Scalable Fabrication of Nanoporous Carbon Fiber Films as Bifunctional Catalytic Electrodes for Flexible Zn‐Air Batteries

Liu, Qin; Wang, Yaobing; Dai, Liming; Yao, Jiannian

doi:10.1002/adma.201506112

Cited by 597 publications

(400 citation statements)

References 57 publications

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“…This free‐standing film demonstrated many advantages including high specific surface area of 1249 m 2 g −1 , electrical conductivity of 147 S m −1 , moderate tensile strength of 1.89 MPa and tensile modulus of 0.31 GPa. Importantly, this film also had a bifunctional catalytic activity for ORR (onset potential of 0.97 V and current density of 4.7 mA cm −2 ) and OER (onset potential of 1.43 V and potential of 1.84 V to achieve 10 mA cm −2 , Figure 6i) 167. Based on this extraordinary film, air electrode can be simply applied on primary liquid Zn–air battery, rechargeable liquid Zn–air battery and flexible all‐solid‐state rechargeable Zn–air battery, respectively.…”

Section: Rechargeable Zn–air Batteriesmentioning

confidence: 99%

Advanced Architectures and Relatives of Air Electrodes in Zn–Air Batteries

et al. 2018

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Zn–air batteries are becoming the promising power sources for portable and wearable electronic devices and hybrid/electric vehicles because of their high specific energy density and the low cost for next‐generation green and sustainable energy technologies. An air electrode integrated with an oxygen electrocatalyst is the most important component and inevitably determines the performance and cost of a Zn–air battery. This article presents exciting advances and challenges related to air electrodes and their relatives. After a brief introduction of the Zn–air battery, the architectures and oxygen electrocatalysts of air electrodes and relevant electrolytes are highlighted in primary and rechargeable types with different configurations, respectively. Moreover, the individual components and major issues of flexible Zn–air batteries are also highlighted, along with the strategies to enhance the battery performance. Finally, a perspective for design, preparation, and assembly of air electrodes is proposed for the future innovations of Zn–air batteries with high performance.

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Section: Rechargeable Zn–air Batteriesmentioning

confidence: 99%

Advanced Architectures and Relatives of Air Electrodes in Zn–Air Batteries

et al. 2018

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“…Being more electronegative than carbon, these heteroatoms make neighboring carbon atoms electron deficient, thereby promoting oxygen adsorption on the carbon nanostructure. [65,71] Recently, Wang et al reported the synthesis of hollow frameworks of N-doped carbon nanotubes (NCNTs) using ZIF-67 as precursor (Figure 8a). [72] Amazingly, during thermal treatment, the reductive H 2 atmosphere plays a critical role in the formation of CNTs.…”

Section: Heteroatom Dopingmentioning

confidence: 99%

Design of Efficient Bifunctional Oxygen Reduction/Evolution Electrocatalyst: Recent Advances and Perspectives

Huang

Wang

Peng

et al. 2017

Advanced Energy Materials

641

448

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Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the two most important reactions in rechargeable metal‐air battery, a promising technology to meet the energy requirements for various applications. The development of low‐cost, highly efficient and stable bifunctional ORR/OER catalysts is critical for a large‐scale application of this technology. In this review, the authors first introduce the fundamentals of bifunctional ORR/OER electrocatalysis in alkaline electrolyte. Various types of nanostructured materials as bifunctional ORR/OER catalysts including metal oxide, hydroxide and sulfide, functional carbon material, metal, and their composites are then reviewed. The crucial factors that can be used to tune the activity of the catalyst towards ORR/OER are summarized, including (1) phase, morphology, crystal facet, defect, mixed‐metal and strain engineering for metal oxide; (2) heteroatom doping, topological defects, and formation of metal‐N‐C structure for carbon material; (3) alloy effect for metal. These experiences lay the foundation for large scale application of metal‐air battery and can also effectively guide the rational design of catalysts for other electrocatalytic reactions.

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“…In this regard, Liu et al [184] prepared a nanoporous carbon nanofiber film as the air cathode in a liquid Zn-air battery and a flexible all-solid-state rechargeable Zn-air battery. The liquid Zn-air battery produced a maximum power density of 185 mW cm −2 , an energy density of 776 Wh kg −1 , a small voltage gap of 0.73 V at 10 mA cm −2 , and an excellent stability of up to 500 cycles.…”

Section: Carbon-based Bifunctional Catalysts For Zn-air Batteriesmentioning

confidence: 99%

Carbon-Based Metal-Free Electrocatalysis for Energy Conversion, Energy Storage, and Environmental Protection

Xiao

Zou

et al. 2018

Electrochem. Energ. Rev.

Self Cite

157

103

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Carbon-based metal-free catalysts possess desirable properties such as high earth abundance, low cost, high electrical conductivity, structural tunability, good selectivity, strong stability in acidic/alkaline conditions, and environmental friendliness. Because of these properties, these catalysts have recently received increasing attention in energy and environmental applications. Subsequently, various carbon-based electrocatalysts have been developed to replace noble metal catalysts for low-cost renewable generation and storage of clean energy and environmental protection through metal-free electrocatalysis. This article provides an up-to-date review of this rapidly developing field by critically assessing recent advances in the mechanistic understanding, structure design, and material/device fabrication of metal-free carbon-based electrocatalysts for clean energy conversion/storage and environmental protection, along with discussions on current challenges and perspectives. Graphical AbstractKeywords Metal-free electrocatalysis · Carbon-based catalysts · Energy conversion and storage · Environmental protection

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Scalable Fabrication of Nanoporous Carbon Fiber Films as Bifunctional Catalytic Electrodes for Flexible Zn‐Air Batteries

Cited by 597 publications

References 57 publications

Advanced Architectures and Relatives of Air Electrodes in Zn–Air Batteries

Advanced Architectures and Relatives of Air Electrodes in Zn–Air Batteries

Design of Efficient Bifunctional Oxygen Reduction/Evolution Electrocatalyst: Recent Advances and Perspectives

Carbon-Based Metal-Free Electrocatalysis for Energy Conversion, Energy Storage, and Environmental Protection

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