Electrospun TiO₂/V₃S₄/Carbon Nanotube Composite Nanofibers as Anodes for Lithium-Ion Batteries with Enhanced Cycling Performance

Abstract

Vanadium sulfide is considered one of the candidates for negative electrode materials in lithium-ion batteries (LIBs). Due to its unique layered structure and high theoretical capacity, it has received great attention from researchers. However, the cyclic life and rate performance caused by large volume changes are not ideal, which hinders its commercial application. Here, electrospun TiO 2 /V 3 S 4 /carbon nanotube (CNT) composite nanofibers were synthesized as anodes and showed excellent lithium storage properties. Adding carbon nanotubes can improve the overall conductivity and mechanical properties of the electrode materials. The carbon matrix doped with N and S provides more defects and active sites, which can further improve the conductivity and lithium storage capacity of the material. At a current density of 0.1 A g −1 , the specific capacity of TiO 2 /V 3 S 4 /CNT was still 718.1 mA h g −1 after 100 cycles, and the capacity retention rate was 92.96% after removing the irreversible reaction of the first cycle. Long cycle testing was conducted at a current density of 1 A g −1 , and after 700 cycles, there was still 712.2 mA h g −1 .

Trends in carbon nanotube research and development: A landscape view of emerging applications and materials

“…Composites are used in many products on both large and small scales; their ubiquity and the useful characteristics of CNT in them can account for their large fraction in CNT applications. Some of the applications for CNT in composites include their use in batteries, 62,63 in biocompatible hydrogels for heart cell growth, 64 for use with a glycidyl polyketone to form nonconductive layers, 65 to increase strength and wear resistance in composites with high-density polyethylene, 66 to absorb high-frequency electromagnetic waves (CN117042427A 67 ), and as components in heatresistant aerogels (CN114275770 68 ). One caveat with the analysis of composites is that the term "composite" can refer to both a direct use of CNTs for their physical properties (i.e.…”

Review of Carbon Nanotube Research and Development: Materials and Emerging Applications

“…Composites are used in many products on both large and small scales; their ubiquity and the useful characteristics of CNTs in them can account for their large fraction in CNT applications. Some of the applications for CNTs in composites include their use in batteries, , in biocompatible hydrogels for heart cell growth, for use with a glycidyl polyketone to form nonconductive layers, to increase strength and wear resistance in composites with high-density polyethylene, to absorb high-frequency electromagnetic waves (CN117042427A), and as components in heat-resistant aerogels (CN114275770). One caveat with the analysis of composites is that the term “composite” can refer to both a direct use of CNTs for their physical properties (i.e., structural composites where CNTs are incorporated into a matrix to provide mechanical strength, or electrical or thermal conductivity) and a more general structure type in which CNTs are combined with other components (such as their use as catalyst supports); classification as a composite thus may not exclude the use of CNTs in other applications.…”