Construction of Mixed Ionic‐Electronic Conducting Scaffolds in Zn Powder: A Scalable Route to Dendrite‐Free and Flexible Zn Anodes

Abstract

Zn powder (Zn‐P)‐based anodes are considered ideal candidates for Zn‐based batteries because they enable a positive synergistic integration of safety and energy density. However, Zn‐P‐based anodes still experience easy corrosion, uncontrolled dendrite growth, and poor mechanical strength, which restrict their further application. Herein, a mixed ionic‐electronic conducting scaffold is introduced into Zn‐P to successfully fabricate anti‐corrosive, flexible, and dendrite‐free Zn anodes using a scalable tape‐casting strategy. The as‐established scaffold is characterized by robust flexibility, facile scale‐up synthesis methodology, and exceptional anti‐corrosive characteristics, and it can effectively homogenize the Zn2+ flux during Zn plating/stripping, thus allowing stable Zn cycling. Benefiting from these comprehensive attributes, the as‐prepared Zn‐P‐based anode provides superior electrochemical performance, including long‐life cycling stability and high rate capability in practical coin and flexible pouch cells; thus, it holds great potential for developing advanced Zn‐ion batteries. The findings of this study provide insights for a promising scalable pathway to fabricate highly efficient and reliable Zn‐based anodes and will aid in the realization of advanced flexible energy‐storage devices.

Binder-Free Freestanding 3D Zn-Graphene Anode Induced from Commercial Zinc Powders and Graphene Oxide for Zinc Ion Battery with High Utilization Rate

“…36,37 Recently, Liang et al introduced a mixed ionic-electronic conducting scaffold in Zn powder to fabricate anticorrosive, and dendritefree Zn anode, with an ultralong cycle time over 1200 h at 0.25 mA cm −2 . 38 Li et al designed a Zn anode by hybridization of commercial Zn powders and pristine graphene, and achieved 360 h of cycle life at a current density of 5 mA cm −2 . 33 Herein, we proposed a freestanding 3D Zn-graphene (Zn_G) anode induced from commercial Zn powders and graphene oxide (GO) without any binder via simple and effective method.…”

“…First, the high contact area of zinc powders in aqueous electrolyte increases the risk of corrosion and deteriorates the intrinsic instability of metal zinc. The hydrogen evolution results in cell failure by increasing internal pressure and triggering seal failure of cells. ,, Moreover, some zinc particles will lose contact with the main skeleton leading to dead Zn formation during the cycling. , Recently, Liang et al introduced a mixed ionic-electronic conducting scaffold in Zn powder to fabricate anticorrosive, and dendrite-free Zn anode, with an ultralong cycle time over 1200 h at 0.25 mA cm –2 . Li et al designed a Zn anode by hybridization of commercial Zn powders and pristine graphene, and achieved 360 h of cycle life at a current density of 5 mA cm –2 …”

Steric Molecular Combing Effect Enables Ultrafast Self-Healing Electrolyte in Quasi-Solid-State Zinc-Ion Batteries

“…In contrast, the Zn||Zn symmetrical cell in the guar gum/ZnSO 4 /glycerol system shows a stable polarization overpotential of ∼50 mV and an ultralong life span of 1500 h, 4 times longer than that of the guar gum/ZnSO 4 system, which also confirms the superiority of the dynamic adaptive interface. When the applied current density and cycling capacity were increased to a high current density and large capacity of 10 mA cm –2 and 10 mAh cm –2 , respectively (Figure f and Figure S15), the Zn||Zn symmetrical cell in the guar gum/ZnSO 4 /glycerol system remains stable for 400 h. These values are superior to those of previously reported quasi-solid electrolytes and better than those obtained in most advanced Zn-based anodes and electrolytes, ,− reflecting the efficacy of the guar gum/ZnSO 4 /glycerol system in suppressing Zn dendrite growth.…”

Enhancing the Kinetics of Zinc Ion Deposition by Catalytic Ion in Polymer Electrolytes for Advanced Zn–MnO2 Batteries

“…[37,38] Moreover, the MWCNTs-OH with high electrical conductivity facilitate the uniform distribution of the electric field. [39][40][41] The [EMI-TFSI] IL ionic liquid serves to greatly increase the overall ionic conductivity of the GPEs. The PPCu x C-ZMIL y GPEs did not require dipping activation due to the introduction of MnSO 4 /Zn(OTf) 2 .…”