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Aqueous zinc (Zn) iodine (I 2) batteries have emerged as viable alternatives to conventional metal-ion batteries. However, undesirable Zn deposition and irreversible iodine conversion during cycling have impeded their progress.
In this study, the progresses of the zinc–iodine flow battery and zinc–iodine battery are described and the breakthrough achievements are highlighted. It is hoped that elemental iodine and even other halogens will become the mainstream as cathode materials for the zinc-based battery.
Here, to circumvent these issues, we use iodine as positive electrode active material in a battery system comprising a Zn metal negative electrode and a concentrated (e.g., 30 molal) ZnCl 2 aqueous electrolyte solution.
This mini review is anticipated to provide valuable guidance for the further development of the zinc–iodine battery. The zinc–iodine flow battery and zinc–iodine battery are cost-effective and environmentally friendly electrochemical energy storage devices. They deliver high energy density owing to the flexible multivalence changes of iodine.
Zinc-iodine batteries can be classified into zinc-iodine redox flow batteries (ZIRFBs) and static zinc-iodine batteries (SZIBs).
The zinc–iodine battery has the advantages of high energy density and low cost owing to the flexible multivalence changes of iodine and natural abundance of zinc resources. Compared with the flow battery, it has simpler components and more convenient installation, yet it still faces challenges in practical applications.
Figure 7e shows the use of MOF-derived catalysts for the positive electrode, which improve bromine utilisation and avoid diffusion effects, achieving a discharge voltage close to the theoretical value . Similarly, positive …
The zinc–iodine flow battery and zinc–iodine battery are cost-effective and environmentally friendly electrochemical energy storage devices. They deliver high energy …
Here, to circumvent these issues, we use iodine as positive electrode active material in a battery system comprising a Zn metal negative electrode and a concentrated …
The result shows that zinc accumulation has been successfully solved by balancing positive reactions and negative reactions with this novel electrode, and no zinc …
Here, iodine encapsulated by hierarchical porous carbon is employed as a positive material to assemble high-performance zinc–iodine batteries. Meanwhile, the …
Unlike batteries, supercapacitors (especially electric double-layer capacitors) absorb charge at the surface of the electrode material, and the ions in the electrolyte move …
Here, iodine encapsulated by hierarchical porous carbon is employed as a positive material to assemble high-performance zinc–iodine batteries. Meanwhile, the utilization of the ZnI 2 additive in the electrolyte can …
The whole system consists of a positive electrode, negative electrode, ion exchange membrane, two external pumps, and two electrolyte tanks. The electrolyte flows …
The high pore volume facilitated efficient iodine loading, while the hierarchical microporous structure prevented dissolution and the possible shuttle effect of polyiodide. …
Aqueous zinc (Zn) iodine (I2) batteries have emerged as viable alternatives to conventional metal-ion batteries. However, undesirable Zn deposition and irreversible iodine …
Impressively, trace iodine during the battery reaction can effectively suppress the formation of the zinc sulfate hydroxide by-product on the surface of the Zn anode, which is …
Nb 1.60 Ti 0.32 W 0.08 O 5−δ as negative electrode active material for durable and fast-charging all-solid-state Li-ion batteries
Iodine is widely used in aqueous zinc batteries (ZBs) due to its abundant resources, low cost, and active redox reactions. In addition to the active material in zinc-iodine batteries, iodine also …
Aqueous zinc (Zn) iodine (I2) batteries have emerged as viable alternatives to conventional metal-ion batteries. However, undesirable Zn deposition and irreversible iodine …
As shown in Fig. 1a, AZIBs are composed of zinc metal negative electrodes, mild neutral (or slightly acidic) electrolytes, and positive electrode materials that can accommodate …
Membrane: The membrane is responsible for separating the positive and negative electrodes and conducting charge carriers (Zn(H 2 O) 6 2+) to form an internal …
A battery separator is usually a porous membrane placed between the negative and positive electrodes to keep the electrodes apart to prevent electrical short circuits. 8 They …
During the discharge cycle of this type of battery, bromide ions are converted to bromine gas in the negative electrode (anode) and zinc ions are converted to zinc in the …
Iodine is also used to improve the efficiency and reversible reaction of conversion-type electrodes. In zinc-bismuth battery, the introduced iodide ions can effectively activate the Bi-O bond and …
Currently, energy storage systems are of great importance in daily life due to our dependence on portable electronic devices and hybrid electric vehicles. Among these energy storage systems, hybrid supercapacitor …
Iodine is also used to improve the efficiency and reversible reaction of conversion-type electrodes. In zinc-bismuth battery, the introduced iodide ions can effectively activate the Bi-O bond and …
This review summarizes the recent development of Zn─I 2 batteries with a focus on the electrochemistry of iodine conversion and the underlying working mechanism. Starting …
In this Review, we present the challenges and recent developments related to rechargeable ZIB research. Recent research trends and directions on electrode materials that …
In this Review, we present the challenges and recent developments related to rechargeable ZIB research. Recent research trends and directions on electrode materials that can store Zn 2+ and electrolytes that can …