Nitrogen-doped carbon fibers loaded with Co/Co2Mn3O8 alloy nanoparticles as bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries

Electrospinning-derived transition metal/carbon nanofiber composites as electrocatalysts for Zn-air batteries

“…Bimetallic oxides demonstrate heightened catalytic activity compared to their monometallic counterparts, primarily attributed to an increased concentration of active sites. 53 Notably, structures such as spinel (AB 2 O 4 ) and perovskite (ABO 3 ), commonly encountered in transition bimetallic oxides, are acknowledged for their exceptional catalytic efficiency. The mixed valence states accelerate electron transfer during the reaction, and their unique lattice structure contributes to a high concentration of oxygen vacancies.…”

Cobalt-containing ZIF-derived catalysts for Zn–air batteries

“…Ye et al designed catalysts (Co/Co 2 Mn 3 O 8 @NCFs) with a unique three-dimensional structure. 129 The Co/Co 2 Mn 3 O 8 @NCFs had a unique three-dimensional structure, coupled with the rich active sites brought by Co 2 Mn 3 O 8 and Co-N x , which would have good bifunctional catalytic activity. The study tested their ORR and OER performances, and the test results showed that their ORR half-wave potential was 0.826 V RHE , and their OER catalytic performance was also better than that of RuO 2 .…”

Self-Supporting Silicon-Based Hierarchical Carbon Nanofibers As Anodes for Lithium-Ion Batteries

“…Moreover, as anode materials for LIBs, Si-based CNFs not only retain the high conductivity of graphite materials but also possess the high theoretical specific capacity of Si materials. Therefore, they not only exhibit excellent reversible capacity but also demonstrate relatively good cycling performance, making them the preferred approach for achieving efficient LIBs. − By reasonably optimizing the parameters of Si-based CNFs such as the carbon crystal structure, Si grain size, pore size, and porosity, the capacity and reversibility of anode materials can be further improved . However, these Si-based CNFs obtained by blending electrospinning exhibit some granular and mushroom-like structures after multiple charging and discharging cycles of LIBs, which is due to the significant swelling and shrinkage of Si NPs after repeated Li + insertion/extraction .…”

“…21−23 By reasonably optimizing the parameters of Si-based CNFs such as the carbon crystal structure, Si grain size, pore size, and porosity, the capacity and reversibility of anode materials can be further improved. 24 However, these Si-based CNFs obtained by blending electrospinning exhibit some granular and mushroomlike structures after multiple charging and discharging cycles of LIBs, which is due to the significant swelling and shrinkage of Si NPs after repeated Li + insertion/extraction. 25 Moreover, the prolonged and repeated volume expansion of Si NPs will lead to instability of SEI films, ultimately resulting in poor cycling stability and the rate performance of these Si-based CNFs.…”