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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-479 |
| Subject |
FeOF Nanoparticles Wrapped in Graphitic Carbon Layers Derived from Fe-MIL-88B as a Cathode Material for Sodium-Ion Batteries |
| Authors |
Achmad Yanuar Maulana, SeonTae Kim, Jongsik Kim*
Department of Chemistry, Dong-A University, Korea
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| Abstract |
Lithium-ion batteries (LIBs) have been dominantly utilized as main energy storage systems for electric devices in recent decades. However, the limited resources of lithium and its availability in specific regions have increased its price, making LIBs difficult to be utilized in large-scale applications. Recently, sodium-ion batteries (SIBs) have been considered as a promising alternative due to the abundance, low-cost, and similar electrochemical properties of sodium with lithium. Iron oxyfluoride (FeOF) has been gaining attentions as one of most suitable cathode materials for SIBs due to high theoretical capacity (about 855 mA h g-1), low cost, and low toxicity. However, FeOF has often suffered from poor rate capability and cycling stability because of its low electrical conductivity and ion-diffusion kinetics. In this work, a novel synthetic route to prepare the FeOF nanoparticles wrapped with graphitic carbon layers (FeOF/GCL) was developed by using Fe-containing MOFs (Fe-MIL-88B). During the synthetic process, in-situ formed Fe(0) nanoparticles catalyzed the formation of graphitic carbon, and then it was transformed into FeOF through a simple hydrothermal reaction. The FeOF/GCL exhibited the excellent cycling stabilities, discharging the capacities of 467 mA h g-1 at the first cycle and 361 mA h g-1 even at the 100th cycle with a current density of 100 mA g-1 at 1.2-4.0 V. These values are significantly larger than those of bulk FeOF (about 189 and 21 mA h g-1 at the first and 100th cycles, respectively). |
| E-mail |
iyanmaulana@che.undip.ac.id |
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122nd General Meeting of the KCS