Redox-coupled alkali-metal ion transport mechanism in binder-free films of Prussian blue nanoparticles

Abstract

Our experimental and theoretical studies elucidate the redox-coupled ion transport mechanism and the intrinsic structure–property relationship in binder-free Prussian-blue electrodes.

Effect of Particle Size and Anion Vacancy on Electrochemical Potassium Ion Insertion into Potassium Manganese Hexacyanoferrates

“…Here, we discuss the reason why the proper number of anion vacancies improves the electrochemical performance, especially the kinetics of K + ion insertion/extraction. The anion vacancy might affect the electronic conduction and ionic diffusion of the KMnHCFs as it changes the electronic state and pore sizes [10] . However, we confirmed almost the same electronic conductivity of L‐ and IE‐KMnHCFs, 8.71×10 −7 and 8.36×10 −7 S cm −1 , respectively, and a slightly higher electronic conductivity of 1.63×10 −6 S cm −1 for S‐KMnHCF.…”

“…Ishizaki et al. suggested that anion vacancies in Fe[Fe(CN) 6 ] y can promote the diffusion of K + ions using cyclic voltammetry data and site energy calculations based on density functional theory (DFT) [10] . They considered that the larger open pores formed in vacancy‐rich Fe[Fe(CN) 6 ] y enhance K + ion diffusion.…”

The uptake characteristics of Prussian-blue nanoparticles for rare metal ions for recycling of precious metals from nuclear and electronic wastes

“…Since MHCFs have a simple cubic lattice structure like a jungle gym (inset in Fig. 2 ), in which divalent (M 2+ ) and trivalent (M 3+ ) metal cations are cross-linked with each other via cyano-group anion (CN – ), and exhibit many fascinating features 9 – 11 , they have been extensively investigated from viewpoints of both scientific and industrial aspects 12 – 18 . Recently, PB (FeHCF) has been applied to remove radioactive cesium-134 ( 134 Cs) and 137 Cs elements from contaminated soils caused by Fukushima nuclear plant accident in 2011 19 – 23 , because PB has the jungle-gym cubic structure with a 0.5 nm-interstitial site (4 c site in space group) that plays a role in trapping Cs ions efficiently.…”

The uptake mechanism of palladium ions into Prussian-blue nanoparticles in a nitric acid solution toward application for the recycling of precious metals from electronic and nuclear wastes

“…1), wherein divalent (M 2+ ) and trivalent (M 3+ ) metal cations are cross-linked with each other via a cyano-group anion (CN À ) and exhibit numerous fascinating features, [10][11][12] they have been extensively investigated from the viewpoints of both scientic and industrial aspects. [13][14][15][16][17][18][19] Recently, PB (FeHCF) was applied for the removal of radioactive cesium-134 ( 134 Cs) and 137 Cs from contaminated soils, which was caused by the Fukushima nuclear plant accident in 2011 (ref. [20][21][22][23][24] because PB has the jungle-gym cubic structure (see Fig.…”