Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 22, Pages 9774-9779Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.08.005
Keywords
Silicon monoxide; SiO/CNF composite; Lithium-ion batteries; Cycle performance; Chemical structure
Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan
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The cyclic performance of a composite SiO and carbon nanofiber (CNF) anode was examined for lithium-ion batteries. SiO powder of several micrometers was pulverized using high energy mechanical milling. The SiO was ball-milled for 12h with CNF to produce a composite electrode material that exhibited excellent cycling performance. A reversible capacity of approximately 700 mAh g(-1) was observed after 200 cycles. The excellent cyclic performance was discussed with respect to the change of the valence state of Si by ball-milling. A large irreversible capacity at the first cycle for the SiO/CNF composite electrode was reduced to 2% by chemically pre-charging with a lithium film attached to the rim of the electrode. (C) 2011 Elsevier B.V. All rights reserved.
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