Manipulating Zn 002 deposition plane with zirconium ion crosslinked hydrogel electrolyte toward dendrite free Zn metal anodes

Abstract

The practical applications of aqueous zinc (Zn) metal anodes are severely impeded by the side reaction and dendrite formations on Zn surface. Here, a silk fibroin-based hydrogel electrolyte, cross-linked by...

Toward Shuttle‐Free Zn–I2 Battery: Anchoring and Catalyzing Iodine Conversion by High‐Density P‐Doping Sites in Carbon Host

“…Such a result further suggests that the presence of I − may facilitate Zn 2+ plating/stripping kinetics. [19,20] In addition, in situ optical microscope observation also indicates that the presence of I − can regulate the morphology evolution of Zn. As shown in Figure S27a, Supporting Information, in the 2 m ZnSO 4 electrolyte, the Zn plating morphology becomes dendritic with increasing plating time; when LiI was introduced into the same electrolyte, the plated Zn presents a much smoother surface (Figure S27b, Supporting Information).…”

“…Figure S26a,b, Supporting Information, displays the electrochemical impedance spectrum (EIS) Nyquist plots obtained at different temperatures in Zn/Zn symmetric cells with or without the addition of LiI. The semi-circle of R in the lowfrequency range represents the interfacial resistance, [19,20] which is much lower for the battery with LiI. The relevant energy barrier was also calculated by fitting the interfacial resistance versus temperature using the Arrhenius equation (Figure S26c, Supporting Information).…”

“…The relevant energy barrier was also calculated by fitting the interfacial resistance versus temperature using the Arrhenius equation (Figure S26c, Supporting Information). [19,20] The barrier energy for the battery with LiI is 41.34 kJ mol −1 , while the one without LiI is 59.37 kJ mol −1 . Such a result further suggests that the presence of I − may facilitate Zn 2+ plating/stripping kinetics.…”

Advance in Electrolyte for Stable Zinc Anodes in Mild Aqueous Batteries

“…Cheng et al inhibited the side reaction on the surface of Zn by cross-linking high-priced Zr 4+ (SFPAMZr), and guided Zn to deposit nucleation along the (002) crystal plane. The low adsorption energy of Zr 4+ on Zn metal achieves a strong electrostatic shielding effect to resist the corrosion of water molecules and guides Zn deposition on the (002) plane to inhibit side reactions and dendrite formation …”

“…The low adsorption energy of Zr 4+ on Zn metal achieves a strong electrostatic shielding effect to resist the corrosion of water molecules and guides Zn deposition on the (002) plane to inhibit side reactions and dendrite formation. 50 3.3. Constructing In Situ SEI.…”