Fabrication and characterization of carbon-coated Li2FeSiO4 nanoparticles reinforced by carbon nanotubes as high performance cathode materials for lithium-ion batteries. (20th June 2015)

• Record Type: Journal Article
• Authors: Zhang, Zheng; Liu, Xingquan; Wang, Liping; Wu, Yue; Zhao, Hongyuan; Chen, Bing; Xiong, Weiqiang
• Is Part Of: Electrochimica acta. Volume 168(2015)
• Page Start: 8
• Page End: 15
• Publication Date: 2015-06-20
• Subjects: Lithium iron orthosilicate -- Lithium ion batteries -- Cathode materials -- Carbon nanotubes -- Chemical vapor deposition; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.04.002
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A novel composite consisted of carbon nanotubes (CNTs) and carbon-coated Li2 FeSiO4 nanoparticles (Li2 FeSiO4 /CNTs/C) has been successfully synthesized by using spray drying technology and carbon chemical vapor deposition method. The Li2 FeSiO4 nanoparticles are dispersed homogeneously in CNTs network and assembled as micro-sized porous spherical particles. Such special composite structure constructs an efficient Li + and electron channel, which significantly enhance the Li + diffusion coefficient and reduced the charge transfer resistance, hence may lead to exhibit high specific capacity and excellent rate performances. The Li2 FeSiO4 /CNTs/C composite exhibits both high initial discharge capacity and excellent cycling stability (189.2 mA h g −1 at 0.1 C and 71.6 mA h g −1 at 5 C). We believe that adding CNTs and using carbon chemical vapor deposition are effective ways to improve the electrochemical performance of Li2 FeSiO4 cathode material.