Pt/Fe/Ni decorated CVD grown CNTs on carbon paper as electrocatalytic electrodes in polymer fuel cells: An investigation on H2 gas on the growth of CNTs and reduction of electrocatalysts

Litkohi, Hajar Rajaei; Bahari, Ali; Gatabi, Maliheh Pashai

doi:10.1016/j.diamond.2021.108534

Cited by 10 publications

(7 citation statements)

References 56 publications

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“…The 1635 cm −1 resonance originates from a C=C stretching. 61 These peaks can be observed in all samples and in the fresh carbon paper (Fig. S-6).…”

Section: Resultsmentioning

confidence: 83%

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The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries

Policano

Anchieta

Nepel

et al. 2023

J. Electrochem. Soc.

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Storing larger amounts of energy is becoming critical as more renewable and intermittent energy sources emerge in our society. Li-O2 batteries have the highest theoretical energy density, but there are still barriers to overcome. The presence of water in atmospheric air makes studying its effects on battery performance necessary if ambient oxygen is to be used in such devices. This paper investigates the effect of different water concentrations in the electrolyte of Li-O2 aprotic batteries, on deep discharge capacity and cyclability. Batteries were prepared with a metallic lithium anode, glass microfiber membrane, 0.1 M LiClO4/DMSO electrolyte with various water concentrations (15-144,000 ppm), and carbon paper cathode. An increase in discharge capacity of >300% was achieved with 550 ppm of water; however, a gradual reduction in cyclability was observed increasing water concentration. We show that this occurs due to changes in the reaction mechanism, composition and morphology of the discharge products, incomplete decomposition, and formation of a passivating film on the metallic lithium anode. In addition, we elucidate the causes underlying the involved mechanism and highlights the double-edged effect of water on the electrochemical performance of Li-O2 batteries, causing improvements in deep discharge capacity at the cost of reduced cyclability.

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“…The 1635 cm −1 resonance originates from a C=C stretching. 61 These peaks can be observed in all samples and in the fresh carbon paper (Fig. S-6).…”

Section: Resultsmentioning

confidence: 83%

“…S-6. All spectra were normalized (divided) by the absorption value of the most intense carbon paper peak at 3440 cm −1 , 60,61 which is assigned to OH stretching vibrations of moisture. The peaks at 2930 and 2850 cm −1 60,61 are attributed to stretching vibrations of the CH bonds and can be seen in all samples (Fig.…”

Section: Resultsmentioning

confidence: 99%

The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries

Policano

Anchieta

Nepel

et al. 2023

J. Electrochem. Soc.

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“…Zhang et al, 2022). In contrast with ink-loading methods, the as-prepared freestanding electrodes will be able to (Litkohi et al, 2021a; T. Wang et al, 2018). Aside from the electrical conductivity of the base substrate, factors such as electrocatalyst adhesion, ion diffusion and charge-transfer resistance of the fabricated electrode could potentially influence the HER performance (W. .…”

Section: Her Electrode Fabricationmentioning

confidence: 99%

“…Specifically, CNTs exhibit excellent electrical and mechanical properties, corrosion resistance and high surface area (Litkohi et al, 2021b;Mir et al, 2020b;K. A. Shah & Tali, 2016a;Veksha et al, 2020).…”

Section: Hydrogen Evolution Reaction (Her)mentioning

confidence: 99%

“…CVD enables the direct creation of a freestanding working electrode without the need for binders. In contrast to ink-loading approaches, in-situ fabrication has the potential to (i) enhance electron transfer characteristics and (ii) diminish contact resistance between CNTs and the substrate at the CNT/substrate interface (Litkohi et al, 2021a;T. Wang et al, 2018).…”

Section: Conventional Lab-based Techniques For Producing Her Electrod...mentioning

confidence: 99%

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Plastic-derived substrate-grown carbon nanotubes as freestanding electrode for hydrogen evolution in alkaline media

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Polyolefin-derived substrate-grown carbon nanotubes as binder-free electrode for hydrogen evolution in alkaline media

Wu,

Tu,

Veksha

et al. 2024

Chemosphere

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Pt/Fe/Ni decorated CVD grown CNTs on carbon paper as electrocatalytic electrodes in polymer fuel cells: An investigation on H2 gas on the growth of CNTs and reduction of electrocatalysts

Cited by 10 publications

References 56 publications

The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries

The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries

Plastic-derived substrate-grown carbon nanotubes as freestanding electrode for hydrogen evolution in alkaline media

Polyolefin-derived substrate-grown carbon nanotubes as binder-free electrode for hydrogen evolution in alkaline media

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Pt/Fe/Ni decorated CVD grown CNTs on carbon paper as electrocatalytic electrodes in polymer fuel cells: An investigation on H2 gas on the growth of CNTs and reduction of electrocatalysts

Cited by 10 publications

References 56 publications

The Double-Edged Effect of Water on Li-O2 Aprotic Batteries

The Double-Edged Effect of Water on Li-O2 Aprotic Batteries

Plastic-derived substrate-grown carbon nanotubes as freestanding electrode for hydrogen evolution in alkaline media

Polyolefin-derived substrate-grown carbon nanotubes as binder-free electrode for hydrogen evolution in alkaline media

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Product

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The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries

The Double-Edged Effect of Water on Li-O₂ Aprotic Batteries