Frustules of the cultured diatom (CD) with unique porous architecture and high surface area were used as template for electrodes. Iron oxide coating on cultured diatom (CD-FeOx) was carried out via hydrolysis and metathesis reaction of FeCl3, which allowed the uniform coating of the FeOx onto frustules. The relatively large surface area of CD contributed to double-layer capacitance, while the FeOx provided pseudocapacitance. Results showed that 51% loading of FeOx on CD significantly enhanced performance to 70.2 F g−1, which was much higher compared with CD only. Supercapacitors remained functional after 1000 cycles and maintained 90% of the original performance. The CD-FeOx composite was also successfully used to fabricate flexible supercapacitor electrodes.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science (miscellaneous)
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology
- Iron oxides