Bifunctional oxygen electrodes of homogeneous Co4N nanocrystals@N-doped carbon hybrids for rechargeable Zn-air batteries

Chen, Lulu; Zhang, Yelong; Liu, Xiangjian; Long, Ling; Wang, Siyu; Xu, Xiaolong; Liu, Minchao; Yang, Wenxiu; Jia, Jianbo

doi:10.1016/j.carbon.2019.05.063

Cited by 71 publications

(28 citation statements)

References 30 publications

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“…As illustrated in Fig. 2D and F, the uniform distributions of C and N image revealed the homogeneous embedded N atoms into the carbon framework 25 . Meanwhile, the high dispersion of Co also was proven by Fig.…”

Section: Resultsmentioning

confidence: 85%

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

et al. 2022

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Section: Resultsmentioning

confidence: 85%

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

et al. 2022

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“…15‐0806). [ 24,25 ] This binary mixing state was further investigated by X‐ray photoelectron spectra (XPS). It was not difficult to see from Figure S2a in the Supporting Information that the Co 2p 3/2 orbit could be separated into three peaks, indicating Co existed in more than one chemical state.…”

Section: Resultsmentioning

confidence: 99%

CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

Pu¹,

Gong

Shen³

et al. 2021

Advanced Science

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The "shuttle effect" of soluble polysulfides and slow reaction kinetics hinder the practical application of Li-S batteries. Transition metal oxides are promising mediators to alleviate these problems, but the poor electrical conductivity limits their further development. Herein, the homogeneous CoNiO 2 /Co 4 N nanowires have been fabricated and employed as additive of graphene based sulfur cathode. Through optimizing the nitriding degree, the continuous heterostructure interface can be obtained, accompanied by effective adjustment of energy band structure. By combining the strong adsorptive and catalytic properties of CoNiO 2 and electrical conductivity of Co 4 N, the in situ formed CoNiO 2 /Co 4 N heterostructure reveals a synergistic enhancement effect. Theoretical calculation and experimental design show that it can not only significantly inhibit "shuttle effect" through chemisorption and catalytic conversion of polysulfides, but also improve the transport rate of ions and electrons. Thus, the graphene composite sulfur cathode supported by these CoNiO 2 /Co 4 N nanowires exhibits improved sulfur species reaction kinetics. The corresponding cell provides a high rate capacity of 688 mAh g −1 at 4 C with an ultralow decaying rate of ≈0.07% per cycle over 600 cycles. The design of heterostructure nanowires and graphene composite structure provides an advanced strategy for the rapid capture-diffusion-conversion process of polysulfides.

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“…[ 215 ] Actually, the doping of N into the crystal lattice of transition metals imposed strong bond with metal atoms, endowing metal‐like features and eventually promoted the electrical conductivities and stabilities. [ 216 ] Again, ZIFs are promising precursor for the synthesis of Co 4 N and it develops a synergistic effect with 3D porous structures of carbon, leading to the favorable electroactivity for Zn–air batteries. For instance, Ge et al.…”

Section: Recent Advances Of Zif‐derived Electrocatalysts As Air Electmentioning

confidence: 99%

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Arafat

Azhar

Zhong

et al. 2021

Advanced Energy Materials

154

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The fast growth in human population and the quick cultural advancement of human society leads to the tremendous increase in energy demand. [1] During the past, fossil fuels were used as the main energy sources, while their excessive use based on the conventional combustion technology releases excessive greenhouse gases into the environment, causing adverse impact on the sustainability of ecosystem. To cope with the challenges of stringent environmental legislations and the reliance on fossil fuels, renewable Secondary Zn-air batteries (ZABs) are recognized as one of the most promising power sources for the future with lucrative features of low cost, high energy density, eco-friendliness, and high safety. However, the widespread implementation of ZABs is still hampered by the sluggish oxygen redox reactions. Thus the deployment of cost-effective and highly efficient air electrodes to substitute precious metals (Pt/Ir), is highly challenging, however, highly desired. Zeolitic imidazolate frameworks (ZIFs) are emerging functional materials, which demonstrate several outstanding characteristics, such as high specific surface area, high conductivity, self-doped N, open pore structure, versatile compositions and favourable chemical stability. Through varying the metal/organic moiety or by employing different synthesis protocols, ZIFs with different properties could be obtained. Being adaptable, desired functionalities may be further incorporated into ZIFs through pre-treatment, in situ treatment, and post treatment. Thus, ZIFs are the ideal precursors for the preparation of variety of bi-functional air electrodes for ZABs by materials tuning, morphological control, or by materials hybridization. Here, the recent advances of ZIFs-based materials are critically surveyed from the perspective of synthesis, morphology, structure and properties, and correlated with performance indicators of ZABs. Finally, the major challenges and future prospects of ZIFs associated with ZABs are discussed.

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Bifunctional oxygen electrodes of homogeneous Co4N nanocrystals@N-doped carbon hybrids for rechargeable Zn-air batteries

Cited by 71 publications

References 30 publications

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

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Bifunctional oxygen electrodes of homogeneous Co4N nanocrystals@N-doped carbon hybrids for rechargeable Zn-air batteries

Cited by 71 publications

References 30 publications

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

Atomically dispersed Co–N–C electrocatalysts synthesized by a low-speed ball milling method for proton exchange membrane fuel cells

CoNiO2/Co4N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

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CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries