FeCo alloy/N, S dual-doped carbon composite as a high-performance bifunctional catalyst in an advanced rechargeable zinc-air battery

Chang, Shengming; Zhang, Hui; Zhang, Zhongyi

doi:10.1016/j.jechem.2020.07.047

Cited by 121 publications

(69 citation statements)

References 54 publications

(78 reference statements)

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“…The increased proportion of MOH/ MOOH for FeCo 2 O 4 -M (25.5%) compared with 23.4% for FeCo 2 O 4 reveals its increased oxygen adsorption capacity and thus enhanced OER/ORR activity. [43,44] The Fourier transform (FT) extended XAFS (EXAFS) spectra of FeCo 2 O 4 and FeCo 2 O 4 -M are shown in Figure 4e,f. In the R space plots of Fe K-edge, the main peak located at 1.59 Å represents the FeO bond, meanwhile, peaks located at 2.60 and 3.11 Å represent the single scattering of FeFe, or FeCo bonds due to the similar coordination of Co and Fe (Figure 4e).…”

Section: Resultsmentioning

confidence: 99%

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Zhang

Qian

et al. 2021

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The application of magnetic fields in the oxygen reduction/evolution reaction (ORR/OER) testing for electrocatalysts has attracted increasing interest, but it is difficult to characterize on-site surface reconstruction. Here, a strategy is developed for annealing-treated FeCo 2 O 4 nanofibers at a magnetic field of 2500 Oe, named FeCo 2 O 4 -M, showing a right-shifted half-wave potential of 20 mV for the ORR and a left-shifted overpotential of 60 mV at 10 mV cm −2 for the OER as compared with its counterpart. Magnetic characterizations indicate that FeCo 2 O 4 -M shows the spin-state transition of cations from a low-spin state to an intermediate-spin state compared with FeCo 2 O 4 . Mössbauer spectra show that the Fe 3+ ion in the octahedral site (0.76) of FeCo 2 O 4 -M is more than that of FeCo 2 O 4 (0.71), indicating the effective stimulus of metal cations in geometric sites by magnetic-field annealing. Furthermore, theoretical calculations demonstrate that the d-band centers (ε d ) of Co 3d and Fe 3d in the tetrahedral and octahedral sites of the FeCo 2 O 4 -M nanofibers shift close to the Fermi level, revealing the enhanced mechanism of the ORR/OER activity.

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Section: Resultsmentioning

confidence: 99%

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Zhang

Qian

et al. 2021

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“…A summary of the battery performance of ZAB based on carbon fiber-based air electrodes in the literature. References [44,45] were cited in Supplementary Materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Co3O4 Nanoneedle Array Grown on Carbon Fiber Paper for Air Cathodes towards Flexible and Rechargeable Zn–Air Batteries

Han

Jia

et al. 2021

Nanomaterials

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An economical and efficient method is developed for preparing flexible cathodes. In this work, a dense mesoporous Co3O4 layer was first hydrothermally grown in situ on the surface of chopped carbon fibers (CFs), and then carbon fiber paper (Co3O4/CP) was prepared by a wet papermaking process as a flexible zinc-air battery (ZAB). The high-performance air cathode utilizes the high specific surface area of a single chopped carbon fiber, which is conducive to the deposition and adhesion of the Co3O4 layer. Through the wet papermaking process, Co3O4/CP has ultra-thin, high mechanical stability and excellent electrical conductivity. In addition, the assembled ZAB exhibits relatively excellent electrochemical performance, with a continuous cycle of more than 180 times at a current density of 2 mA·cm−2. The zinc-air battery can maintain a close fit and work stably and efficiently even under high bending conditions. This process of combining single carbon fibers to prepare ultra-thin, high-density, high-conductivity carbon fiber paper through a papermaking process has huge application potential in the field of flexible wearables.

