A study of nanosize Fe3O4 deposited on carbon matrix.
Nanosized crystalline Fe3O4 (with an average particle size of 16 nm) was successfully synthesized on a carbon matrix surface. The prepared sample was heat-treated in the temperature range 300 degrees C - 750 degrees C to remove residual impurities and to obtain a final product with a 77:23 ratio between magnetite and the carbon support. The sample was subjected to physicochemical and electrochemical tests. The purity of the phase and the particles size was determined by X-ray diffraction analysis and confirmed by field emission scanning electron micrographs. The specific surface area of the sample measured by the B.E.T method was 120 m2 g(-1). A series of electrochemical tests including EIS, CV and long-term constant current cycling have been performed. The obtained reversible capacity within 15 cycles was in the range 400-550 mA h x g(-1). The electrochemical behavior of the test sample and its possible practical use as an anode material in lithium secondary batteries are discussed.
Banov
B
B
Institute of Electrochemistry and Energy Systems, BAS.
Ljutzkanov
L
L
Dimitrov
I
I
Trifonova
A
A
Vasilchina
H
H
Aleksandrova
A
A
Mochilov
A
A
Hang
Bui Thi
BT
Okada
Shigeto
S
Yamaki
Jun-ichi
J