Self-template construction of 2D amorphous N-doped CoFe-mesoporous phosphate microsheets for zinc-air batteries

Pan, Dong-Sheng; Chen, Peng; Zhou, Licheng; Liu, Jiehua; Guo, Zheng-Han; Song, Jun‐Ling

doi:10.1016/j.jpowsour.2021.229859

Cited by 15 publications

(9 citation statements)

References 58 publications

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“…Inspired by the superior bifunctional performance of O-np-Ni 5 Co 10 (Al), a rechargeable ZAB is assembled to investigate its application under practical conditions (Figure 5a). As anticipated, O-np-Ni 5 Co 10 (Al)-based ZAB presents an open-circuit potential (OCP) of 1.49 V (Figure 5b), which is slightly lower than that of Pt/C (1.50 V, Figure S10d) but superior to reported Co-MOF-800 (1.38 V), [33] CoFe/N-HCSs (1.387 V), [34] and NCFPO-350 (1.36 V) [35] (Table S12). The galvanostatic discharge measurements for O-np-Ni 5 Co 10 (Al)-based ZAB in Figure 5c display a negligible voltage attenuation at the current densities from 2 to 10 mA cm À 2 .…”

Section: Zn-air Battery Testingmentioning

confidence: 94%

Dealloying‐Derived Porous Spinel Oxide for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‐Air Batteries: Promotion of Activity Via Hereditary Al‐Doping

et al. 2022

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The large-scale fabrication of highly efficient and low-cost bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is critical to the development of rechargeable zinc-air batteries (ZABs). Herein, a scalable dealloying strategy was proposed to obtain hierarchically porous spinel-type oxide with minor hereditary Al doping. Benefiting from the well-structured porosity and native dopant, O-np-Ni 5 Co 10 (Al), namely AlÀ NiCo 2 O 4 , exhibited excellent electrocatalytic ORR and OER activities, giving a small potential gap of 0.71 V. The rechargeable ZAB with O-np-Ni 5 Co 10 (Al) as cathode catalyst delivered a high specific capacity of 757 mAh g À 1 , a competitive peak power density of 142 mW cm À 2 , and a long-term discharge-charge cycling stability. Furthermore, density functional theory calculations evidenced that appropriate Al doping into NiCo 2 O 4 could significantly reduce the Gibbs free energy difference to 1.71 eV. This work is expected to inspire the design of performance-oriented bifunctional electrocatalysts for wider applications in renewable energy systems.

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Section: Zn-air Battery Testingmentioning

confidence: 94%

Dealloying‐Derived Porous Spinel Oxide for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‐Air Batteries: Promotion of Activity Via Hereditary Al‐Doping

et al. 2022

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“…OER performance of recently reported CoFe bimetallic powder catalyst. References [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] are cited in the supplementary materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Dual-Metal Zeolitic Imidazolate Framework Derived Highly Ordered Hierarchical Nanoarrays on Self-Supported Carbon Fiber for Oxygen Evolution

Zhang

et al. 2022

Materials

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The construction of highly ordered hierarchical nanoarrays is crucial for obtaining effective transition metal carbon nanomaterial electrocatalysts for oxygen evolution reaction (OER) in water splitting. Herein, we adopted a Co metal zeolitic imidazolate framework (Co-ZIF) as a precursor by ion-exchange/etching reaction with Fe(NO3)3 to obtain hierarchical N-doped Co-Fe layered double hydroxide (CoFe-LDH) in situ generated in Co-ZIF nanoarrays based on a self-supported carbon cloth (CC) substrate noted as CoFe-LDH@Co-ZIF@CC. Benefiting from the synergistic effect of these species and their highly ordered self-supported nanoarray structure, the catalytic active sites were fully exposed and highly protected in alkaline electrolyte, which significantly promoted electron transport and improved electrochemical performance. The CoFe-LDH@Co-ZIF@CC exhibited the low overpotentials of about 225 and 319 mV at 10 and 100 mA cm−2 with a small Tafel slope of 81.8 mV dec−1 recorded in a 1.0 M KOH electrolyte. In addition, it also showed a long-term durability without obvious decay after 30 h. Therefore, its remarkable OER activity demonstrates this material’s promising application in the green hydrogen energy industry.

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“…26 The introduction of nitrogen atoms can further improve the electrical conductivity of the materials, and can adjust the charge density of neighboring carbon atoms, so as to enhance the affinity of the adsorption intermediates in the reaction process. 27,28 Using a MOF material as the precursor, M–N–C can retain the skeleton and original topology with high porosity, which is conducive to mass diffusion and can improve the structural stability. At the same time, combined with the vapor deposition strategy, more nitrogen atoms are evenly doped to form more active sites in the carbon matrix, which is conducive for accelerating the ORR/OER/HER reactions.…”

Section: Introductionmentioning

confidence: 99%

Dicyandiamide-assisted synthesis of N-doped porous CoMn–Nx@N–C carbon nanotube compositesviaMOFs as efficient trifunctional electrocatalysts in the same electrolyte

Feng

Xie

et al. 2023

Nanoscale

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Self-template construction of 2D amorphous N-doped CoFe-mesoporous phosphate microsheets for zinc-air batteries

Cited by 15 publications

References 58 publications

Dealloying‐Derived Porous Spinel Oxide for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‐Air Batteries: Promotion of Activity Via Hereditary Al‐Doping

Dealloying‐Derived Porous Spinel Oxide for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‐Air Batteries: Promotion of Activity Via Hereditary Al‐Doping

Dual-Metal Zeolitic Imidazolate Framework Derived Highly Ordered Hierarchical Nanoarrays on Self-Supported Carbon Fiber for Oxygen Evolution

Dicyandiamide-assisted synthesis of N-doped porous CoMn–Nx@N–C carbon nanotube compositesviaMOFs as efficient trifunctional electrocatalysts in the same electrolyte

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