Assessment and progress of polyanionic cathodes in aqueous sodium batteries. Issue 11 (21st October 2021)

• Record Type: Journal Article
• Authors: Zhang, Huang; Tan, Xiaoping; Li, Huihua; Passerini, Stefano; Huang, Wei
• Is Part Of: Energy & environmental science. Volume 14:Issue 11(2021)
• Page Start: 5788
• Page End: 5800
• Publication Date: 2021-10-21
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/d1ee01392k
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : An assessment of the latest ground-breaking advances of polyanionic materials as cathodes for aqueous sodium-ion batteries is given. Future research directions and challenges on material development are provided. Abstract : Aqueous sodium-ion batteries are expected to be competitive technologies for large-scale energy storage applications due to the extraordinary sodium abundance, low manufacturing cost and high safety. However, only a few materials have been reported for the positive electrode and there is an urgent need to develop new, practical host materials with satisfactory performance. Polyanionic compounds [ e.g., Na3 V2 (PO4 )3 ] have shown promising performance as positive electrode materials in non-aqueous electrolyte-based sodium-ion batteries, yet they possess limitations in aqueous systems. Herein we provide an assessment of the materials along with the latest ground-breaking advances of polyanion-type compounds as potential positive electrode materials for aqueous sodium-ion batteries. Particular emphasis is placed on the electrolyte regulation and cell design to address the compatibility issues from the technical and scientific point of view, which would make aqueous sodium batteries advantageous over non-aqueous systems. Lastly, we provide an outlook on the challenges and research directions to incorporate polyanionic compounds in the development of high energy aqueous batteries for grid-scale applications.