Manganese oxide catalysts for secondary zinc air batteries: from electrocatalytic activity to bifunctional air electrode performance

Mainar, Aroa R.; Colmenares, Luis C.; Leonet, Olatz; Alcaide, Francisco; Iruin, J. J.; Weinberger, Stephan; Hacker, Viktor; Iruin, Elena; Urdanpilleta, Idoia; Blázquez, J. Alberto

doi:10.1016/j.electacta.2016.09.052

Cited by 97 publications

(68 citation statements)

References 44 publications

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“…Similar to Co 3 O 4 , MnO x is promising for application as ORR and OER electrocatalysts and possess advantages such as high abundancy, nontoxicity, low costs, and eco‐friendliness . In addition, the MnO x family possesses over 30 different crystal structures and variable valences of Mn centers in different polymorphs.…”

Section: Advancements Of Tm‐based Electrocatalystsmentioning

confidence: 97%

A review of transition metal‐based bifunctional oxygen electrocatalysts

Ibrahim

Tsai

Chala

et al. 2019

J Chinese Chemical Soc

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Electrochemical energy storage and conversion devices play a key role in the development of clean, sustainable, and efficient energy systems to meet the sustainable growth of our society. However, challenging issues including the sluggish kinetics of oxygen electrode reactions involving the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are present, limiting the implementation of devices such as metal‐air batteries, water electrolyzers, and regenerative fuel cells. In this review, various monometallic and bimetallic transition metal oxides (TMOs) and hydroxides are summarized in terms of their application for ORR/OER, in which the merits and demerits of various precious metal and carbon‐based metal oxide materials are discussed, with requirements for better electrocatalysts and catalyst support being introduced as well. Following this, different approaches to improve catalytic activity such as the introduction of doping and defects, the manipulation of crystal facets, and the engineering of supports, compositions, and morphologies are summarized in which TMOs with improved ORR/OER catalytic activities can be synthesized, further improving the speed, stability, and polarization of electrochemical energy storage and conversion devices. Finally, perspectives into the improvement of performance and the better understanding of ORR/OER mechanisms for bifunctional electrocatalysts using in situ spectroscopic techniques and density functional theory calculations are also discussed.

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Section: Advancements Of Tm‐based Electrocatalystsmentioning

confidence: 97%

A review of transition metal‐based bifunctional oxygen electrocatalysts

Ibrahim

Tsai

Chala

et al. 2019

J Chinese Chemical Soc

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“…The battery consists of a metallic Zn electrode and a porous gas‐diffusion electrode (GDE) loaded with a bifunctional air catalyst. MnO 2 is the most commonly used non‐precious metal catalyst . The liquid electrolyte separates the electrodes and conducts ions across the cell.…”

Section: Introductionmentioning

confidence: 99%

“…MnO 2 is the most commonly used non-precious metal catalyst. [17,27] The liquid electrolyte separates the electrodes and conducts ions across the cell. Depending on the distance between the electrodes, this region may or may not contain ap orous separator to preventa ni nternal short circuit.…”

Section: Introductionmentioning

confidence: 99%

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

2017

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Neutral aqueous electrolytes have been shown to extend both the calendar life and cycling stability of secondary zinc–air batteries (ZABs). Despite this promise, there are currently no modeling studies investigating the performance of neutral ZABs. Traditional continuum models are numerically insufficient to simulate the dynamic behavior of these complex systems because of the rapid, orders‐of‐magnitude concentration shifts that occur. In this work, we present a novel framework for modeling the cell‐level performance of pH‐buffered aqueous electrolytes. We apply our model to conduct the first continuum‐scale simulation of secondary ZABs using aqueous ZnCl2–NH4Cl as electrolyte. We first use our model to interpret the results of two recent experimental studies of neutral ZABs, showing that the stability of the pH value is a significant factor in cell performance. We then optimize the composition of the electrolyte and the design of the cell considering factors including pH stability, final discharge product, and overall energy density. Our simulations predict that the effectiveness of the pH buffer is limited by slow mass transport and that chlorine‐containing solids may precipitate in addition to ZnO.

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“…8 Manganese oxides are active toward ORR and are used in commercial primary zinc-air batteries. [9][10][11][12][13] However, their ORR activity is limited by the low electrical conductivity of the oxides, which can be improved by adding carbon blacks or hybridizing with conductive agents like carbon nanotubes or graphenes. [14][15][16] In addition, manganese oxides do not have appreciable OER activity and should be combined with another OER electrocatalyst.…”

mentioning

confidence: 99%

Sequentially Electrodeposited MnO_X/Co-Fe as Bifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries

Xiong

Ivey

2017

J. Electrochem. Soc.

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Manganese oxide (MnOx) and cobalt-iron (Co-Fe) were sequentially electrodeposited onto a gas diffusion layer (GDL) as bifunctional electrocatalysts for rechargeable zinc-air batteries. The fabricated material was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The sequentially deposited MnOx/Co-Fe catalysts, tested using cyclic voltammetry (CV), showed activity for both the oxygen reduction and oxygen evolution reactions (ORR and OER), with better performance than either MnOx or Co-Fe alone. The fabricated material was assembled into a zinc-air battery as the air electrode component for battery cycling tests. The zinc-air battery using MnOx/Co-Fe catalysts exhibited good discharge-recharge performance and a cycling efficiency of 59.6% at 5 mA cm −2 , which is comparable to Pt/C catalysts. In addition, the electrodeposited MnOx/Co-Fe layer showed strong adhesion to the gas diffusion layer (GDL) and was structurally stable throughout 40 h of battery cycling.

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Manganese oxide catalysts for secondary zinc air batteries: from electrocatalytic activity to bifunctional air electrode performance

Cited by 97 publications

References 44 publications

A review of transition metal‐based bifunctional oxygen electrocatalysts

A review of transition metal‐based bifunctional oxygen electrocatalysts

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

Sequentially Electrodeposited MnO_X/Co-Fe as Bifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries

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Manganese oxide catalysts for secondary zinc air batteries: from electrocatalytic activity to bifunctional air electrode performance

Cited by 97 publications

References 44 publications

A review of transition metal‐based bifunctional oxygen electrocatalysts

A review of transition metal‐based bifunctional oxygen electrocatalysts

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

Sequentially Electrodeposited MnOX/Co-Fe as Bifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries

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Product

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Sequentially Electrodeposited MnO_X/Co-Fe as Bifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries