Controlling the Morphology and Electrochemical Properties of Electrodeposited Nickel Hexacyanoferrate

IF 3.5 4区 化学 Q2 ELECTROCHEMISTRY
Tim Steeger, Raphael L. Streng, Anatoliy Senyshyn, Vadim Dyadkin, Xaver Lamprecht, Roman List, Aliaksandr S. Bandarenka
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Abstract

In recent years, Prussian blue analogs (PBAs) have gained significant attention due to their broad applicability. The synthesis routines of this material class have been shown to allow for great tunability by varying the corresponding parameters. The control of crystal phase, defect, and water content, as well as electrochemical properties, have been studied extensively for the state-of-the-art coprecipitation method. In turn, electrochemical deposition, which is particularly suited for thin-film production, remains mainly underexplored. This study investigates the effects of synthesis temperature, scan rate, precursor concentration, and supporting electrolyte pH on nickel hexacyanoferrate (NiHCF) films electrodeposited onto a high surface area carbon-based substrate via cyclic voltammetry. Electrochemical analysis and morphological characterization reveal that higher deposition temperatures increase cation-specific capacity, influence NiHCF coverage, and promote larger, more crystalline structures. Scan rate, precursor concentration, and pH variations further demonstrate the correlation between deposition parameters, crystallite size, and NiHCF structure. These findings highlight the tunability of electrodeposited PBAs for tailored electrochemical performance and morphology.

Abstract Image

电沉积六氰高铁酸镍的形貌和电化学性能控制
近年来,普鲁士蓝类似物(PBAs)因其广泛的适用性而受到了广泛的关注。这类材料的合成程序已被证明可以通过改变相应的参数来实现很大的可调性。对于最先进的共沉淀法,晶相、缺陷、含水量以及电化学性能的控制已经得到了广泛的研究。反过来,特别适合薄膜生产的电化学沉积技术仍未得到充分开发。本研究通过循环伏安法研究了合成温度、扫描速率、前驱体浓度和负载电解质pH对电沉积在高表面积碳基衬底上的NiHCF薄膜的影响。电化学分析和形态表征表明,较高的沉积温度会增加阳离子比容量,影响NiHCF覆盖率,并促进更大、更多的晶体结构。扫描速率、前驱体浓度和pH变化进一步证明了沉积参数、晶粒尺寸和NiHCF结构之间的相关性。这些发现强调了电沉积PBAs在定制电化学性能和形态方面的可调性。
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来源期刊
ChemElectroChem
ChemElectroChem ELECTROCHEMISTRY-
CiteScore
7.90
自引率
2.50%
发文量
515
审稿时长
1.2 months
期刊介绍: ChemElectroChem is aimed to become a top-ranking electrochemistry journal for primary research papers and critical secondary information from authors across the world. The journal covers the entire scope of pure and applied electrochemistry, the latter encompassing (among others) energy applications, electrochemistry at interfaces (including surfaces), photoelectrochemistry and bioelectrochemistry.
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