Nitrogen/sulfur dual-doped porous carbon nanofibers with Co9S8 nanoparticles encapsulated by graphitic shells: A highly active stable free-standing air electrode for rechargeable non-aqueous Li-O2 batteries and primary alkaline Al-air batteries

Electrospun Inorganic Nanofibers for Oxygen Electrocatalysis: Design, Fabrication, and Progress

“…[162,163] Co 9 S 8 nanoparticles encased by graphitic shells in situ grown on N,S dual-doped porous 3D ECNFs network (Co 9 S 8 @G/NS-PCNF) was fabricated. [164] Its ORR catalytic performance is comparable to that of a Pt/C, which is attributed to the synergistic effect between the graphitic shell-encapsulated Co 9 S 8 nanoparticles core and the NS-PCNF. As the free-standing Co 9 S 8 @G/NS-PCNF cathode in Al-air batteries, a high open circuit voltage of 1.74 V, a peak power density of 79.04 mW cm −2 , and a robust stability over 200 h were both realized, demonstrating their promising application.…”

Transition metal sulfides meet electrospinning: versatile synthesis, distinct properties and prospective applications

“…Metal-air batteries are another type of rechargeable batteries with an ultrahigh energy storage capability. [353][354][355] For example, Li-O 2 and Al-air batteries possess high theoretical energy densities of 11140 Wh kg -1 and 8135 Wh kg -1 , respectively, which are thirty and twenty times higher than LIBs. 353 In a typical example, Co 9 S 8 nanoparticles embedded graphitic layers decorating on N,S dual-doped porous CNFs (Co 9 S 8 @G/NS-PCNFs) have been prepared as a free-standing bifunctional electrodes for both Li-O 2 and Al-air batteries.…”

“…[353][354][355] For example, Li-O 2 and Al-air batteries possess high theoretical energy densities of 11140 Wh kg -1 and 8135 Wh kg -1 , respectively, which are thirty and twenty times higher than LIBs. 353 In a typical example, Co 9 S 8 nanoparticles embedded graphitic layers decorating on N,S dual-doped porous CNFs (Co 9 S 8 @G/NS-PCNFs) have been prepared as a free-standing bifunctional electrodes for both Li-O 2 and Al-air batteries. 353 In this hybrid system, the N,S dual-doped porous CNFs offer abundant active sites, enabling excellent electron and mass transport as well as electrolyte immersion.…”

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

“…The heteroatom doped carbon material usually has a higher conductivity and more active sites than the pristine material, thereby enhancing the electro conductive performance of the electrode materials when used as a coating layer. In particular, codoping with nitrogen and sulfide atoms can accelerate the Na + transport rate and generate larger sodium storage areas, thus inducing good cycling stability [125][126][127][128][129][130][131]. For example, nitrogen doping with pyridinic N and pyrrolic N, in particular, could boost the insertion/de-insertion ability of the sodium ion.…”