Spatially confined FeF3 cathodes in N-doped carbon nanotubes for lithium storage

Jun Li; Xifei Li; Mengyao Li; Qinting Jiang; Junqian Liu; Ruixian Duan; Guiqiang Cao; Jingjing Wang; Wenbin Li

doi:10.1039/d4cc04960h

Spatially confined FeF₃ cathodes in N-doped carbon nanotubes for lithium storage

Chem Commun (Camb). 2024 Nov 19. doi: 10.1039/d4cc04960h. Online ahead of print.

Authors

Jun Li^{1

2

3}, Xifei Li^{1

2

3

4}, Mengyao Li^{1

2

3}, Qinting Jiang^{1

2

3}, Junqian Liu^{1

2

3}, Ruixian Duan^{1

2

3}, Guiqiang Cao^{1

2

3}, Jingjing Wang^{1

2

3}, Wenbin Li^{1

2

3}

Affiliations

¹ Shaanxi 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.
² Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Xi'an, Shaanxi, 710048, China.
³ Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China.
⁴ Guangdong Yuanneng Technologies Co Ltd, Foshan, Guangdong, 528223, China.

PMID: 39558880
DOI: 10.1039/d4cc04960h

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.