Modified carbon materials for energy storage application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10251882" target="_blank" >RIV/61989100:27360/22:10251882 - isvavai.cz</a>

Result on the web

<a href="https://atomdec.info/intsymp-2" target="_blank" >https://atomdec.info/intsymp-2</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Modified carbon materials for energy storage application

Original language description

nterest in the application that requires high energy density like consumer portable electronicdevices, energy back-up systems, hybrid vehicles has led research towards low-cost, high-performance and environmentally friendly device called &quot;Supercapacitors&quot;. Supercapacitors canstore and deliver energy by simply utilizing the charge separation at the electrode-electrolyteinterface. The thin electrolyte film and high surface areas of electrode materials significantlycontribute to the high capacitance of the device. Power densities of supercapacitors are thousandtimes higher than those of lithium ion batteries, along with much larger energy density values ascompared to conventional capacitors. The construction of supercapacitor is same as that of tradi-tional capacitors, the difference is that the metal electrodes are replaced by highly porous elec-trodes. Depending upon the charge storage mechanism and the active material used, superca-pacitors are divided into two classes: electrical double layer capacitors (EDLCs) and pseudoca-pacitors [1-2]Variety of carbon-derived materials have been intensively studied as electrode materials forsupercapacitors because of their quality to transformed into various forms to facilitate high sur-face area, excellent electrical conductivity and high energy capacity. While choosing the materi-als, the most important factors affecting the performance of EDLCs are the specific surface areaand pore size distribution of the material. The maximum capacitance is achieved when the poresize of the electrode material is close to the size of electrolyte ions so that ions of the electrolytecan access more area of the electroactive material. Activated carbon has been chosen in the pre-sent studies because of its cost effectiveness and good processability. It is inexpensive as com-pared to other competing materials [3]. In the present studies, activated carbon was modifiedwith silver nanoparticles, the introduction of silver nanoparticles helps in improving the per-formance by decreasing the polarization.For electrolyte, gel polymer electrolyte (GPE) is attracting a lot of attention because of theirflexibility, high ionic conductivity, leakage free and stable electrochemical performance. Gener-ally, GPEs are composed of electrolyte salt which can provide electrolyte ions and polymericmaterial which act as a matrix and its designing helps to improve the electrochemical and ca-pacitive performance of the devices [4]. In the present case, Poly(vinylidene fluoride-co-hexafluoropropylene) was used as a polymer, propylene carbonate as a plasticizer and magne-sium perchlorate as a salt.The supercapacitor cells were fabricated by using two-electrode system, in which electrolytefilms were sandwiched in between activated carbon modified with silver nanoparticle elec-trodes. It has been found out that 3wt% of silver particle in activated carbon gave best electro-chemical results and hereon refers as ACAg3

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů