Encapsulated Fe3O4 nanoparticles with silica thin layer as an anode material for lithium secondary batteries
- Encapsulated Fe3O4 nanoparticles with silica thin layer as an anode material for lithium secondary batteries
- 박상은; 이상화; 양다니엘; 이중기
- Encapsulated; Fe3O4; silica; thin layer; anode
- Issue Date
- Physica scripta
- VOL T139, 014027-1-014027-4
- Fe3O4 nanoparticles were coated with a SiO2 layer by using a modified sol–gel method. The
synthetic procedures for Fe3O4 nanoparticles encapsulated with a SiO2 layer (SiO2@Fe3O4)
consist of three consecutive steps: (i) fabrication of Fe3O4 by the co-precipitation method,
(ii) stabilization of Fe3O4 with citrate as a capping agent, which is used to prevent particles
from aggregating, and (iii) silica encapsulation by a modified sol–gel reaction. Based on the
experimental range, SiO2@Fe3O4 exhibited higher cyclic performance than the intrinsic one.
The reversible capacity of Fe3O4 with SiO2 at the first cycle was 363 mA h g−1 and the
remaining discharge capacity was 321 mA h g−1 after the 30th cycle.
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