Nitrogen-Doped Sponge Ni Fibers as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction

Zhang, Kaili; Xia, Xinhui; Deng, Shengjue; Zhong, Yu; Xie, Dong; Pan, Guoxiang; Wu, Jianbo; Liu, Qi; Wang, Xiuli; Tu, Jiangping

doi:10.1007/s40820-019-0253-5

Cited by 80 publications

(44 citation statements)

References 48 publications

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“…The peaks at 531.4 and 533.1 eV in the O 1s spectra should be ascribed to the surface-adsorbed hydroxyl groups and adsorbed water, respectively, and the peak at 529.8 eV should be attributed to lattice oxygen of minor metal oxides in the sample ( Figure 2 e). 25 The three peaks located at 398.5, 399.3, and 400.6 eV in N 1s spectra should be assigned to pyridine N, pyrrole N, and graphite N, respectively ( Figure 2 f). This result implies that the N element has been successfully incorporated into carbon.…”

Section: Resultsmentioning

confidence: 96%

MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

et al. 2021

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The development of low-cost and efficient electrocatalysts for oxygen evolution reaction (OER) is of great importance for producing hydrogen via water splitting. Metal–organic frameworks (MOFs) provide an opportunity for the facile preparation of high-efficiency OER electrocatalysts. In this work, we prepared iron-doped nickel nanoparticles encapsulated in nitrogen-doped carbon microspheres (Fe-Ni@NC) with a unique hierarchical porous structure by directly pyrolyzing the MOF precursor for effectively boosting OER. The Fe doping has a significant enhancement effect on the catalytic performance. The optimized Fe (5%)-Ni@NC catalyst represents a remarkable activity with an overpotential of 257 mV at 10 mA cm –2 and superior stability toward OER in 1.0 M KOH.

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Section: Resultsmentioning

confidence: 96%

MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

et al. 2021

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“…To date, the benchmark catalysts of ORR and OER are noble metal materials; however, their high cost, disappointing bifunctionality, and poor durability have largely hindered their extensive practical applications . Thus, there is a need to urgently to develop highly efficient, stable, and low cost bifunctional electrocatalysts for ORR and OER.…”

Section: Introductionmentioning

confidence: 99%

Uniform Virus‐Like Co–N–Cs Electrocatalyst Derived from Prussian Blue Analog for Stretchable Fiber‐Shaped Zn–Air Batteries

Chen

et al. 2020

Adv Funct Materials

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Zn‐air batteries (ZABs) offer promising commercialization perspectives for stretchable and wearable electronic devices as they are environment‐friendly and have high theoretical energy density. However, current devices suffer from limited energy efficiency and durability because of the sluggish oxygen reduction and evolution reactions kinetics in the air cathode as well as degenerative stretchability of solid‐state electrolytes under highly alkaline conditions. Herein, excellent bifunctional catalytic activity and cycling stability is achieved by using a newly developed Co–N–C nanomaterial with a uniform virus‐like structure, prepared via a facile carbonization of a prussian blue analogue (PBA). Furthermore, a solid‐state dual‐network sodium polyacrylate and cellulose (PANa‐cellulose) based hydrogel electrolyte is synthesized with good alkaline‐tolerant stretchability. A solid‐state fiber‐shaped ZAB fabricated using this hydrogel electrolyte, the virus‐like Co–N–Cs air cathode, and a zinc spring anode display excellent stretchability of up to 500% strain without damage, and outstanding electrochemical performance with 128 mW cm−2 peak power density and good cycling stability for >600 cycles at 2 mA. The facile synthesis strategy demonstrated here opens up a new avenue for developing highly active PBA‐derived catalyst and shows, for the first time, that virus‐like structure can be favorable for electrochemical performance.

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“…The sustainable development of social economy is closely linked with the innovation of electrochemical energy storage technology. [ 1–4 ] Since the beginning of the 21st century, the electric transportation and modern smart electronics have entered into a fast track of development, and consequently promote the rapid growth of battery market, [ 5–10 ] especially the high‐performance lithium ion batteries (LIBs). [ 11–16 ] Over the past decades, with the adoption of high energy electrode materials, LIBs technology is developing rapidly and new electric vehicle (EV) models are being rolled out with much improved mileage range.…”

Section: Introductionmentioning

confidence: 99%

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

Huang

Liu

et al. 2020

Adv Funct Materials

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237

136

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Pursuit of advanced batteries with high-energy density is one of the eternal goals for electrochemists. Over the past decades, lithium-sulfur batteries (LSBs) have gained world-wide popularity due to their high theoretical energy density and cost effectiveness. However, their road to the market is still full of thorns. Apart from the poor electronic conductivity of sulfur-based cathodes, LSBs involve special multielectron reaction mechanisms associated with active soluble lithium polysulfides intermediates. Accordingly, the electrode design and fabrication protocols of LSBs are different from those of traditional lithium ion batteries. This review is aimed at discussing the electrode design/fabrication protocols of LSBs, especially the current problems on various sulfur-based cathodes (such as S, Li 2 S, Li 2 S x catholyte, organopolysulfides) and corresponding solutions. Different fabrication methods of sulfur-based cathodes are introduced and their corresponding bullet points to achieve high-quality cathodes are highlighted. In addition, the challenges and solutions of sulfur-based cathodes including active material content, mass loading, conductive agent/binder, compaction density, electrolyte/sulfur ratio, and current collector are summarized and rational strategies are refined to address these issues. Finally, the future prospects on sulfur-based cathodes and LSBs are proposed.

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Nitrogen-Doped Sponge Ni Fibers as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction

Abstract: HIGHLIGHTS • Freestanding N-doped sponge Ni micro/nanofibers exhibit a porous sponge structure. • An N-doping strategy is adopted to optimize the catalytic activity. • γ-NiOOH is identified as active phase by XPS and NEXAFS analyses.

Cited by 80 publications

References 48 publications

MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

Uniform Virus‐Like Co–N–Cs Electrocatalyst Derived from Prussian Blue Analog for Stretchable Fiber‐Shaped Zn–Air Batteries

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

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