A Prussian blue analogue as a long-life cathode for liquid-state and solid-state sodium-ion batteries

Abstract

A facile wet-chemical method for synthesizing a nano-sized NiFe-PBA compound with excellent electrochemical performance.

Self-Template Synthesis of Prussian Blue Analogue Hollow Polyhedrons as Superior Sodium Storage Cathodes

“…The molecular formula of the PBAs can generally be expressed as A x M [ M ′(CN) 6 ] y · z H 2 O ( x , y , z = stoichiometric numbers; A = alkaline metal; M and M ′ = transition metals; 0 ≤ x ≤ 2; 0 ≤ y ≤ 1). , Optimizing the performance of these materials has been an ongoing goal since they were first reported as cathodes for SIBs in 2012 . So far, various strategies, such as intrinsic structural optimization, micro/nanostructural preparation, and conductive compounding, have been proposed and good results have been achieved. − Previous studies have shown that intrinsic structural optimization, i.e., adjusting the chemical composition of the transition-metal ions (e.g., Ni, Cu, and Co) at the ends of CN groups in PBAs, is effective for improving electrochemical properties such as initial Coulombic efficiency and specific capacity. − However, Ni or Cu tends to be inserted and does not undergo redox reactions during charge and discharge processes, which means that they do not contribute to the capacity . On the contrary, Co is electrochemically active, and its corresponding PBAs can exhibit higher capacity, thus attracting more attention in practical applications.…”

Progress and Challenges for All‐Solid‐State Sodium Batteries

“…[ 126 ] Nevertheless, it suffers from a low practical capacity with fast capacity decay and a low coulombic efficiency with excessive water content, [ 127 ] with a conventional liquid electrolyte, that are too low for practical applications. [ 128 ] SEs would be a good choice to solve these problems by avoiding safety concerns and severe side reactions. For example, Du et al [ 129 ] developed a PFSA‐Na membrane SPE with excellent mechanical flexibility and high ionic conductivity.…”

Anchoring MoS2on an ethanol-etched Prussian blue analog for enhanced electrocatalytic efficiency for the oxygen evolution reaction

“…17,18 In recent years, metal-organic frameworks (MOFs) have drawn attention for their exceptional OER performance due to their large surface area, the possibility of tuning their porosity, and functionalization using different metals/ligands. 19,20 Among various MOFs, cyanide-based Prussian blue analogs (PBAs) have been extensively investigated for several applications like designing sustainable electrochemical catalysts, 21 supercapacitors, 22 metal-ion batteries, 23 sensors, 24 etc. However, pristine PBA cubes show insufficient OER activity due to the low conductivity, resulting in a high overpotential, 25 and hindrance of their OER electrocatalytic application.…”