Prussian blue and its analogues as advanced supercapacitor electrodes

Goda, Emad S.; Lee, Seungho; Sohail, Muhammad; Yoon, Kuk Ro

doi:10.1016/j.jechem.2020.03.031

Cited by 138 publications

(34 citation statements)

References 123 publications

(112 reference statements)

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“…When replacing iron ions with other metals such as

, a family called Prussian blue analogs is created [ 14 ]. Due to the physical and chemical properties of Prussian blue, the study of this material and its analogs has increasingly attracted the attention of the scientific-technological community due to its promising applications in electrochemical sensing, electrochromic devices, batteries, supercapacitors, and magnetic/ photomagnetic systems [ 15 , 16 , 17 , 18 , 19 ]. The growth of PB films has been successfully shown by electrodeposition [ 20 ], liquid phase epitaxy [ 21 ], and spin coating [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Resistive Switching in Electrodeposited Prussian Blue Layers

et al. 2020

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Prussian blue (PB) layers were electrodeposited for the fabrication of Au/PB/Ag stacks to study the resistive switching effect. The PB layers were characterized by different techniques to prove the homogeneity, composition, and structure. Electrical measurements confirmed the bipolar switching behavior with at least 3 orders of magnitude in current and the effect persisting for the 200 cycles tested. The low resistance state follows the ohmic conduction with an activation energy of 0.2 eV.

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“…When replacing iron ions with other metals such as

Section: Introductionmentioning

confidence: 99%

Resistive Switching in Electrodeposited Prussian Blue Layers

et al. 2020

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“…Prussian Blue (PB), which was first discovered as robust blue‐colored pigment in the year 1706, represents a coordination compound formed by combining mixed‐valent iron ions with cyanide anions, while monovalent metal ions (e.g., K + ) are inserted into the voids of the crystal lattice [1] . At present, PB and PB analogues (PBA) have been extensively studied and shown potential applications as oxygen evolution reaction (OER) catalysts, [2] electrode materials, [3] supercapacitors, [4] and gas adsorbents [5] . As shown in Figure 1, PB built from Fe II ‐C≡N‐Fe III sequences has a regular pore size of 3.2 Å, making them superb candidates for size‐based molecular sieving.…”

Section: Figurementioning

confidence: 99%

Layered Double Hydroxide‐Assisted Fabrication of Prussian Blue Membranes for Precise Molecular Sieving

Zhang

Liu

et al. 2021

Angewandte Chemie

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Prussian Blue (PB), which was first discovered as robust blue‐colored pigment in the year 1706, has shown promising prospects in disease treatment, energy conversion, water splitting, and sensing. Relying on the uniform 3.2 Å‐sized pore channels as well as high stability in aqueous environments, in this study, we pioneered in situ preparation of polycrystalline PB membranes to justify their dye rejection and metal ion discrimination ability in aqueous environments. Among various factors, the introduction of calcined NiFe layered double hydroxide buffer layers on porous α‐Al2O3 substrates was found to play a paramount role in the formation of continuous polycrystalline PB membranes, thereby leading to excellent dye rejection efficiency (>99.0 %). Moreover, prepared PB membranes enabled discriminating different monovalent metal ions (e.g., Li+, Na+, and K+) depending on their discrepancy in Stokes diameters, showing great promise for lithium extraction from smaller‐sized metal ions.

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“…Owing to the high structural tunability, good electronic properties, and fast ionic conduction, MOFs are considered as one of the most promising candidates for developing high-performance pseudocapacitors 1 . The pseudocapacitive behaviors of both PB and PB analogues involve hybrid ion storage mechanism [30][31][32][33] . Despite the well-studied mechanisms, the depth of the surface charging layer remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Determining the depth of surface charging layer of single Prussian blue nanoparticles with pseudocapacitive behaviors

Wang¹,

Niu²,

Jiang³

et al. 2021

Preprint

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Based on the dependence of the light scattering intensity of single Prussian blue nanoparticles (PBNPs) on their oxidation state during sinusoidal potential modulation at varying frequencies, we present an electro-optical microscopic imaging approach to optically acquire the Faradaic electrochemical impedance spectroscopy (oEIS) of single PBNPs. Frequency analysis revealed typical pseudocapacitive behavior with hybrid charge-storage mechanisms depending on the modulation frequency. In the low-frequency range (0.04–1 Hz), the optical amplitude was inversely proportional to the square root of the modulation frequency (i.e., ∆I ∝ f− 0.5; diffusion-limited process), while in the high-frequency range (1.25–100 Hz), it was inversely proportional to the modulation frequency (∆I ∝ f− 1; surface charging process). The contribution of each process was, therefore, determined and quantified using oEIS at the single-nanoparticle level. Because the geometry of single cuboid-shaped PBNPs can be precisely determined by scanning electron microscopy and atomic force microscopy, oEIS of single PBNPs allowed the determination of the depth of the surface charging layer, revealing it to be ~ 2 unit cells regardless of the nanoparticle size.

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Prussian blue and its analogues as advanced supercapacitor electrodes

Cited by 138 publications

References 123 publications

Resistive Switching in Electrodeposited Prussian Blue Layers

Resistive Switching in Electrodeposited Prussian Blue Layers

Layered Double Hydroxide‐Assisted Fabrication of Prussian Blue Membranes for Precise Molecular Sieving

Determining the depth of surface charging layer of single Prussian blue nanoparticles with pseudocapacitive behaviors

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