Thin layer films of copper hexacyanoferrate: Structure identification and analytical applications

Ventura, Michele Della; Mullaliu, Angelo; Ciurduc, Diana Elena; Zappoli, Sergio; Giuli, Gabriele; Tonti, Dino; Enciso, E.; Giorgetti, Marco

doi:10.1016/j.jelechem.2018.08.044

Cited by 9 publications

(4 citation statements)

References 52 publications

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“…Due to the lower reagent concentration, no spontaneous precipitation occurs in the solution. This process has the general advantage that the deposition can be site-directed to electrodes, enabling the coating of microstructures and electrodes of complicated shape or even three-dimensional architectures (Figure a). , A large variety of MHCMs have been electrodeposited on various electrode materials, among them is CuHCF on glassy carbon . Even epitaxial films have been obtained for FeHCFs on Au(110) single-crystal electrodes .…”

Section: Resultsmentioning

confidence: 99%

“…56,57 A large variety of MHCMs have been electrodeposited on various electrode materials, 12 among them is CuHCF on glassy carbon. 58 Even epitaxial films have been obtained for FeHCFs on Au(110) single-crystal electrodes. 59 However, contact mode SFM images in Figure 1b show that this procedure yields isolated deposits for CuHCF on Au.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Morphology and Conductivity of Copper Hexacyanoferrate Films

et al. 2020

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Films of conductive coordination network compounds are interesting as functional materials for charge storage, electrocatalysis, electrochromic switching, or conversion of light. The electrical conductivity depends on not only intrinsic material properties but also grain boundaries. Copper hexacyanoferrate shows a remarkable variation in film morphologies depending on the preparation route. Conductive films can only be obtained for continuous crystalline films that have been received by a combination of sonication-assisted casting and vapor-assisted conversion. Electrical conductivities of these films are higher than those of powder pellets with a similar crystal structure. Temperature-dependent and humidity-dependent measurements on powder pellets revealed the activation energies for charge transport. Thermogravimetric analysis, temperature-dependent X-ray diffraction data, and humidity-dependent measurements on powder pellets revealed the activation energies for charge transport and the role of proton conductivity.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Morphology and Conductivity of Copper Hexacyanoferrate Films

et al. 2020

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“…The lattice is characterized by zeolitic channels of roughly 3.2 Å, beyond cavities of around 5 Å arising from vacancies, allowing a facile (de)insertion of ions with little lattice strain. These structural features, together with the electroactivity of the constituting metals, form the basis for a vast range of applications, for instance, analyte sensors [13,14], magnetic devices [15], electrochromism [16], charge storage [17], supercapacitors [18,19], ion-exchange sieves [20,21], and even antibacterial agents against Escherichia coli and Staphylococcus aureus [22].…”

Section: Introductionmentioning

confidence: 99%

Operando XAFS and XRD Study of a Prussian Blue Analogue Cathode Material: Iron Hexacyanocobaltate

et al. 2018

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The reversible electrochemical lithiation of potassium iron hexacyanocobaltate (FeCo) was studied by operando X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) assisted by chemometric techniques. In this way, it was possible to follow the system dynamics and retrieve structural and electronic transformations along cycling at both Fe and Co sites. These analyses confirmed that FeCo features iron as the main electroactive site. Even though the release of potassium ions causes a local disorder around the iron site, the material exhibits an excellent structural stability during the alkali ion deinsertion/insertion processes. An independent but interrelated analysis approach offers a good strategy for data treatment and provides a time-resolved picture of the studied system.