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“…14,15 Metal-air batteries mainly depend on two electrochemical reactions, which are highly sluggish that is, oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) for charge and discharge, respectively. 11,[16][17][18][19] However, despite being much efficient, the effectiveness of the secondary Zn-air battery limits by its high overpotential, slow kinetics, and less effective changeability of OER and ORR occurring at an air electrode. 14 The battery also suffers disadvantages like dendritic growth of zinc anode, failure in air electrode by the change in morphology of the zinc electrode, and other factors.…”

Section: Introductionmentioning

confidence: 99%

“…The perovskite materials chemical, structural, and physical features can be manipulated and tailored by various synthesis methods improving physiochemical properties, providing them high flexibility in the catalyst composition, and improving the stability, confirming them as an efficient bifunctional catalyst for zinc-air-batteries. 18 Stoerzinger et al 33 proposed several structural designs to improve the ORR/OER activities of perovskites catalysts. According to their investigation, the ORR/OER functionalities of perovskite depend on the B-site covalency of transition metal-oxygen and the σ*-orbital, for example, occupation.…”

Section: Introductionmentioning

confidence: 99%

“…Strontium-doped LaMnO 3 has also been developed as an electrocatalyst for the applications of solid-oxide fuel cells (SOFCs). 18 Due to high abundance, environment friendliness, and low cost, researchers are more focused on developing Mn 3+ doped perovskite catalysts such as LaMnO 3 , La 0.8 Sr 0.2 Mn 0.6 Ni 0.4 O 3 , Pr 0.5 Ba 0.5 MnCo 0.2 O 3 , and so forth. At B-site, the thermal stability of perovskites with Mn 3+ is superior to that with other elements.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of a novel Sr₂TiMnO₆ double perovskite electrocatalyst for rechargeable zinc–air batteries

et al. 2021

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Perovskite-based catalysts have received a lot attention as bifunctional oxygen evolution reaction and oxygen reduction reaction (ORR/OER) catalysts in secondary rechargeable zinc-air batteries due to their tunable structure, stability at high current densities, low cost, lightweight, and nontoxicity. This paper investigates a new perovskite material, Sr 2 TiMnO 6 (STMO), for a rechargeable zinc-air battery (ZAB). The crystalline structure, morphology, and adsorption/ desorption behavior of STMO are thoroughly studied and investigated their catalytic processes. The perovskite catalyst shows high catalytic activities, durability, and endurance in the alkaline medium, resulting in the power density of 97 mWÁcm À2 , and a specific capacity of 705.21 mAhÁg À1 . The rechargeable STMO ZAB exhibited good cycling stability with the current density of 3.5 mAÁcm À2 for 6.66 h and low overpotential. The observed results promise STMO to be a viable candidate as a functional (ORR/OER) electrocatalyst which can be successfully used for commercial fuel-cells and metal air batteries. K E Y W O R D Snickel foam, oxygen evolution and reduction reactions, perovskite catalyst, Sr 2 TiMnO 6 , zinc-air battery

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FeCo alloy/N, S dual-doped carbon composite as a high-performance bifunctional catalyst in an advanced rechargeable zinc-air battery

Cited by 121 publications

References 54 publications

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Co3O4 Nanoneedle Array Grown on Carbon Fiber Paper for Air Cathodes towards Flexible and Rechargeable Zn–Air Batteries

Synthesis of a novel Sr₂TiMnO₆ double perovskite electrocatalyst for rechargeable zinc–air batteries

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FeCo alloy/N, S dual-doped carbon composite as a high-performance bifunctional catalyst in an advanced rechargeable zinc-air battery

Cited by 121 publications

References 54 publications

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo2O4 for Enhanced Oxygen Catalytic Activity

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo2O4 for Enhanced Oxygen Catalytic Activity

Co3O4 Nanoneedle Array Grown on Carbon Fiber Paper for Air Cathodes towards Flexible and Rechargeable Zn–Air Batteries

Synthesis of a novel Sr2TiMnO6 double perovskite electrocatalyst for rechargeable zinc–air batteries

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Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo₂O₄ for Enhanced Oxygen Catalytic Activity

Synthesis of a novel Sr₂TiMnO₆ double perovskite electrocatalyst for rechargeable zinc–air batteries