I want to know about the capacity retention of my sample what procedure/technique should be follow so that i can get the graph between capacity retention vs number of cycles using CHI660d workstation.
Thank you in advance
Hello Muhammad Sajjad ,
I am not familiar with the CHI660d workstation. However, my suggestion would be to perform galvanostatic (current controlled) charge-discharge cycles as this tends to be a far more robust method than using the CVs. Supplementary characterisation by CV can however be useful; especially if the system shows asymmetry).
You may wish to either simply select the applied charge/discharge current (e.g., 100 mA) or a select a current to provide a simple value for the current as a function of the mass (e.g., 0.1 A.g-1).
You would expect that the capacitance would slowly diminish as you continue to cycle the device. Using the first cycle as your baseline, you then assess the retention at different cycle numbers (e.g., 25,50,100,500,1000).
I attach some articles that I hope you find informative.
- Investigations Of Electrochemical Double Layer Materials - A Comparison Of Test Methods
- Considerations For Consistent Characterisation Of Electrochemical Double-Layer Capacitor Performance
- Best Practice Methods For Determining An Electrode Material's Performance For Ultracapacitors
- A Guideline For Reporting Performance Metrics With Electrochemical Capacitors - From Electrode Materials To Full Devices
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