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Electrodeposition of porous graphene networks on nickel foams as supercapacitor electrodes with high capacitance and remarkable cyclic stability.

Yang S, Deng B, Ge R, Zhang L, Wang H, Zhang Z, Zhu W, Wang G - Nanoscale Res Lett (2014)

Bottom Line: The electrodeposition process was accomplished by electrochemical reduction of graphene oxide (GO) in its aqueous suspension.The resultant binder-free PG/NF electrodes exhibited excellent double-layer capacitive performance with a high rate capability and a high specific capacitance of 183.2 mF cm(-2) at the current density of 1 mA cm(-2).Moreover, the specific capacitance maintains nearly 100% over 10,000 charge-discharge cycles, demonstrating a remarkable cyclic stability of these porous supercapacitor electrodes. 82.47.Uv (Electrochemical capacitors); 82.45.Fk (Electrodes electrochemistry); 81.05.Rm (Fabrication of porous materials).

View Article: PubMed Central - PubMed

Affiliation: Hefei National Laboratory for Physical Sciences at Microscale, and Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China, shorlin@mail.ustc.edu.cn.

ABSTRACT

Unlabelled: We describe a facile, low-cost, and green method to fabricate porous graphene networks/nickel foam (PG/NF) electrodes by electrochemical deposition of graphene sheets on nickel foams (NFs) for the application of supercapacitor electrodes. The electrodeposition process was accomplished by electrochemical reduction of graphene oxide (GO) in its aqueous suspension. The resultant binder-free PG/NF electrodes exhibited excellent double-layer capacitive performance with a high rate capability and a high specific capacitance of 183.2 mF cm(-2) at the current density of 1 mA cm(-2). Moreover, the specific capacitance maintains nearly 100% over 10,000 charge-discharge cycles, demonstrating a remarkable cyclic stability of these porous supercapacitor electrodes.

Pacs: 82.47.Uv (Electrochemical capacitors); 82.45.Fk (Electrodes electrochemistry); 81.05.Rm (Fabrication of porous materials).

No MeSH data available.


Characterization of GO and PG/NF. (A) Photograph of a piece of PG/NF, in which the graphene sheet coated part is in black color. (B) Raman spectra of GO and PG/NF. (C, D) C 1 s XPS spectra for (C) GO and (D) PG/NF. (E) XRD patterns of GO and PG/NF.
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Fig1: Characterization of GO and PG/NF. (A) Photograph of a piece of PG/NF, in which the graphene sheet coated part is in black color. (B) Raman spectra of GO and PG/NF. (C, D) C 1 s XPS spectra for (C) GO and (D) PG/NF. (E) XRD patterns of GO and PG/NF.

Mentions: The fabrication process of PG/NF electrodes was accomplished by electrochemical route without involvement of high temperature, toxic reactants and additional transfer process, representing a quick, green, low-cost, and easily controllable approach to fabricating graphene-based supercapacitor electrodes. As shown in Figure 1A, the optical photograph of the as-prepared PG/NF clearly shows that black graphene materials were coated on the NF.Figure 1


Electrodeposition of porous graphene networks on nickel foams as supercapacitor electrodes with high capacitance and remarkable cyclic stability.

Yang S, Deng B, Ge R, Zhang L, Wang H, Zhang Z, Zhu W, Wang G - Nanoscale Res Lett (2014)

Characterization of GO and PG/NF. (A) Photograph of a piece of PG/NF, in which the graphene sheet coated part is in black color. (B) Raman spectra of GO and PG/NF. (C, D) C 1 s XPS spectra for (C) GO and (D) PG/NF. (E) XRD patterns of GO and PG/NF.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493843&req=5

Fig1: Characterization of GO and PG/NF. (A) Photograph of a piece of PG/NF, in which the graphene sheet coated part is in black color. (B) Raman spectra of GO and PG/NF. (C, D) C 1 s XPS spectra for (C) GO and (D) PG/NF. (E) XRD patterns of GO and PG/NF.
Mentions: The fabrication process of PG/NF electrodes was accomplished by electrochemical route without involvement of high temperature, toxic reactants and additional transfer process, representing a quick, green, low-cost, and easily controllable approach to fabricating graphene-based supercapacitor electrodes. As shown in Figure 1A, the optical photograph of the as-prepared PG/NF clearly shows that black graphene materials were coated on the NF.Figure 1

Bottom Line: The electrodeposition process was accomplished by electrochemical reduction of graphene oxide (GO) in its aqueous suspension.The resultant binder-free PG/NF electrodes exhibited excellent double-layer capacitive performance with a high rate capability and a high specific capacitance of 183.2 mF cm(-2) at the current density of 1 mA cm(-2).Moreover, the specific capacitance maintains nearly 100% over 10,000 charge-discharge cycles, demonstrating a remarkable cyclic stability of these porous supercapacitor electrodes. 82.47.Uv (Electrochemical capacitors); 82.45.Fk (Electrodes electrochemistry); 81.05.Rm (Fabrication of porous materials).

View Article: PubMed Central - PubMed

Affiliation: Hefei National Laboratory for Physical Sciences at Microscale, and Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China, shorlin@mail.ustc.edu.cn.

ABSTRACT

Unlabelled: We describe a facile, low-cost, and green method to fabricate porous graphene networks/nickel foam (PG/NF) electrodes by electrochemical deposition of graphene sheets on nickel foams (NFs) for the application of supercapacitor electrodes. The electrodeposition process was accomplished by electrochemical reduction of graphene oxide (GO) in its aqueous suspension. The resultant binder-free PG/NF electrodes exhibited excellent double-layer capacitive performance with a high rate capability and a high specific capacitance of 183.2 mF cm(-2) at the current density of 1 mA cm(-2). Moreover, the specific capacitance maintains nearly 100% over 10,000 charge-discharge cycles, demonstrating a remarkable cyclic stability of these porous supercapacitor electrodes.

Pacs: 82.47.Uv (Electrochemical capacitors); 82.45.Fk (Electrodes electrochemistry); 81.05.Rm (Fabrication of porous materials).

No MeSH data available.