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“…电致变色材料颜色可随外加电场变化而变化, 可用于新型显示器件 [1][2][3][4][5] 。许多研究者对彩色电致变色器件(Multicolor electrochromic devices, MCECDs) 进行了研究, 但仍有一些问题没有解决。目前彩色电致变色器件多使用具有不同取代基的有机材料 [6][7][8][9][10] , 制备出颜色丰富的材料体系, 但材料及器件的制备都较为复杂 [11][12][13][14] 。本课题组曾经报道了一种彩色普鲁士蓝类似物复合电致变色(MC-PBA)薄膜, 该薄膜具有红、蓝、绿、黄四种典型颜色状态 [15] 。仅以氧化铟锡(ITO)玻璃为对电极制备了简单的电致变色器件(I-MCECD), 性能相对不足。因此, 制备高性能的离子存储层替代 ITO 玻璃对提升 MCECD 的性能十分必要。锌铁普鲁士蓝类似物(Zn-Fe PBA)颜色为白色且几乎不随外加电压变化而变化 [16][17][18][19] 。一般而言, 使用 Zn-Fe PBA 作为 ECDs 的离子存储层, 可以使电化学性能显著提高 [20][21][22] , 同时不会对 ECD 的色彩产生影响 [23] 。前期研究获得了具有彩色电致变色性能的 MC-PBA 薄膜 [15] , Zn-Fe PBA 可作为对电极直接与其组装成相应的电致变色器件(Z-MCECD)。目前, Zn-Fe PBA 薄膜多是通过旋涂法制备, 存在制备流程复杂、薄膜循环稳定性差等问题。本工作采用两步电沉积法制备的白色 Zn-Fe PBA 薄膜 [24] 由六边形 Zn-Fe PBA 纳米片堆叠而成, 在电化学氧化还原过程中几乎不发生颜色变化, 且具有良好的循环稳定性。以 Zn-Fe PBA 薄膜为对电极制备了相应的电致变色器件(Z-MCECD), 器件的性能得到了显著提高, 可以同时具有红、蓝、绿、黄四种典型的颜色状态。该 Z-MCECD 在彩色电致变色显示领域具有较好应用前景。…”

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Zn-Fe PBA Films by Two-step Electrodeposition Method: Preparation and Performance in Electrochromic Devices

Zhang¹,

Zou²,

WANG³

et al. 2022

Journal of Inorganic Materials

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Electrochromic materials can be used in new display devices because of their color-changing properties with applied voltage. The current multicolor electrochromic devices (MCECDs) are mostly prepared using several organic materials of different colors, and their process is relatively complicated, leaving preparation of simple MCECDs is still a challenge. In order to simplify the preparation process, we proposed a Prussian blue analogue 962composite electrochromic (MC PBA) film with four typical color states of red, blue, green, and yellow for excellent performance ECD. In this work, the preparation of a Zn-Fe Prussian blue analogue composite (Zn-Fe PBA) film was proposed by a two-step electrodeposition method. It has only one pair of redox peaks in the cyclic voltammetry curve, which corresponds to the redox reaction between FeⅢ /Fe Ⅱ . The electrochemical performance of the Zn-Fe PBA film is excellent, which hardly degrades after 10000 cycles. It is white with almost no color change during electrochemical redox, and does not affect the color when assembling multicolor electrochromic device (Z-MCECD)with MC-PBA film. In addition, the Zn-Fe PBA film is used as ion storage layer which can significantly reduce the overpotential from 4.0 V to 1.5 V in the corresponding ECD. Benefiting from the advantages of Zn-Fe PBA film, Z-MCECD maintains four typical color states of red, blue, green, and yellow, while the operating voltage is lower and the cycle stability is also significantly improved. The transmittance control range within 2400 s was almost no attenuated, and after 3600 s, transmittance still maintained 74.4% of the initial, while the multicolor group experienced completely irreversible performance loss after 1200 s. Z-MCECD has great application potential in color electrochromic display field.

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Thin layer films of copper hexacyanoferrate: Structure identification and analytical applications

Cited by 9 publications

References 52 publications

Morphology and Conductivity of Copper Hexacyanoferrate Films

Morphology and Conductivity of Copper Hexacyanoferrate Films

Operando XAFS and XRD Study of a Prussian Blue Analogue Cathode Material: Iron Hexacyanocobaltate

Zn-Fe PBA Films by Two-step Electrodeposition Method: Preparation and Performance in Electrochromic Devices

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