Self-Assembled Homogeneous Heterobimetallic-Oxide Interfaces Enable Synergistic Hydrogen Evolution Passivation for Durable Acidic Zn-Mn Batteries.

Acidic Zn-Mn batteries hold promising prospects in large-scale energy storage owing to their higher discharge voltage and capacity. However, the challenge of developing long-term acidic Zn-Mn batteries still remains due to Zn anode instability in acidic media arising from the inevitable proton corrosion and hydrogen evolution reaction (HER). Herein, we report self-assembled homogeneous heterobimetallic-oxide interfaces on the Zn anode surface via a multi-cation (Cu, In, and Sn) synergistic regulation strategy to achieve >85.

Rational Design of a Bilayer Interface for Long-Term Stability of Zn Anodes and MnO Cathodes.

Understanding the composition-characteristics-performance relationship of the electrolyte-electric double layer-electrode-electrolyte interface (EEI) is crucial to construct stable EEIs for high-performance aqueous Zn-MnO batteries (AZMBs). However, the interaction mechanisms in AZMBs remain unclear. This work introduces sodium thioctate (ST) into ZnSO electrolyte to construct a stable bilayer EEI on both Zn and MnO electrodes.

High-Entropy Aqueous Electrolyte Induced Formation of Water-Poor Zn Solvation Structures and Gradient Solid-Electrolyte Interphase for Long-Life Zn-Metal Anodes.

Electrolyte engineering has emerged as an effective strategy for stabilizing Zn-metal anodes. However, a single solute or solvent additive is far from sufficient to meet the requirements for electrolyte cycling stability. Here, we report a new-type high-entropy electrolyte composed of equal molar amounts of Zn(OTf) and LiOTf, along with equal volumes of HO, triethyl phosphate, and dimethyl sulfoxide, which enhances electrolyte stability by increasing solvation entropy.

Building microcracked structure fibrous cathode coated by Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) for ultra-stable fiber-shaped aqueous zinc ions batteries.

Attributing to the advantages of intrinsic safety, high energy density, and good omnidirectional flexibility, fiber-shaped aqueous zinc ions batteries (FAZIBs), serving as energy supply devices, have multitude applications in flexible and wearable electronic devices. However, the detachment of active materials caused by bending stress generated during flexing process limits their practical application severely. To address the above issue, an effective integrated strategy employing microcracked activated cobalt hydroxide [A-Co(OH)] cathode with protective coating of poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOT:PSS) was proposed in this work to enhance the cyclic and bending performances of FAZIBs.

In Situ Self-Reconfiguration Induced Multifunctional Triple-Gradient Artificial Interfacial Layer toward Long-Life Zn-Metal Anodes.

Aqueous Zn-ion batteries featuring with intrinsic safety and low cost are highly desirable for large-scale energy storage, but the unstable Zn-metal anode resulting from uncontrollable dendrite growth and grievous hydrogen evolution reaction (HER) shortens their cycle life. Herein, a feasible in situ self-reconfiguration strategy is developed to generate triple-gradient poly(diallyldimethylammonium) bis(trifluoromethanesulfonyl)imide (PDDA-TFSI)-Zn(OH)Cl·HO-Sn (PT-ZHC-Sn) artificial layer. The resulting triple-gradient interface consists of the spherical top layer PT with cation confinement and HO inhibition, the dense intermediate layer ZHC nanosheet with Zn conduction and electron shielding, and the bottom layer Znophilic Sn metal.

High-Fluidity/High-Strength Dual-Layer Gel Electrolytes Enable Ultra-Flexible and Dendrite-Free Fiber-Shaped Aqueous Zinc Metal Battery.

Fiber-shaped aqueous zinc-ion batteries (FAZIBs) with intrinsic safety, highcapacity, and superb omnidirectional flexibility hold promise for wearable energy-supply devices. However, the interfacial separation of fiber-shaped electrodes and electrolytes caused by Zinc (Zn) stripping process and severe Zn dendrites occurring at the folded area under bending condition seriously restricts FAZIBs' practical application. Here, an advanced confinement encapsulation strategy is originally reported to construct dual-layer gel electrolyte consisting of high-fluidity polyvinyl alcohol-Zn acetate inner layer and high-strength Zn alginate outer layer for fiber-shaped Zn anode.