Dynamic compensation of MnOOH to mitigate the irregular dissolution of MnO₂in rechargeable aqueous Zn/MnO₂batteries

Abstract

MnO2 is a promising cathode material for rechargeable aqueous zinc batteries due to its high theoretical capacity and low cost. However, MnO2 cathodes often suffer from capacity fade as a...

An anthraquinone-based covalent organic framework for highly reversible aqueous zinc-ion battery cathodes

“…41 The emerging FT-IR peaks of both COFs indicated the presence of the b-ketoenamine-linked framework. Then the local structure of TfDa-COF is further conrmed by the analysis of solid-state 13 C NMR spectroscopy (Fig. S1 †).…”

“…[1][2][3] On this basis, aqueous rechargeable zinc-ion batteries (ZIBs) are gradually emerging to become highly efficient and competitive energy storage systems based on their low redox potential (−0.76 V vs. SHE), intrinsic safety, resource richness, and high theoretical capacity (820 mA h g −1 ). [4][5][6] To further drive the advancement of aqueous ZIBs, appropriate cathode materials have been extensively explored and researched, [7][8][9] for instance, manganese-based oxides, [10][11][12][13] Prussian blue analogs, [14][15][16] vanadium-based compounds, [17][18][19][20] molybdenum-based oxides/suldes, 21 and organic compounds. 22 Among these, organic materials have triggered a research boom in aqueous ZIBs in terms of their lightweight, lower toxicity, and sustainability.…”

Design Strategy of High Stability Vertically Aligned RGO@V2O5 Heterostructure Cathodes for Flexible Quasi-Solid-State Aqueous Zinc-Ion Batteries

“…Rechargeable batteries have been widely used in the integration of renewable resources, power energy of electric vehicles and electronic equipment, and many other fields. − Currently, lithium-ion batteries and lead–acid batteries dominate the market due to their high energy density and well-established technology. However, limited lithium resources, safety concerns, and environmental issues have gradually hindered their ability to meet the evolving demands of society. , In recent years, significant advancements have been made in the development of cost-effective and high-safety water-based battery systems, including univalent water system Na + , K + batteries, bivalent water system Zn 2+ , Mg 2+ batteries, and a polyvalent water system Al 3+ battery. − Among them, aqueous zinc-ion batteries (AZIB) have attracted more and more attention due to the metal zinc anode with low Zn 2+ /Zn redox potential (−0.76 V vs SHE), a high theoretical capacitance of 5854 mAh cm –3 (820 mAh g –1 ), safety and resource richness, and other advantages. − However, a major problem with AZIB is developing cathode materials with high capacity and stability to match the zinc anode.…”

Architecting a High-Energy-Density Rocking-Chair Zinc-Ion Batteries via Carbon-Wrapped Vanadium Dioxide

“…Efficient energy conversion/storage technologies are urgently needed due to the increasing consumption of fossil fuel resources and growing energy request. − Although lithium-ion batteries (LIBs) have been widely used in recent years, the limited lithium reserves and high security risks stemming from the flammable electrolyte still hinder their further development. − Recently, aqueous zinc-ion batteries (ZIBs) have stood out because of the sufficient reserves and cost effectiveness of the zinc (Zn) resource, a highly safe water-based electrolyte with superior ionic conductivity. − So far, great efforts have been committed to explore high-performance ZIBs, and numerous materials including Mn-based oxides, , V-based compounds, − Prussian blue analogues, , organic compounds, and other metal compounds , have been verified as viable cathodes. Nevertheless, the zinc metal anode still faces the following bottlenecks in practical applications: (i) the ununiform zinc deposition causes dendrite formation, which reduces reaction kinetics and even leads to battery failure; (ii) the side reactions [hydrogen evolution reaction (HER), corrosion, etc.]…”