-to-date Li ion battery technologies, the limited charging speed of positive electrodes has become a bottleneck. Understanding which processes limit the charging speed can lead to new methods for optimizing the materials and their performance.
In a recent semester project, we successfully developed a setup which is able to measure the voltage during the chemical delithiation as a function of time. Based on the setup, the goal is to develop a strategy to measure the maximal time a particle needs to be fully charged. In a second step, the results will be used to calculate the Li ion diffusion coefficient.
Your tasks:
• Perform multiple measurements and optimize the solid state chemistry setup.
• Develop a strategy to calculate the diffusion coefficient from given reaction time constants
• Perform standard material science analyses (XRD, SEM, …)
• Build electrochemical cells to validate the obtained diffusion coefficients.
Requirements
• Background in material science and or a related field
• Interest in electrochemical characterization methods
• Programming experience in Python, Matlab, or Labview is advantageous, but not a requirement
In a recent semester project, we successfully developed a setup which is able to measure the voltage during the chemical delithiation as a function of time. Based on the setup, the goal is to develop a strategy to measure the maximal time a particle needs to be fully charged. In a second step, the results will be used to calculate the Li ion diffusion coefficient.
Your tasks:
• Perform multiple measurements and optimize the solid state chemistry setup. • Develop a strategy to calculate the diffusion coefficient from given reaction time constants • Perform standard material science analyses (XRD, SEM, …) • Build electrochemical cells to validate the obtained diffusion coefficients. Requirements
• Background in material science and or a related field • Interest in electrochemical characterization methods • Programming experience in Python, Matlab, or Labview is advantageous, but not a requirement