Subject Number : S-16-NM-0059
Support Type : 機器利用
Proposal Title (English) : A Study of Graphene Aligned in Magnetic Field for Supercapacitors
Username (English) : Youcheng Zhang
Affiliation (English) : University of Tsukuba

1. Summary
Supercapacitor bridges the gap between the capacitor and batteries. Graphene has large surface area and high electronic conductivity. Hence it has been an ideal candidate for the electrode material for supercapacitors. Graphene electrode can lead to high energy density and power density for the supercapacitors. Our way to synthesize graphene is by chemical method. Firstly, we oxidize the graphite to graphene oxide and we reduce the graphene oxide to graphene by hydrazine. There is big difference on the functional groups between graphite, graphene oxide and graphene. And we aim to obtain the graphene with fewer oxygen groups.

2. Experimental
We use the Fourier transform infrared spectroscopy to investigate the functional groups on our samples. Graphene oxide and graphene powders are investigated by FT-IR. Data curves are obtained and analyzed. Characteristic peaks of the different functional bonds are labelled.

3. Results and Discussion
Here is the data figure we obtained through FTIR:

GO means graphene oxide, and rGO means reduced graphene oxide, namely graphene for short. The characteristic peaks has been labelled in the figure. As we can see: graphene oxide has higher -OH, C=O and C-O bond peaks than rGO. rGO only has observable C=C bond and slight C=O bond peaks. The results show that from graphene oxide to graphene, most of the oxygen has been eliminated by chemical reduction.
Here is a schematic figure for this reduction process:

4. Others
Thanks Miss Jie Li for her training on FT-IR machine.

5. Publication/Presentation
N/A

6. Patent
N/A