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Published on: March 7, 2018
Spatially confined FeF3 cathodes in N-doped carbon nanotubes for lithium storage
Jun Li1,2,3, Xifei Li1,2,3,4, Mengyao Li1,2,3
1Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Institute of Advanced Electrochemical Energy and School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China. xfli2011@hotmail.com.
Abstract:
Herein, a N-doped carbon nanotube encapsulated FeF3 nanoparticle (FeF3@N-CNTs) composite was developed via in situ pyrolysis and gas-phase fluorination strategies. The 3D carbon constrained scaffold enhances conversion reaction kinetics and effectively suppresses significant volume changes in the FeF3 cathode during cycling. Consequently, FeF3@N-CNTs exhibits excellent rate capability and maintains a high discharge capacity of 110.6 mA h g-1 after 5000 cycles at 2 A g-1. It is believed that this study presents an innovative strategy for the development of long-cycling conversion-type cathode materials.
