Engineering the multiscale structure of bifunctional oxygen electrocatalyst for highly efficient and ultrastable zinc-air battery

Chen, Chang; Cheng, Dan; Liu, Shoujie; Wang, Zhe; Hu, Mingzhen; Zhou, Kebin

doi:10.1016/j.ensm.2019.07.028

Cited by 52 publications

(34 citation statements)

References 55 publications

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“…Figure 6B displays discharge and charge polarization curves of the rechargeable Zn‐air battery using the Fe x Ni y N@C/NC catalyst as the air electrode. It reveals that the Fe x Ni y N@C/NC exhibited a smaller voltage gap between charge and discharge than that of reported for Pt/C + RuO 2 , which means higher energy efficiency and better rechargeable ability 39 . The discharge‐charge voltage gap at 60 mA/cm 2 is only 0.93 V, contributing to an energy efficiency of 54.0% (Figure S12).…”

Section: Resultsmentioning

confidence: 85%

Graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals on biomass‐derived N‐doped carbon as an efficient electrocatalyst for rechargeable Zn‐air battery

Zhang

et al. 2020

Carbon Energy

101

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Oxygen reduction/evolution reactions (ORR/OERs) catalysts play a key role in the metal‐air battery and water‐splitting process. Herein, we developed a facile template‐free method to fabricate a new type of non–noble metal‐based hybrid catalyst which consists of binary FeNi alloy/nitride nanocrystals with graphitic‐shell and biomass‐derived N‐doped carbon (NC) (FexNiyN@C/NC). This novel nanostructure exhibits superior performance for ORR/OER, which can be attributed to the strong interactions between the graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals and the N‐doped porous carbon substrate. The X‐ray absorption spectroscopy technique was employed to reveal the underlying mechanisms for the excellent performance. The assembled Zn‐air battery device exhibits outstanding charging/discharging performance and cycling stability, indicating the great potential of this type of novel catalysts.

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Section: Resultsmentioning

confidence: 85%

Graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals on biomass‐derived N‐doped carbon as an efficient electrocatalyst for rechargeable Zn‐air battery

Zhang

et al. 2020

Carbon Energy

101

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“…From a practical point of view, the significance of ORR is that the oxygen redox reaction is the core process and the bottleneck of many energy storage or conversion devices such as fuel cells and metal–air batteries [46] . For improving the performance of these devices, high‐active ORR electrocatalysts are therefore urgently needed [47] . As a demonstration, developing a noble‐metal‐free ORR electrocatalyst comparable to or exceeding the current Pt‐based electrocatalyst is of great importance to fuel cells [48] .…”

Section: Center Metal Atomsmentioning

confidence: 99%

Intrinsic Electrocatalytic Activity Regulation of M–N–C Single‐Atom Catalysts for the Oxygen Reduction Reaction

et al. 2020

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Single‐atom catalysts (SACs) with highly active sites atomically dispersed on substrates exhibit unique advantages regarding maximum atomic efficiency, abundant chemical structures, and extraordinary catalytic performances for multiple important reactions. In particular, M–N–C SACs (M=transition metal atom) demonstrate optimal electrocatalytic activity for the oxygen reduction reaction (ORR) and have attracted extensive attention recently. Despite substantial efforts in fabricating various M–N–C SACs, the principles for regulating the intrinsic electrocatalytic activity of their active sites have not been sufficiently studied. In this Review, we summarize the regulation strategies for promoting the intrinsic electrocatalytic ORR activity of M–N–C SACs by modulation of the center metal atoms, the coordinated atoms, the environmental atoms, and the guest groups. Theoretical calculations and experimental investigations are both included to afford a comprehensive understanding of the structure–performance relationship. Finally, future directions of developing advanced M–N–C SACs for electrocatalytic ORR and other analogous reactions are proposed.

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“…[126] On account of the sluggish kinetics of OER and ORR, the development of the efficient and cost-effective catalysts has become one of the most urgent requirements for aqueous metal-air batteries. [38,48,125,[143][144][145][146][147][148][149] Hu et al reported an active site-designed ternary spinel oxides with bifunctional electrocatalysts, M 0.1 Ni 0.9 Co 2 O 4 (M: Mn, Fe, Cu, Zn), used as the air electrode for aqueous zinc-air batteries. According to the X-ray photoelectron spectroscopy (XPS), Fe-doped NiCo 2 O 4 (Fe 0.1 Ni 0.9 Co 2 O 4 ) provided the highest Co 2+ /Co 3+ ratio and the lowest Ni 2+ /Ni 3+ ratio, resulting in improving electrocatalytic activities toward both the OER and ORR in alkaline electrolytes from rotating ring disk voltammograms.…”

Section: (20 Of 30)mentioning

confidence: 99%

Intrinsic Structure Modification of Electrode Materials for Aqueous Metal‐Ion and Metal‐Air Batteries

Ling

Wang

Chen

et al. 2020

Adv Funct Materials

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In consideration of low cost, simple operation, safe reliability, and environmental benignity, aqueous rechargeable batteries (ARBs) have attracted great interest among portable electronic devices, energy storage, and power source batteries. As the key components of ARBs, the electrode materials lead to a crucial effect for the overall battery properties, such as working voltage, electrocatalytic activity, capacity, and cycling stability. However, owing to the highly reactive aqueous environment, the electrode materials typically demonstrate a series of issues, including active material dissolution, structural instability, and poor catalytic activity, restricting their application. So far, several researchers have devoted much effort to improve the properties of electrode materials for ARBs. In particular, intrinsic structure modification in terms of vacancy regulation, interlayer engineering, and element doping have been applied to optimize the electronic and phase structure of electrode materials, contributing to elevated ion diffusion, fast charge transfer, and adequate active sites for electrochemical reaction. In this review, recent reports are demonstrated about the intrinsic structure modification of electrode materials in aqueous metal‐ion and metal‐air batteries, focusing on various regulation strategies and functional mechanisms. Finally, a brief conclusion and perspective is presented to demonstrate constructive suggestions and opinions for further research.

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Engineering the multiscale structure of bifunctional oxygen electrocatalyst for highly efficient and ultrastable zinc-air battery

Cited by 52 publications

References 55 publications

Graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals on biomass‐derived N‐doped carbon as an efficient electrocatalyst for rechargeable Zn‐air battery

Graphitic‐shell encapsulated FeNi alloy/nitride nanocrystals on biomass‐derived N‐doped carbon as an efficient electrocatalyst for rechargeable Zn‐air battery

Intrinsic Electrocatalytic Activity Regulation of M–N–C Single‐Atom Catalysts for the Oxygen Reduction Reaction

Intrinsic Structure Modification of Electrode Materials for Aqueous Metal‐Ion and Metal‐Air Batteries

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