Details

Autor(en) / Beteiligte

• Tung, Doan T.
• Tam, Le T. T.
• Dung, Hoang T.
• Dung, Ngo T.
• Ha, Hoang T.
• Dung, Nguyen T.
• Hoang, Thai
• Lam, Tran D.
• Thu, Tran V.
• Chien, Dang T.
• Hong, Phan N.
• Minh, Phan N.
• Quynh, Nguyen V.
• Lu, Le T.

Titel

Direct Ink Writing of Graphene–Cobalt Ferrite Hybrid Nanomaterial for Supercapacitor Electrodes

Ist Teil von

• Journal of electronic materials, 2020-08, Vol.49 (8), p.4671-4679

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This work presents an approach for using direct writing of graphene–cobalt ferrite (GP-CoFe) as a hybrid electrode material in supercapacitors. First, the hybrid ink was prepared from an aqueous colloid of sodium dodecyl sulfate-functionalized graphene and cobalt ferrite nanoparticles. Second, the ink was printed on graphite paper substrates by using direct ink writing; then, the electrodes were treated in a microwave for different durations. As-printed electrodes were characterized by scanning electron microscopy; transmission electron microscopy, and serval electrochemical techniques, such as open-circuit voltage measurement, cyclic voltammetry, and electrochemical impedance spectroscopy. Finally, the GP-CoFe electrodes after microwave treatment for 60 min exhibited the highest specific capacitance of 304 F/g at a charge/discharge current density of 0.83 A/g, and good electrochemical durability with 94.68% capacitance retention after 16,000 cycles. This work thus provides an efficient method to fabricate a high-performance supercapacitor electrode. Graphic Abstract