Engineering of Polyanion Type Cathode Materials for Sodium-Ion Batteries : Toward Higher Energy/Power Density

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Article number2000473
Journal / PublicationAdvanced Functional Materials
Volume30
Issue number28
Online published29 Apr 2020
Publication statusPublished - 9 Jul 2020

Abstract

The development of high energy/power density sodium-ion batteries (SIBs) is still challenged by the high redox potential of Na/Na+ and large radius of Na+ ions, thus requiring extensive further improvement to, in particular, enhance the capacity and voltage of cathode materials. Among the various types of cathodes, the polyanion cathodes have emerged as the most pragmatic option due to their outstanding thermostability, unique inductive effect, and flexible structures. In this Review, a critical overview of the design principles and engineering strategies of polyanion cathodes that could have a pivotal role in developing high energy/power density SIBs are presented. Specifically, the engineering of polyanion cathode materials for higher voltage and specific capacity to increase energy density is discussed. The way in which morphology control, architectural design, and electrode processing have been developed to increase power density for SIBs is also analyzed. Finally, the remaining challenges and the future research direction of this field are presented.

Research Area(s)

  • cathodes, design principles, performance, polyanions, sodium-ion batteries, HIGH-PERFORMANCE CATHODE, CARBON-COATED NA3V2(PO4)(3), NA2COP2O7 PYROPHOSPHATE CATHODE, POSITIVE ELECTRODE MATERIAL, HIGH-RATE CAPABILITY, LIFE-SPAN CATHODE, NA-ION, LONG-LIFE, HIGH-POWER, MOISTURE SENSITIVITY