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학술지 Mesoporous Perforated Co3O4 Nanoparticles with a Thin Carbon Layer for High Performance Li-ion Battery Anodes
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저자
박지선, 신동옥, 이철승, 이영기, 김주영, 김광만, 신권우
발행일
201802
출처
Electrochimica Acta, v.264, pp.376-385
ISSN
0013-4686
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.electacta.2018.01.092
협약과제
17HB1900, 차세대 이동체용 형상/기능 제어 가능한 ICT 융합 소재/부품 미래원천기술, 이규성
초록
A facile method for preparing mesoporous perforated Co3O4 nanoparticles with hollow channels and a thin carbon layer was newly designed and achieved with sacrificial carbon nanotube (CNT) templates. The threaded Co3O4 nanoparticles on the CNTs were fabricated through a hybridization process, and a subsequent calcination process produced mesoporous perforated Co3O4 nanoparticles. With a finely tuned calcination, CNTs were sacrificed to generate hollow channels in the Co3O4 nanoparticles and to provide a carbon source for the formation of a few nm-thick carbon layer on the surface of the Co3O4 nanoparticles simultaneously. The prepared mesoporous perforated Co3O4 nanoparticles with a robust electronic conductive layer enabled not only an enhanced electrochemical reactivity from the greatly increased contact area between the electrolyte and electrode but also a high electronic conductivity of the overall electrode so that excellent electrochemical performances (1115.1 mA h g?닋1 after 100 cycles; 595.9 mA h g?닋1 @ 5 C rate) were successfully achieved in the anode application of a lithium-ion battery.
키워드
Anode, Carbon nanotube, Co O 3 4, Lithium-ion batteries, Mesoporosity, Perforated nanoparticle
KSP 제안 키워드
Calcination process, Carbon layer, Carbon nano-tube(CNT), Carbon source, Co O 3 4, Conductive layer, Contact area, Electrochemical performance, Electrochemical reactivity, Facile method, High performance