Enhancing the Performance of Supercapacitor Activated Carbon Electrodes by Oxidation

Grishchenko, Liudmyla M.; Tsapyuk, G. G.; Riccò, Mauro; Diyuk, Vitaliy E.; Boldyrieva, Olga Yu.; Mariychuk, Ruslan; Matushko, Igor P.; Pontiroli, Daniele; Lisnyak, Vladyslav V.; Scaravonati, Silvio

doi:10.1109/elnano50318.2020.9088845

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…Our study showed the comparison of results obtained with the use of a Pd/ Al 2 O 3 oxidation catalyst and we found the effect of thermal dehydration. We should note that the effect of oxidation of carbonaceous layers, as in [29], plays a determining role in the Pd dispersing, but having also negative hydrophilization effect. It shows that under the present experimental conditions, the H 2 elimina-tion capacity of the catalyst was not affected by the produced water as the H 2 /O 2 recombination reaction continued.…”

Section: Resultsmentioning

confidence: 96%

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Baktygerey Zulkarnaevna

2023

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The article presents new research on the use of catalysts for H 2 /O 2 recombination. The study emphasizes the importance of ensuring safe production, storage, and utilization of green hydrogen by recombining gas leaks. We suggest the utilization of innovative palladium catalysts for low-temperature hydrogen oxidation. These catalysts leverage molecular oxygen from the air to efficiently recombine small amounts of leaked hydrogen, resulting in the production of water. Recombination catalysts with a small amount of dispersed palladium metal on an inert support are the most efficient for production to prevent the risks of hydrogen explosion and fire. This study is focused on the development of laboratory prototypes for the H 2 /O 2 recombination catalysts. We identified a potential catalytic system through monitoring of current literature to propose efficient hydrogen recombination catalysts. We present an optimized method for coating the surface of porous silicon nanoparticles with carbon layers, and introduce a technique for the production of supported palladium recombination catalysts. The proposed catalysts efficiently facilitate the recombination of hydrogen in lean air-hydrogen gas mixtures, offering a cost-effective alternative to more expensive commercial catalysts. Furthermore, they exhibit remarkable efficiency at both room and elevated temperatures. The final remarks underscore the necessity of creating new Pd catalysts to guarantee the secure storage and usage of hydrogen.

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Section: Resultsmentioning

confidence: 96%

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Baktygerey Zulkarnaevna

2023

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“…), and (v) formation of a composite electrode by insertion of polymers in the carbon substrate. 172 − 175 …”

Section: Different Applications Of Carbon-based Materialsmentioning

confidence: 99%

“…The different strategies employed to improve the electrochemical responses of the ACs include the following: (i) modification of the Fermi level position of the ACs via ultrasonic radiation treatment, (ii) AC surface modification by an oxidation process, (iii) incorporation of heteroatoms (S, O, N) in the spongy structure of activated carbon, (iv) development of a composite of AC with other carbon-based nanomaterials (e.g., CNTs, CNF, etc. ), and (v) formation of a composite electrode by insertion of polymers in the carbon substrate. − …”

Section: Different Applications Of Carbon-based Materialsmentioning

confidence: 99%

Conversion of Plastic Waste to Carbon-Based Compounds and Application in Energy Storage Devices

2022

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At present, plastic waste accumulation has been observed as one of the most alarming environmental challenges, affecting all forms of life, economy, and natural ecosystems, worldwide. The overproduction of plastic materials is mainly due to human population explosion as well as extraordinary proliferation in the global economy accompanied by global productivity. Under this threat, the development of benign and green alternative solutions instead of traditional disposal methods such as conversion of plastic waste materials into cherished carbonaceous nanomaterials such as carbon nanotubes (CNTs), carbon quantum dots (CQDs), graphene, activated carbon, and porous carbon is of utmost importance. This critical review thoroughly summarizes the different types of daily used plastics, their types, properties, ways of accumulation and their effect on the environment and human health, treatment of waste materials, conversion of waste materials into carbon-based compounds through different synthetic schemes, and their utilization in energy storage devices particularly in supercapacitors, as well as future perspectives. The main purpose of this review is to help the targeted audience to design their futuristic study in this desired field by providing information about the work done in the past few years.

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“…AC showed an appropriate pore volume and a narrow pore-size distribution that leads to having a large SSA more than 1672 m 2 •g −1 , the high specific capacitance of 210. The electrochemical performance of the ACs could be improved through different strategies such as the Fermi level position modification of the ACs using ultrasonic radiation [101], modification of the AC surface through oxidation process [102], doping sulfur and oxygen functionalities on the porous structure of ACs [103], fabricating a composite using ACs and other carbon nanomaterials (e.g., carbon nanotubes (CNTs) and carbon nanofibers (CNFs), etc.) [104], and inserting polymers into the carbon substrate to form composite electrodes [105,106].…”

Section: Activated Carbon Materials (Acs)mentioning

confidence: 99%

Electrode Materials for Supercapacitors: A Review of Recent Advances

2020

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The advanced electrochemical properties, such as high energy density, fast charge–discharge rates, excellent cyclic stability, and specific capacitance, make supercapacitor a fascinating electronic device. During recent decades, a significant amount of research has been dedicated to enhancing the electrochemical performance of the supercapacitors through the development of novel electrode materials. In addition to highlighting the charge storage mechanism of the three main categories of supercapacitors, including the electric double-layer capacitors (EDLCs), pseudocapacitors, and the hybrid supercapacitors, this review describes the insights of the recent electrode materials (including, carbon-based materials, metal oxide/hydroxide-based materials, and conducting polymer-based materials, 2D materials). The nanocomposites offer larger SSA, shorter ion/electron diffusion paths, thus improving the specific capacitance of supercapacitors (SCs). Besides, the incorporation of the redox-active small molecules and bio-derived functional groups displayed a significant effect on the electrochemical properties of electrode materials. These advanced properties provide a vast range of potential for the electrode materials to be utilized in different applications such as in wearable/portable/electronic devices such as all-solid-state supercapacitors, transparent/flexible supercapacitors, and asymmetric hybrid supercapacitors.

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Enhancing the Performance of Supercapacitor Activated Carbon Electrodes by Oxidation

Cited by 13 publications

References 20 publications

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Conversion of Plastic Waste to Carbon-Based Compounds and Application in Energy Storage Devices

Electrode Materials for Supercapacitors: A Review of Recent Advances

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