I prepared Ti3C2-MnO2 composite as electrode for supercapacitors. The sample gave some promising results but the CD profile is faradaic instead of the normal Ti3C2 and MnO2 EDLC behaviours. Attached is the CD profiles for Ti3C2 pristine, MnO2 pristine, and Ti3C2-MnO2 composite.
No, it's unusual. Both are pseudocapacitive materials and can experience redox reactions, but this response is very much battery-like. It may be caused the electrolyte, particle size of your MnO2 and other experimental parameters. Also, be sure that you didn't oxidize Ti3C2 and formed TiO2. Check our papers on capacitance of Ti3C2.
You can download my papers directly from my website: http://nano.materials.drexel.edu/publications/
Password for PDF files is: nmg
MnO2 can work as a positive electrode in Zn-MnO2 elements by the following reaction:
MnO2+H2O +1e = MnOOH+ OH-
for example - see link http://jes.ecsdl.org/content/113/9/870.short
No, it's unusual. Both are pseudocapacitive materials and can experience redox reactions, but this response is very much battery-like. It may be caused the electrolyte, particle size of your MnO2 and other experimental parameters. Also, be sure that you didn't oxidize Ti3C2 and formed TiO2. Check our papers on capacitance of Ti3C2.
You can download my papers directly from my website: http://nano.materials.drexel.edu/publications/
Password for PDF files is: nmg
The electrolyte is acid or alkaline? The Ti3C2 may be oxided in the preparation process.
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