Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Olena Okhay"'
Autor:
Alexander Tkach, Olena Okhay
Publikováno v:
Nanomaterials, Vol 13, Iss 22, p 2912 (2023)
In recent years, the worldwide research in the field of energy harvesting and storage has focused on the development of clean and sustainable methods that can respond to the rising energy demands of humankind [...]
Externí odkaz:
https://doaj.org/article/5d19ed400ded4abfb6b8362a2c2ab1fb
Publikováno v:
C, Vol 9, Iss 4, p 93 (2023)
The aim of this work is to study the properties of carbon materials prepared from apricot stones by carbonization at 300–900 °C and chemical activation by KOH with different ratios between components. It was found that increasing the carbonization
Externí odkaz:
https://doaj.org/article/d05eb3215c28460eb38565c1ca6bce6c
Autor:
Olena Okhay, Alexander Tkach
Publikováno v:
Nanomaterials, Vol 13, Iss 6, p 988 (2023)
Harvesting ambient mechanical energy at the nanometric scale holds great promise for powering small electronics and achieving self-powered electronic devices. The current review is focused on kinetic energy harvesters, particularly on flexible piezoe
Externí odkaz:
https://doaj.org/article/44c7fe4f1a7b442693aead41b89f8681
Autor:
Olena Okhay, Alexander Tkach
Publikováno v:
Batteries, Vol 8, Iss 10, p 191 (2022)
Both polyaniline (PANI) and graphene are widely studied for their application as capacitive electrodes in energy storage devices. However, although PANI can be easy synthesized, is of low cost and has a higher specific capacitance than graphene, pris
Externí odkaz:
https://doaj.org/article/e3048f47a7104f25aa3946d632260199
Autor:
Olena Okhay, Alexander Tkach
Publikováno v:
Nanomaterials, Vol 12, Iss 15, p 2531 (2022)
The current development of clean and high efficiency energy sources such as solar or wind energy sources has to be supported by the design and fabrication of energy storage systems. Electrochemical capacitors (or supercapacitors (SCs)) are promising
Externí odkaz:
https://doaj.org/article/dbf75798903f4076a06e90a63aa04291
Publikováno v:
C, Vol 8, Iss 1, p 12 (2022)
Electrode materials for electrochemical capacitors or supercapacitors (SCs) are widely studied, as they are needed for the development of energy storage devices in electrical vehicles and flexible electronics. In the current work, a self-supported pa
Externí odkaz:
https://doaj.org/article/fa57949793a04f2ab3dceded2acfb9c3
Autor:
Olena Okhay, Alexander Tkach
Publikováno v:
Nanomaterials, Vol 11, Iss 5, p 1240 (2021)
Thanks to the advanced technologies for energy generation such as solar cells and thermo- or piezo-generators the amount of electricity transformed from light, heat or mechanical pressure sources can be significantly enhanced. However, there is still
Externí odkaz:
https://doaj.org/article/d92981fa122b4e68ae4ccffc13234289
Autor:
Olena Okhay, Alexander Tkach
Publikováno v:
C, Vol 7, Iss 2, p 37 (2021)
In recent years, worldwide research has been focused on clean and sustainable energy sources that can respond to the exponentially rising energy demands of humankind. The harvesting of unused heat in relation to automotive exhaustion, industrial proc
Externí odkaz:
https://doaj.org/article/b8d0406ba5114067aaef3a93bf301492
Autor:
Alexander Tkach, André Santos, Sebastian Zlotnik, Ricardo Serrazina, Olena Okhay, Igor Bdikin, Maria Elisabete Costa, Paula M. Vilarinho
Publikováno v:
Nanomaterials, Vol 9, Iss 11, p 1600 (2019)
If piezoelectric micro-devices based on K0.5Na0.5NbO3 (KNN) thin films are to achieve commercialization, it is critical to optimize the films’ performance using low-cost scalable processing conditions. Here, sol−gel derived KNN thin films are dep
Externí odkaz:
https://doaj.org/article/82dca20b4e324fc39da37d6f6bcc6e07
Autor:
Alexander Tkach, Olena Okhay, André Santos, Sebastian Zlotnik, Ricardo Serrazina, Paula M. Vilarinho, M. Elisabete Costa
Publikováno v:
Lecture Notes in Mechanical Engineering ISBN: 9789811361326
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5daaf3399618cb039a5edd1ebaf1aad
https://doi.org/10.1007/978-981-13-6133-3_38
https://doi.org/10.1007/978-981-13-6133-3_38
