Progress of Phosphate‐based Polyanion Cathodes for Aqueous Rechargeable Zinc Batteries

Abstract

Figure 1. Schematic illustration of the ARZBs model structure and the typical cathode materials.

Iron-based fluorophosphate Na2FePO4F as a cathode for aqueous zinc-ion batteries

“…The electrochemical performance of these materials can be improved using electrolyte engineering with additives or high-concentration salts, structural design modifications, and doping strategy. 30 While the capacity and rate kinetics are limited for iron fluorophosphate, this study shows that Fe-based phosphoanionic cathodes can be implemented in aqueous zinc-ion batteries.…”

Flexible Quasi‐Solid‐State Aqueous Zinc‐Ion Batteries: Design Principles, Functionalization Strategies, and Applications

“…[ 21 ] However, low redox potential and the dissolution of vanadium‐based compound still restrict the application of vanadium‐based compound in AZIBs. Besides, the polyanionic compounds [ 22 ] and Prussian blue analogs (PBAs) [ 23 ] also can be selected as cathode active materials for AZIBs with the energy storage mechanisms of Zn 2+ insertion/extraction chemistry. Even though these materials can generate high potential during the Zn 2+ insertion/extraction, the limited anchors and space for Zn 2+ of these materials lead to the low specific capacity.…”

“…[21] However, low redox potential and the dissolution of vanadium-based compound still restrict the application of vanadium-based compound in AZIBs. Besides, the polyanionic compounds [22] and Prussian blue analogs (PBAs) [23] also can be selected as cathode active materials Reproduced with permission, [21] Copyright 2017, Wiley-VCH. b) Illustration of the conversion reaction.…”

Utilization of 2D materials in aqueous zinc ion batteries for safe energy storage devices

“…Most commonly, graphene is not used as an active cathode material but is rather used to improve the structural properties of the cathode material or to improve the inferior performance of various reported cathode candidates (e.g., MnO 2 , vanadiumbased compounds, Prussian blue analogues, and polyanion compounds). 47,[237][238][239] The use of the 2D layered graphene structure to enhance the performance of the conventional cathode material such as V 2 O 5 has been demonstrated by Wang et al who synthesized an ultra-thin amorphous V 2 O 5 -graphene (A-V 2 O 5 /G) heterostructure using a homogenous VOC 2 O 4 precursor and single layer graphene oxide as a template to form a sandwich like 2D lamellar structures via a simple hydrothermal method. 47 As shown in Fig.…”