Recent Development of Aqueous Multivalent‐Ion Batteries Based on Conversion Chemistry

Abstract

Aqueous multivalent‐ion batteries (AMIBs) with features of environmental friendliness and cost‐efficiency are the most promising energy storage technologies for consumer electronics, electric vehicles, and grid‐scale energy storage. However, their practical application is severely impeded by the restricted capacity of electrode materials. Since chalcogen and halogen elements possess high specific capacities and low‐cost, the aqueous multivalent‐ion batteries based on chalcogen and halogen conversion are attractive due to the significant enhancement of specific energies. In this review, the advantages and recent progress of AMIBs based on chalcogen and halogen conversion chemistry have been systematically summarized with an emphasis on cell configuration, electrochemical performance, and storage mechanism. Furthermore, this review not only proposes challenges and perspectives for AMIBs, but also provides promising strategies for developing device‐scale applications. The above efforts may pave the way for the further development of high‐performance aqueous multivalent‐ion batteries with high safety and competitive performance.

A multifunctional protective layer filled with 2D anionic nanosheets enabling a dendrite-free zinc anode

“…1 Consequently, aqueous rechargeablemetal ion batteries have ushered in an opportunity for development, aiming to eradicate the safety problems caused by flammable organic electrolytes. 2,3 Among them, zinc metal has gained extensive attention due to its large reserves, non-toxicity, high theoretical specific capacity (820 mA h g −1 or 5855 mA h cm −3 ) and low redox potential (−0.762 V vs. SHE). 4,5 Nevertheless, the disordered deposition of zinc during battery charging/discharging can trigger the formation of zinc dendrites, which can pierce the separator of batteries and lead to internal short-circuit failure.…”

Insight into the Inflection Point of Surface Tension in Aqueous Solution of Imidazolium-Based Ionic Liquids

“…The distinctive variation patterns in surface tension arise from changes in the surface structure. − The SPG (Smoothed Particle Galerkin) method is frequently employed in experiments to investigate the interfacial structure of ILs and their aqueous solutions. Wang et al , conducted structural characterization of 1-alkyl-3-methylimidazolium tetrafluoroborate ILs using nuclear magnetic resonance (NMR) spectroscopy, infrared spectroscopy, mass spectrometry, and other techniques. The surface tension was determined in the temperature range of 293 to 338 K using the Wilhelmy platinum plate method.…”

Bidirectional manipulation of iodine redox kinetics in aqueous Fe–I2 electrochemistry

“…Albeit with appealing promise, the notorious shuttling of active iodine, the sluggish redox kinetics, and the high activation barrier of discharge products compromise the further development of Fe–I 2 electrochemistry. 15–17 Efforts have been devoted to addressing the issues initiated by iodine cathodes. One can utilize a porous carbon matrix for hosting active iodine and then physically suppress the dissolution of iodine species.…”