FeNi alloys encapsulated in N-doped CNTs-tangled porous carbon fibers as highly efficient and durable bifunctional oxygen electrocatalyst for rechargeable zinc-air battery

Recent Advances of CeO2‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

“…Experimental and computational research fruits have demonstrated that the binary and ternary alloys are very crucial type of electrocatalysts, being responsible for OER with high activity. [44,45] Nevertheless, they suffer from the strong degradation tendency under corrosive electrolyte and high potential during electrochemical measurement. Incorporating and protecting them on stable support, typically carbon materials, is a good solution.…”

N‐Doped Carbon Nanotubes Derived from Graphene Oxide with Embedment of FeCo Nanoparticles as Bifunctional Air Electrode for Rechargeable Liquid and Flexible All‐Solid‐State Zinc–Air Batteries

“…catalytic activities. Among various methods reported, confining alloy nanoparticles (NPs) into carbon nanotubes have been demonstrated as a judicious choice, [3] since such a structure is expectable to exhibit the following aspects of advantages: i) the alloy NPs deliver better activity than their individual components; ii) the encased alloy NPs sheathed by the carbon layer avoids the dissolution and erosion of metals by electrolyte and simultaneously prevents the aggregation of NPs; iii) the random stacking of the CNTs gives the high porosity to the catalyst, allowing its better accessibility to the catalytic reaction, and meanwhile, the sp 2 hydrized structure of the CNTs improves the electrical conductivity of the catalyst, allowing a fast charge transfer during the catalytic reactions; iv) the heterogeneous interfaces and strong coupling between the alloy NPs and carbon shell is helpful to drive a fast reaction kinetics.…”

“…For instance, Wang et al prepared FeNi alloy NPs embedded N-doped CNTs-tangled porous carbon fiber (FeNi/NCPCF) via the electrospinning and the subsequent annealing treatment. [3] Wu et al prepared FeNi NPs confined in N-doped carbon by integrating metal-organic framework (MOF) precursor with polymer coating/encapsulation strategy. [4] Gupta et al reported FeCoNi ternary metal-derived nitrogen-doped graphene tube catalyst (N-GT(FeCoNi).…”

Dual‐Active Sites Engineering of N‐Doped Hollow Carbon Nanocubes Confining Bimetal Alloys as Bifunctional Oxygen Electrocatalysts for Flexible Metal–Air Batteries

“…[1,2] Among them, flexible metal-air batteries have revealed their infinite potential and economic value in the energy systems due to their high theoretical energy density (1084 Wh kg −1 for Zn-air batteries and 2796 Wh kg −1 for Al-air batteries), low prices, good bending, as well as high security. [3][4][5] The energy efficiency of Zn-air batteries is always hindered by the multistep electron transfer process in both the oxygen reduction/evolution (ORR/OER) reactions. [6] Besides, the cathodic electrode of Al-air batteries primarily shoulders the mission from the ORR process.…”