Nonepitaxial Electrodeposition of (002)‐Textured Zn Anode on Textureless Substrates for Dendrite‐Free and Hydrogen Evolution‐Suppressed Zn Batteries

• DOI: 10.1002/adma.202300073
• Publication Date: 2023-03-02T10:17:01Z
• Authors: Jingmin Zhang; Weiwei Huang; Longwei Li; Caiyun Chang; Kai Yang; Lei Gao; Xiong Pu
• Keywords: Overpotential; Dendrite (mathematics); Plating (geology); Texture (cosmology); Deposition

Nontoxic and safe aqueous Zn batteries are largely restricted by the detrimental dendrite growth hydrogen evolution of metal anode. The (002)-textured electrodeposition, demonstrated as an effective approach for solving these issues, is nevertheless achieved mainly epitaxial or hetero-epitaxial deposition on pre-textured substrates. Herein, electrodeposition compact textureless substrates (commercial Zn, Cu, Ti foils) at a medium-high galvanostatic current density reported. According to systematic investigations nucleation behaviors, this ascribed two reasons: i) promoted nonepitaxial fine horizontal (002) nuclei increased overpotential ii) competitive advantages (002)-orientated nuclei. resulting freestanding film exhibits significantly suppressed prolonged plating-stripping cycling life, achieving over 2100 mAh cm-2 cumulative capacity under 10 mA high depth discharge (DOD) 45.5%. Therefore, study provides both fundamental practical insights into long-life batteries.