Development of potassium ferrate(VI) cathode material stabilized with yttria doped zirconia coating for alkaline super-iron battery

Zhang, Yuqing; Zhang, Guodong; Du, Tingdong

doi:10.1016/j.electacta.2010.10.027

Cited by 16 publications

(6 citation statements)

References 20 publications

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“…Following the same concept, BaFeO 4 cathodes were coated with SiO 2 and TiO 2 nanoparticulate thin films using sol‐gel techniques for applications in zinc‐alkaline or lithium non‐aqueous batteries . Yttrium‐doped zirconia was also employed in subsequent studies using solutions of yttrium nitrate and zirconium oxychloride in diethyl ether for the coating of K 2 [FeO 4 ] …”

Section: The Chemistry Of Ferrates(vi)mentioning

confidence: 99%

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII

Schmidbaur

2018

Zeitschrift anorg allge chemie

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The history of the oxo compounds of iron in its highest oxidation states is reviewed and modern activities in this long neglected area of inorganic chemistry are highlighted. The chemistry of ferrates(VI) is the most rapidly advancing branch owing to several potential applications in diverse fields such as environmental chemistry and energy storage. Convenient and high‐yield preparations of ferrates(VI) in high purity are presented, followed by a coverage of the analytical, spectroscopic, and structural characterization in the solid and in solution, with a focus on the stability of these compounds, which had long been under‐estimated. Particular attention has been paid to the fascinating mechanisms that have been proposed for the intriguing “self‐decay” of the [FeO4]2– dianion. Redox processes with inorganic and organic substrates are summarized including fresh and waste water treatment on the one hand and “super‐iron batteries” on the other. Recent advances in the experimental and computational approach to ferrates(VII) [FeO4]– and the elusive “iron tetroxide” [FeO4] are described.

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Section: The Chemistry Of Ferrates(vi)mentioning

confidence: 99%

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII

Schmidbaur

2018

Zeitschrift anorg allge chemie

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“…ZrO 2 provides an intact shield for the cathode materials; meanwhile, the hydroxide could shuttle through the coating to sustain the alkaline cathode redox chemistry of electrode. Zhang et al [7,8] found that Y 2 O 3 doped ZrO 2 used as a protecting coating can improve the stability and charge transfer of K 2 FeO 4 electrode in alkaline electrolytes. It shows a relatively remarkable discharge property and stability compared to bare K 2 FeO 4 or ZrO 2 -coated K 2 FeO 4 cathodes.…”

Section: Introductionmentioning

confidence: 98%

Preparation and stability study of potassium ferrate (VI) coated with phthalocyanine for alkaline super-iron battery

Huang

Yang

Wang

et al. 2014

J Solid State Electrochem

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The potassium ferrate (VI) coated with phthalocyanine (H 2 Pc) was successfully prepared via a facile coprecipitation process. Scanning electron microscopy and Fourier transform infrared spectrum revealed that K 2 FeO 4 had been coated with H 2 Pc particles. When evaluated as cathodic material for alkaline super-ion battery, the effects of H 2 Pc coating on the electrochemical stability of K 2 FeO 4 electrodes upon prolonged immersion time were investigated by galvanostatic discharge test, open-circuit potential measurements, and electrochemical impedance spectroscopy. The results show that the decomposition of K 2 FeO 4 in electrolyte is obviously suppressed by H 2 Pc coating with a short immersion time, which could enhance the discharge capacity of electrodes. Furthermore, the open-circuit potential of the H 2 Pccoated K 2 FeO 4 electrode is higher than that of the bare K 2 FeO 4 electrode, which indicates the improvement of anticorrosive ability. In addition, the ability of charge transfer between electrode and electrolyte is enhanced by H 2 Pc coating due to the inhibition on formation of Fe (III) layer, but the improved performance will decline upon prolonged immersion time.

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“…Walz et al [17] investigated the stabilization of BaFeO 4 materials by nanoporous silica coatings and showed that these coatings * Baohui Wang wangbh@nepu.edu.cn stabilize BaFeO 4 when stored in air and, to a lesser degree, electrolyte solutions. Zhang et al [18] investigated that the Y 2 O 3 -ZrO 2 composite coatings were used to greatly improve the stability and charge transfer properties of K 2 FeO 4 cathodes in an alkaline electrolyte relative to the uncoated cathode. More research [16,19,20] combined the use of organic compounds and inorganic materials to coat K 2 FeO 4 to improve the stabilization of ferrate in recent years.…”

Section: Introductionmentioning

confidence: 99%

The adoption and mechanism of KIO4 for redox-equilibrated stabilization of FeO4 2− as an equalizer in water

Wang

Dong

et al. 2016

Ionics

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The inherent thermodynamic instability of FeO 4 2− in water restricts its applications in water treatment, battery, and organic synthesis. The objective of this paper was to research and develop an additive for stabilization and mechanism of aqueous FeO 4 2− solution on the basis of a choice of the redox equilibration. In this study, it was found that FeO 4 2− in water was stabilized by the right match and adoption of KIO 4 called an equalizer. The redox thermodynamic analysis and dynamic experimental results show that the adoption of KIO 4 equalizer greatly increased lifetime of FeO 4 2− in water by orders of magnitude. The stabilization mechanism is attributed to occur via the effect of redox equilibrium of the FeO 4 2− and the IO 4 − species, as well as the formation of an oxidizing chemical environment. This study opens up possibilities for stabilization of solid ferrate compounds, for example, for use in the water treatment and super-iron battery.

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Development of potassium ferrate(VI) cathode material stabilized with yttria doped zirconia coating for alkaline super-iron battery

Cited by 16 publications

References 20 publications

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII

Preparation and stability study of potassium ferrate (VI) coated with phthalocyanine for alkaline super-iron battery

The adoption and mechanism of KIO4 for redox-equilibrated stabilization of FeO4 2− as an equalizer in water

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Development of potassium ferrate(VI) cathode material stabilized with yttria doped zirconia coating for alkaline super-iron battery

Cited by 16 publications

References 20 publications

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: FeVI – FeVIII

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: FeVI – FeVIII

Preparation and stability study of potassium ferrate (VI) coated with phthalocyanine for alkaline super-iron battery

The adoption and mechanism of KIO4 for redox-equilibrated stabilization of FeO4 2− as an equalizer in water

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The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII

The History and the Current Revival of the Oxo Chemistry of Iron in its Highest Oxidation States: Fe^VI – Fe^VIII