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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
ELEC.P-479 |
| Subject |
Preparation of highly porous fluorine-doped CoFe2O4/graphene sheet nanocomposites for hybrid supercapacitors |
| Authors |
Juhyung Choi, Yuanzhe Piao1,*
Seoul National University, Korea
1Graduate School of Convergence Science and Technol, Seoul National University, Korea
|
| Abstract |
A common approach to achieve enhanced performance of electrochemical energy device involves improving the charge transfer properties and optimizing the material structure. In this work, highly porous fluorine-doped CoFe2O4 sphere/graphene nanocomposites are prepared by one-pot facile hydrothermal method based on the Ostwald ripening mechanism. Incorporation of fluorine in CoFe2O4/Graphene improves charge transfer in the electrode material and ion diffusion by forming a porous structure that serves as an electrolyte reservoir during the redox reactions. The effect of the fluorine concentration on the nanostructural formation during the hydrothermal process is systemically studied. The fluorine-dopedCoFe2O4/Graphene composite exhibits a high specific capacity of 288 C g-1 (at a current density of 10 A g-1). A hybrid supercapacitor based on the FS-CoFe2O4/GS composite exhibits a high energy density of 28.4Wh kg-1 (at a power density of 0.9 kWkg-1) at 1.6 V and a high capacity retention of 90% after 20,000 cycles. |
| E-mail |
jh.official@snu.ac.kr |
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123rd General Meeting of the KCS