Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms

Emine S. Karaman; Zhiqian Wang; Giuseppe Di Benedetto; James L. Zunino; Xianyang Meng; Somenath Mitra

doi:10.1016/j.mtener.2018.11.004

Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms

Emine S. Karaman, Zhiqian Wang, Giuseppe Di Benedetto, James L. Zunino, Xianyang Meng, Somenath Mitra

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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-FeO_x) was carried out via hydrolysis and metathesis reaction of FeCl₃, which allowed the uniform coating of the FeO_x onto frustules. The relatively large surface area of CD contributed to double-layer capacitance, while the FeO_x provided pseudocapacitance. Results showed that 51% loading of FeO_x 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-FeO_x composite was also successfully used to fabricate flexible supercapacitor electrodes.

Original language	English (US)
Pages (from-to)	166-173
Number of pages	8
Journal	Materials Today Energy
Volume	11
DOIs	https://doi.org/10.1016/j.mtener.2018.11.004
State	Published - Mar 2019

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

Keywords

Algae
Diatom
Iron oxides
Supercapacitor

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10.1016/j.mtener.2018.11.004

Cite this

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title = "Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms",

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.",

keywords = "Algae, Diatom, Iron oxides, Supercapacitor",

author = "Karaman, {Emine S.} and Zhiqian Wang and {Di Benedetto}, Giuseppe and Zunino, {James L.} and Xianyang Meng and Somenath Mitra",

note = "Funding Information: The work was partially supported by a grant from U.S. Army . Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

month = mar,

doi = "10.1016/j.mtener.2018.11.004",

language = "English (US)",

volume = "11",

pages = "166--173",

journal = "Materials Today Energy",

issn = "2468-6069",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms

AU - Karaman, Emine S.

AU - Wang, Zhiqian

AU - Di Benedetto, Giuseppe

AU - Zunino, James L.

AU - Meng, Xianyang

AU - Mitra, Somenath

PY - 2019/3

Y1 - 2019/3

N2 - 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.

AB - 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.

KW - Algae

KW - Diatom

KW - Iron oxides

KW - Supercapacitor

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JO - Materials Today Energy

JF - Materials Today Energy

ER -

Fabrication of supercapacitors and flexible electrodes using biosilica from cultured diatoms

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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