Fe3O4 nanoparticles encapsulated in multi-walled carbon nanotubes possess superior lithium storage capability. (14th June 2017)

• Record Type: Journal Article
• Authors: Liu, Yuzhen; Wu, Nannan; Wang, Zhou; Cao, Huili; Liu, Jiurong
• Is Part Of: New journal of chemistry. Volume 41:Number 14(2017)
• Page Start: 6241
• Page End: 6250
• Publication Date: 2017-06-14
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj00230k
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Fe3 O4 nanoparticles are successfully introduced inside multi-walled carbon nanotubes (Fe3 O4 @MWNTs) by an innovative wet chemical injection method. Abstract : In this work, Fe3 O4 nanoparticles are successfully introduced inside multi-walled carbon nanotubes (Fe3 O4 @MWNTs) by an innovative wet chemical injection method. As anode materials for lithium-ion batteries, the Fe3 O4 @MWNTs deliver a superior long-term specific capacity of 703.7 mA h g −1 after 350 cycles at a current density of 100 mA g −1 . The high capacity of Fe3 O4 and the distinctive conductive network of cross-linked MWNTs are believed to boost the electrochemical capacity and rate capability. More importantly, the unique encapsulated structure is designed to efficiently cushion the strain induced by volume change during lithiation/delithiation processes. At the same time, size of the Fe3 O4 nanoparticles was controlled and they were prevented from agglomerating by the restriction effect of the nanoscaled tube. Both features ensure the structural integrity of the electrode and the stable performance in long-term cycling tests.