Impedance spectroscopy of KBr

Team members

Laphas Precmcharoen, Song Runlin, Gao Jia

Idea

This project aims to study the electrical properties of Potassium Bromide (KBr) using impedance spectroscopy.

Materials

1. Electrochemical Impedance Spectroscopy (EIS) System

2. KBr samples

3. Two-electrode system

4. Frequency generator

Procedure

1. Sample Preparation: Prepare the KBr samples for testing. This may involve grinding KBr into a fine powder and pressing it into a pellet.

2. Electrode Setup: Set up the two-electrode system. One electrode is placed on either side of the KBr sample.

3. Impedance Measurement: Connect the KBr sample to the EIS system. Apply a small perturbation signal, and measure the impedance over a range of frequencies.

4. Data Collection: Record the impedance data at each frequency.

5. Data Analysis: Analyze the collected data using appropriate software or mathematical models. This includes creating Nyquist or Bode plots to visualize the data and fitting the data to an equivalent circuit model.

Timeline and Milestone

Timeline

5/3	Learn how to do the Impedance spectrocopy and how to palletize samples
7/3	Palletize powdered KBr
12/3	Patelletize KBr into different thicknesses
14/3	Silver paint both sides of the pallets
19/3	1st attempt on the impedance spectroscopy across different temperatures
20/3	final attempt on the impedance spectroscopy across different temperature from 50C - 255C of the pallet with diameter 11.4 mm and thickness 2.61 mm
21/3	Do the impedance spectroscopy while applying bias DC voltage from 0V to 5V of the pallet with diameter 11.7 mm and thickness 3.54 mm and do the impedance spectroscopy on the pallets with different thicknesses
26/3	Fit the nyquist plot of the temperature data with a semi circle to get approximated resistance and capacitance
2/4	Discuss the result and fit the DC dependent data with semi circle
4/4	Analyze the data and discuss
9/4	Discuss the possible mechanism of phase transition and updating wiki page