Towards core-shell bifunctional catalyst particles for aqueous metal-air batteries: NiFe-layered double hydroxide nanoparticle coatings on γ-MnO 2  microparticles

Flegler, Andreas; Müssig, Stephan; Prieschl, Johannes; Mandel, Karl; Sextl, Gerhard

doi:10.1016/j.electacta.2017.01.179

Cited by 17 publications

(17 citation statements)

References 25 publications

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“…13 The latter also exhibits broad applicability in flame retardancy, 14 sensors, 15 electrocatalysis, 16 water oxidation, 17 oxygen evolution 18 and energy storage. 19 The application of Ni-Fe LDH in these fields is largely owed to their inherent material properties such as simplistic methods of fabrication, low cost, large specific surface areas, greater active sites and ability to interact with various catalytic supports. In fact, the calcination of LDH materials in general has received an abundance of attention from both an applications and scientific perspective.…”

Section: Introductionmentioning

confidence: 99%

Structural transformation of layered double hydroxides: an in situ TEM analysis

et al. 2018

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A comprehensive nanoscale understanding of layered double hydroxide (LDH) thermal evolution is critical for their current and future applications as catalysts, flame retardants and oxygen evolution performers. In this report, we applied in situ transmission electron microscopy (TEM) to extensively characterise the thermal progressions of nickel-iron containing (Ni-Fe) LDH nanomaterials. The combinative approach of TEM and selected area electron diffraction (SAED) yielded both a morphological and crystallographic understanding of such processes. As the Ni-Fe LDH nanomaterials are heated in situ, an amorphization occurred at 250°C, followed by a transition to a heterogeneous structure of NiO particles embedded throughout a NiFe 2 O 4 matrix at 850°C, confirmed by highresolution TEM and scanning TEM. Further electron microscopy characterisation methodologies of energy-filtered TEM were utilised to directly observe these mechanistic behaviours in real time, showing an evolution and nucleation to an array of spherical NiO nanoparticles on the platelet surfaces. The versatility of this characterisation approach was verified by the analogous behaviours of Ni-Fe LDH materials heated ex situ as well as parallel in situ TEM and SAED comparisons to that of an akin magnesium-aluminium containing (Mg-Al) LDH structure. The in situ TEM work hereby discussed allows for a state-of-the-art understanding of the Ni-Fe material thermal evolution. This is an important first, which reveals pivotal information, especially when considering LDH applications as catalysts and flame retardants.

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Section: Introductionmentioning

confidence: 99%

Structural transformation of layered double hydroxides: an in situ TEM analysis

et al. 2018

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“…[301][302][303] Among these batteries, metal-oxygen/air batteries and Li-S batteries have been considered as promising candidates for the next-generation electro-chemical energy-storage technologies because of their overwhelming advantages in energy density. [304][305][306][307] For example, the theoretical energy density of Li-O2 (aq) is 3582 Wh kg -1 and for the Zn-air system, the value is still remarkably high at 1086 Wh kg -1 . 306 For metal-oxygen/air batteries, their working principle is that during discharge, oxygen is reduced to hydroxide ions.…”

Section: Batteriesmentioning

confidence: 99%

“…[304][305][306][307] For example, the theoretical energy density of Li-O2 (aq) is 3582 Wh kg -1 and for the Zn-air system, the value is still remarkably high at 1086 Wh kg -1 . 306 For metal-oxygen/air batteries, their working principle is that during discharge, oxygen is reduced to hydroxide ions. This reaction is called the oxygen reduction reaction (ORR).…”

Section: Batteriesmentioning

confidence: 99%

“…Unfortunately, one of the greatest challenges for these types of batteries is the high overpotential at the oxygen/air-cathode, i.e., at the so called gas diffusion electrode, which occurs with both the ORR and the OER. 306 To reduce the overpotential for the OER and the ORR, respectively, new generation catalysts are needed. As for Li-S batteries, some valuable characteristics of sulfur, such as its high natural abundance, low cost, and nontoxicity, make Li-S batteries even more commercially competitive than the current LIBs.…”

Section: Batteriesmentioning

confidence: 99%

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Functionalized layered double hydroxides for innovative applications

et al. 2020

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“…According to the reaction principle, the fundamental reason for the continuous reaction is the different potential between the anode and cathode. The different potential promotes the continuous flow of electrons [24]. Some of the metal standard potentials of the metal-air battery anode are shown in Table 2.…”

Section: The Reaction Principle Of Metal-air Batterymentioning

confidence: 99%

Review of the application of metal-air battery principlein water treatment

et al. 2019

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The reaction principle of metal air battery is expounded, and the application of this method in the field of water treatment as an emerging technology is introduced. The recent research results of domestic and foreign researchers using metal-air battery technology to treat pollutants in water (such as removing arsenic, reducing COD and collecting algae in water) are introduced, and the actual treatment effects of these methods are briefly described. The feasibility of applying metal-air battery technology to water treatment is analyzed. At the same time, the problems of water treatment using metal-air battery are pointed out. The broad application prospects of this technology are analyzed and prospected.

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Towards core-shell bifunctional catalyst particles for aqueous metal-air batteries: NiFe-layered double hydroxide nanoparticle coatings on γ-MnO 2 microparticles

Cited by 17 publications

References 25 publications

Structural transformation of layered double hydroxides: an in situ TEM analysis

Structural transformation of layered double hydroxides: an in situ TEM analysis

Functionalized layered double hydroxides for innovative applications

Review of the application of metal-air battery principlein water treatment

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