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Owing to the extremely limited structural deformation caused by the introduction of guest ions that their rigid structure can sustain, crystalline materials typically fail owing to structural collapse when utilized as electrode materials. Amorphous materials, conversely, are more resistant to volume expansion during dynamic ion transport and can introduce a lot of defects as active sites. Here, The...
The zinc dendrite growth generally relies upon a “positive‐feedback” mode, where the fast‐grown tips receive higher current densities and ion fluxes. In this study, a self‐limiting polyacrylamide (PAM) hydrogel that presents negative feedback to dendrite growth is developed. The monomers are purposefully polymerized at the dendrite tips, then the hydrogel reduces the local current density and ion...
The high activity of water molecules results in a series of awful parasitic reaction, which seriously impede the development of aqueous zinc batteries. Herein, a new gel electrolyte with multiple molecular anchors is designed by employing natural biomaterials from chitosan and chlorophyll derivative. The gel electrolyte firmly anchors water molecules by ternary hydrogen bonding to reduce the activity...
Manganese oxide is a promising cathode material for aqueous zinc batteries. However, its weak structural stability, low electrical conductivity, and sluggish reaction kinetics lead to rapid capacity fading. Herein, a crystal engineering strategy is proposed to construct a novel MnO2 cathode material. Both experimental results and theoretical calculations demonstrate that Al‐doping plays a crucial...
Aqueous rechargeable zinc‐ion batteries (ZIBs) have attracted burgeoning interests owing to the prospect in large‐scale and safe energy storage application. Although manganese oxides are one of the typical cathodes of ZIBs, their practical usage is still hindered by poor service life and rate performance. Here, a MnO2–carbon hybrid framework is reported, which is obtained in a reaction between the...
Layered vanadium oxides have great potential as cathode materials for recently surged aqueous zinc‐ion batteries (AZIBs). However, achieving high energy/power densities simultaneously is challenging, and side reactions related to more frequently than disclosed Zn2+/proton co‐insertion mechanism aggravate stability concerns. Herein, an engineered binder‐free cathode configuration based on water‐processable...
Vanadium‐based derivatives, featuring affordable cost and high theoretical capacity, have gathered widespread interest in the context of aqueous zinc‐ion batteries (ZIBs). However, the further application of vanadium‐based materials is hindered by the limited electrical conductivity and cycling lifespan. Herein, 1D chain‐like structure vanadyl ethylene glycolate (VEG, (VO(CH2O)2)), growing on the...
In situ electrochemical activation brings unexpected electrochemical performance improvements to electrode materials, but the mechanism behind it still needs further study. Herein, an electrochemically in situ defect induction in close‐packed lattice plane of vanadium nitride oxide (VNxOy) in aqueous zinc‐ion battery is reported. It is verified by theoretical calculation and experiment that the original...
Aqueous zinc‐ion batteries (AZIBs) are regarded as one of the most promising alternative technology to lithium‐ion batteries on account of their low flammability and cost‐benefits. Among various cathode materials in AZIBs, environment‐friendly and sustainable organic electrode materials stand out owing to their structural diversity and tunability. However, their limited rate capability and cycle stability...
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