Electrospun three-dimensional cobalt decorated nitrogen doped carbon nanofibers network as freestanding electrode for lithium/sulfur batteries

Carbon nanofiber-based three-dimensional nanomaterials for energy and environmental applications

“…32 After the formation of 3D PNF scaffolds by electrospinning, it is possible to fabricate further 3D CNF nanostructures through some post-treatment methods such as the calcination and carbonization of as-produced PNFs. 33,34 For instance, in a typical case Zhang and co-workers demonstrated the fabrication of 3D porous CNFs network with high doping of N and B through an electrospinning and subsequent calcination process, as shown in Fig. 1a.…”

“…For instance, Yao and co-workers reported the electrospinning synthesis of a 3D CNF network decorated with metal Co, and its further applications for Li-S batteries. 33 In their study, the as-prepared 3D Co/N-CNFs network membrane was used as the positive current collector containing Li 2 S 6 for Li-S batteries, as shown in Fig. 8b.…”

Synergistic effect of titanium‐oxide integrated with graphitic nitride hybrid for enhanced electrochemical performance in lithium‐sulfur batteries

“…The cell with TOCN@S cathode delivers discharge capacities of 963, 907, 843, 804, 731, and 630 mAh g −1 at 0.1, 0.2, 0.3, 0.5, 1, and 2°C, respectively. And when the charge‐discharge rate is returned to 0.1°C, a reversible capacity of 953 mAh g −1 is recovered, showing the superior stability of TOCN@S. As schematic illustration of Figure 4E, the nitrogen groups of CN and polar structure TiO 2 could effectively suppress the dissolution of polysulfide and leading to restrain shuttle effect 35,47‐49 . In view of the synergy of advantages, TOCN exhibits superior electrochemical performance, especially ultra‐long cycling stability with high sulfur loading 50 .…”

“…And when the chargedischarge rate is returned to 0.1 C, a reversible capacity of 953 mAh g −1 is recovered, showing the superior stability of TOCN@S. As schematic illustration of Figure 4E, the nitrogen groups of CN and polar structure TiO 2 could effectively suppress the dissolution of polysulfide and leading to restrain shuttle effect. 35,[47][48][49] In view of the synergy of advantages, TOCN exhibits superior electrochemical performance, especially ultra-long cycling stability with high sulfur loading. 50 Moreover, as shown in Table 2, compared with other CN or various dimensional structures of TiO 2 to modify sulfur electrodes, the TOCN@S electrode has outstanding cycle life, which also illustrates the synergistic effect of chemisorption polysulfide by TOCN.…”

Nanosized Ti 4 O 7 supported on carbon nanotubes composite modified separator for enhanced electrochemical properties of lithium sulfur battery

“…Industrial monolayer separators including polypropylene (PP) and polyethylene (PE) are usually designed with enough macropores as lithium ions channels, while the polysulfides dissolved in electrolyte can pass through these pores without any difficulty and then have side reaction with lithium foil 17 . Conductive carbon layer coated on separator is considered as the simplest and most effective solution to decrease pore size of separator 18 . This concept was firstly put forward by Manthiram research group, in which the carbon coating layer can serve as a protective screen to prevent polysulfides moving to lithium anode and does not affect the normal transport of lithium ions 19 .…”