The poor stability of the zinc‐metal anode is a main bottleneck for practical application of aqueous zinc‐ion batteries. Herein, a series of molecular sieves with various channel sizes are investigated as an electrolyte host to regulate the ionic environment of Zn2+ on the surface of the zinc anode and to realize separator‐free batteries. Based on the ZSM‐5 molecular sieve, a solid–liquid mixed electrolyte membrane is constructed to uniformize the transport of zinc ions and foster dendrite‐free Zn deposition. Side reactions can also be suppressed through tailoring the solvation sheath and restraining the activity of water molecules in electrolyte. A V2O5||ZSM‐5||Zn full cell shows significantly enhanced performance compared to cells using glass fiber separator. Specifically, it exhibits a high specific capacity of 300 mAh g−1, and a capacity retention of 98.67% after 1000 cycles and 82.67% after 3000 cycles at 1 A g−1. It is attested that zeolites (ZSM‐5, H‐β, and Bate) with channel sizes of 5–7 Å result in best cycle stability. Given the low cost and recyclability of the ZSM and its potent function, this work may further lower the cost and boost the industrial application of AZIBs.

theoretical capacity (820 mA h g −1 and 5855 mA h cm −3 ) and low redox potential (−0.76 V vs standard hydrogen electrode). [1,2] However, the zinc anode in aqueous electrolytes suffers from such problems as dendrite growth, undesired side reactions, and huge volume expansion during Zn plating/stripping, due to uneven distribution of surface charge density on the anode and nonuniform ion flux in the electrolyte (Figure 1a). These uncontrolled phenomena not only reduce coulombic efficiency (CE), but also lead to a drastic drop in capacity and lifespan. Therefore, it is highly desirable to address these critical issues and develop highly stable and reversible Zn anodes.Recently, some studies have mainly focused on the anode surface modification and electrolyte optimization, including adding high concentrations of salt in an electrolyte, [3][4][5] various electrolyte additives, [6][7][8][9][10] and the design of diaphragm. [11,12] Since the electrode/electrolyte interface is the site of electrochemical reactions, its morphology, and physicochemical property play a pivotal role in determining all reaction types and rates on the interface under the fixed electric field. The interface engineering is critical for the stability of the Zn anode and the whole battery. [13] Therefore, constructing a 3D conductive host is considered an effective method, considering the enlarged effective specific surface area can reduce local current densities and suppress the formation of large dendrites. In addition, the abundant porous framework buffers the volume expansion caused by the plated protrusions. [14][15][16][17] However, it is worth noting that the increasing nucleation and deposition sites also provide more possibilities for the occurrence of hydrogen evolution and corrosion reactions, and even leads to the collapse of the 3D framework during long-term plating/ stripping (Figure 1b). Another kind of strategy is to form dense artificial protective layers such as CaCO 3 , [18] ZrO 2 , [19] MCM41, [20] ZIF-8, [21] and ZnS, [22] between the electrolyte and the electrode, which can isolate the direct contact between the electrolyte and the zinc anode, and effectively reduce the intrusion of side reactions. But these 2D coating layers couldn't accommodate volume expansion and thus hardly keep working in long-term performance. By constructing 3D-Zn@coating, it is expected to suppress the side reactions and dendrite formation and offer enough space for volume variation (Figure 1c).Herein, a 3D zinc conductive framework with a highly zincophilic ZnSe layer is introduced at the electrolyte/anode The development and application of rechargeable aqueous zinc-ion batteries are seriously hindered by the problems of corrosion and dendrite growth on Zn metal anodes. Herein, a polyporous 3D zinc framework coupled with a zincophilic ZnSe overlayer (3D-Zn@ZnSe) is synchronously obtained by one-step electrochemical scanning, which precisely repairs intrinsic defects of the Zn foil surface and remodels the electrolyte/anode interface. The 3D-Zn ho...

Zinc Metal Anodes In article number 2202683, Weixing Song, Chunyi Zhi, and co‐workers obtain a zincophilic and polyporous interface by one‐step potentiostatic scanning which helps inhibit dendrite growth and hydrogen evolution. The pre‐treatment realizes three functions: precisely targets and repairs surface defects on zinc foil, forms 3D polyporous framework by electro‐oxidation for the first time, and constructs the zincophilic interface by electro‐deposition.

Solar cells offer an environmentally sustainable and convenient option for power source of next‐generation wearable electronics. Due to the advantages of low cost, easy fabrication and deformation, fiber dye‐sensitized solar cells (FDSSCs) are required to be suitable for the available wearable electronics. Herein, through introduced nanopillar arrays over the Ti wire and atomic layer deposition of conformal TiO2 layer to make the photoanode, the energy conversion efficiency of the FDSSCs is improved by 45%. The FDSSCs are combined with planar microsupercapacitor (MSC) clusters to make self‐charging power system on a polymer sheet. The interdigital finger electrodes of MSC were obtained in a single‐step method by laser‐inducing on a polyimide film, and two series can be charged up to 1.8 V in 30 s by the FDSSCs under solar irradiation. This power sheet can be attached to various surfaces such as skin, cloths, and electronic devices for practical applications.