A novel hydrophobic-zincophilic bifunctional layer for stable Zn metal anodes

Atomic Sn sites on nitrogen-doped carbon as a zincophilic and hydrophobic protection layer for stable Zn anodes

“…Accordingly, the construction of a zincophilichydrophobic layer is ideal for both Zn deposition and side reaction inhibition. 48,49 Contact angle measurement is performed to test the hydrophobicity/hydrophilicity of the samples. The initial contact angle between Sn NC/Zn and 2 M ZnSO 4 electrolyte under ambient environment is 133°, while NC/Zn and Zn exhibit smaller angles of 59°and 113°, respectively (Fig.…”

Biomass-based Hierarchical Porous ORR and OER Bifunctional Catalysts with Strong Stability for Zn-Air Batteries

“…The high-resolution N 1s peaks of Co/N-HPCs-800 (Figure d) can be deconvolved into pyridinic-N (398.7 eV), graphitic-N (403.5 eV), pyrrolic-N (401.1 eV), and Co-N (399.8 eV). Pyridinic-N has been shown to have excellent charge transfer capabilities and is capable of inducing changes in the electronic structure of adjacent carbon atoms, thereby promoting oxygen adsorption by providing more Lewis base sites and lowering the energy barrier. − It is important to note that the catalytic activity of heteroatomic doped carbon to ORR can be effectively adjusted by manipulating the redistribution of electrons on adjacent carbon atoms. , Compared to the C 1s XPS peaks of Co/N-CNTs and Co-HPCs (Figure e), the peak position of Co/N-HPCs-800 shows a slight negative shift, indicating that electrons are transferred from C atoms to N atoms and thus enhances the density of electrons around C atoms at the Co/N-HPCs-800 interface. As shown in Figure S6, the O 1s high-resolution spectra of Co-HPCs, Co/N-CNTs, and Co/N-HPCs-800 can deconvolve three peaks, corresponding to C–O–C peaks, CO, and Co–O peaks.…”

Dendrite-Free and Highly Stable Zn Metal Anode with BaTiO3/P(VDF-TrFE) Coating

“…), , is a more direct method to prevent direct reactions between the Zn electrode and aqueous electrolyte to restrain Zn dendrite growth and side effects. In particular, inorganic dielectric coatings like TiO 2 , ZrO 2 , BaTiO 3 , and Nb 2 O 5 have demonstrated unique advantages in terms of modifying the Zn electrodeposition and generating space–charge polarization under an external electric field. − The external electric field can orientate the distribution of dipole moments, thereby regulating the ion distribution on the surface of the Zn anode. , However, these inorganic coatings have little effect on inhibiting side reactions because their poor hydrophobic properties are often unable to prevent reactions between the electrode and electrolyte . Hydrophobic layers have been shown to be effective in preventing side reactions because the hydrophobic interface can prevent free water molecules from reaching metal surfaces .…”

“…27,28 However, these inorganic coatings have little effect on inhibiting side reactions because their poor hydrophobic properties are often unable to prevent reactions between the electrode and electrolyte. 29 reaching metal surfaces. 30 In addition, as a protective layer, the hydrophobic organic layer should exhibit excellent zinc-ion diffusion kinetics.…”