Encapsulated Fe3O4 nanoparticles with silica thin layer as an anode material for lithium secondary batteries

Title
Encapsulated Fe3O4 nanoparticles with silica thin layer as an anode material for lithium secondary batteries
Authors
박상은이상화양다니엘이중기
Keywords
Encapsulated; Fe3O4; silica; thin layer; anode
Issue Date
2010-05
Publisher
Physica scripta
Citation
VOL T139, 014027-1-014027-4
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/37735
ISSN
0031-8949
Appears in Collections:
KIST Publication > Article
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