Enhanced performance and durability of composite bipolar plate with surface modification of cactus-like carbon nanofibers

Jiang, Fengjing; Liao, Weineng; Ayukawa, Tsubasa; Yoon, Seong Ho; Nakabayashi, Koji; Miyawaki, Jin

doi:10.1016/j.jpowsour.2020.228903

Cited by 33 publications

(31 citation statements)

References 28 publications

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“…Here, 0.3440 and 0.3354 (in nm) are the interlayer spacing of completely nongraphitized and ideal graphite crystallite. 81 The graphitization process tends to increase the average crystallite size along with reducing d 002 to the theoretical value of 0.3354 nm for graphite. The XRD patterns show a diffraction peak centered at 26°that corresponds to the (002) crystal plane (Figure 5a).…”

Section: ■ Introductionmentioning

confidence: 94%

“…56,83,88 In order to evaluate the degree of graphitization, X-ray diffraction (XRD) and Raman spectroscopies have been employed, wherein XRD helped to determine the orders of graphitic structures in CNFs through average values of interlayer spacings (d 002 ) (estimated by (002) peak position), crystallite sizes, and orientations of the planes. 81,92,93 Degree of graphitization (in %) can be evaluated from eq 1 Degree of graphitization 0.3440 d 0.3440 0.3354 100…”

Section: ■ Introductionmentioning

confidence: 99%

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Versatile Graphitized Carbon Nanofibers in Energy Applications

Sharma

Basu

Shetti

et al. 2022

ACS Sustainable Chem. Eng.

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Graphitized carbon nanofibers (CNFs) are the allotropic forms of carbon that offer exceptional electrical conductivity, high aspect ratio, large surface-to-volume ratio, flexibility, mechanical robustness, and structural stability. These properties render CNFs as useful materials in energy applications, including water electrocatalysis and electrochemical energy storage devices (EESDs). Graphitized CNFs manifest huge versatility in EESDs and have been employed as electrode materials, as supports for other electrode materials, and conductive additives. This perspective summarizes the production methods, structural aspects, and energy applications of graphitized CNFs. Different design strategies have been employed to produce CNFs with diverse and distinct morphologies and structures. Their fabrication methods, along with precursors and dopants or cocatalysts, impact the overall structural, functional, and topographical properties. Recent developments on the state-of-the-art interests of graphitic CNFs in lithium-ion batteries (LIBs), lithium−sulfur (Li−S) batteries, vanadium redox flow batteries (VRFBs), supercapacitors, and water splitting have explored the many possibilities in energy sectors. The assembly and functioning of CNFs in water splitting and EESDs as well as primary challenges are discussed in this perspective.

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Section: ■ Introductionmentioning

confidence: 94%

Section: ■ Introductionmentioning

confidence: 99%

Versatile Graphitized Carbon Nanofibers in Energy Applications

Sharma

Basu

Shetti

et al. 2022

ACS Sustainable Chem. Eng.

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“…81% EE at 140 mA cm −2 with these bipolar plates [93]. Jiang et al [95] proposed a way to exclude the layer of resin on the surface of composite bipolar plates by using a surface treatment that grows cactus-like carbon nanofibers from catalyst cores. This technique resulted in an EE of ca.…”

Section: Inorganic Aqueousmentioning

confidence: 99%

Redox Flow Batteries: Materials, Design and Prospects

et al. 2021

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The implementation of renewable energy sources is rapidly growing in the electrical sector. This is a major step for civilization since it will reduce the carbon footprint and ensure a sustainable future. Nevertheless, these sources of energy are far from perfect and require complementary technologies to ensure dispatchable energy and this requires storage. In the last few decades, redox flow batteries (RFB) have been revealed to be an interesting alternative for this application, mainly due to their versatility and scalability. This technology has been the focus of intense research and great advances in the last decade. This review aims to summarize the most relevant advances achieved in the last few years, i.e., from 2015 until the middle of 2021. A synopsis of the different types of RFB technology will be conducted. Particular attention will be given to vanadium redox flow batteries (VRFB), the most mature RFB technology, but also to the emerging most promising chemistries. An in-depth review will be performed regarding the main innovations, materials, and designs. The main drawbacks and future perspectives for this technology will also be addressed.

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“…Metal BPs have a higher mechanical strength, good air permeability, electrical conductivity, and are easier to process than graphite BPs; however, in order to prevent metal BPs from corroding in the operating environment of a PEMFC, a more expensive surface treatment and modification is required [10,11]. Resin/graphite composite BPs have many advantages such as their light weight, easy Energies 2022, 15, 4979 2 of 16 fabricability, corrosion resistance, inexpensiveness, etc., but their electrical conductivity and contact resistance are lower than graphite BPs [12][13][14]. Recently, the composite BPs have aroused extensive research interest because of their higher corrosion resistance and easier fabricability.…”

Section: Introductionmentioning

confidence: 99%

A High Conductive Composite Bipolar Plate with Conductive Network Constructed by Chemical Vapor Deposition

Zeng

Peng

et al. 2022

Energies

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In this study, a highly conductive composite bipolar plate with an embedded conductive carbon nanofiber network was prepared by chemical vapor deposition, and a conductive network was constructed inside the composite bipolar plate. The latter network was then compared with a conductive network formed by directly adding carbon nanotubes more evenly distributed. The optimum preparation methods of vapor-grown carbon fibers and the fiber content were analyzed, and the specific surface area and porosity of the bipolar plates were measured and analyzed using a BET test. The results show that the carbon nanofibers prepared under the conditions of 700 °C and a content of 2% exhibited the best effect on improving the performance of the bipolar plates. The conductivity of the prepared bipolar plates could reach 255.2 S/cm, which is 22.1% higher than treatment with multi-walled carbon nanotubes. The bending strength of the prepared bipolar plates was 47.92 MPa, and the interface contact resistance was 6.24 mΩ·cm2. In conclusion, the bipolar plates modified with vapor-grown carbon fibers were a promising kind of material for proton exchange membrane fuel cells.

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Enhanced performance and durability of composite bipolar plate with surface modification of cactus-like carbon nanofibers

Cited by 33 publications

References 28 publications

Versatile Graphitized Carbon Nanofibers in Energy Applications

Versatile Graphitized Carbon Nanofibers in Energy Applications

Redox Flow Batteries: Materials, Design and Prospects

A High Conductive Composite Bipolar Plate with Conductive Network Constructed by Chemical Vapor Deposition

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