Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms

Document Type

Article

Publication Date

3-1-2019

Abstract

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.

Identifier

85057461226 (Scopus)

Publication Title

Materials Today Energy

External Full Text Location

https://doi.org/10.1016/j.mtener.2018.11.004

e-ISSN

24686069

First Page

166

Last Page

173

Volume

11

Fund Ref

U.S. Army

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