Mesoporous perforated Co3O4 nanoparticles with a thin carbon layer for high performance Li-ion battery anodes. (20th February 2018)

• Record Type: Journal Article
• Authors: Park, Ji Sun; Shin, Dong Ok; Lee, Churl Seung; Lee, Young-Gi; Kim, Ju Young; Kim, Kwang Man; Shin, Kwonwoo
• Is Part Of: Electrochimica acta. Volume 264(2018)
• Page Start: 376
• Page End: 385
• Publication Date: 2018-02-20
• Subjects: Lithium-ion batteries -- Anode -- Co3O4 -- Mesoporosity -- Perforated nanoparticle -- Carbon nanotube; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.01.092
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A facile method for preparing mesoporous perforated Co3 O4 nanoparticles with hollow channels and a thin carbon layer was newly designed and achieved with sacrificial carbon nanotube (CNT) templates. The threaded Co3 O4 nanoparticles on the CNTs were fabricated through a hybridization process, and a subsequent calcination process produced mesoporous perforated Co3 O4 nanoparticles. With a finely tuned calcination, CNTs were sacrificed to generate hollow channels in the Co3 O4 nanoparticles and to provide a carbon source for the formation of a few nm-thick carbon layer on the surface of the Co3 O4 nanoparticles simultaneously. The prepared mesoporous perforated Co3 O4 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 −1 after 100 cycles; 595.9 mA h g −1 @ 5 C rate) were successfully achieved in the anode application of a lithium-ion battery.