Insitute of Electrochemistry and Energy Systems, BAS

Sustainable energy sources are the key for the future economic, secure and ecology-oriented worldwide progress

Among the major challenges that need to be overcome are energy-related issues such as development of “green” energy sources, increased efficiency, conversion and storage.

The renewable sources of energy (photovoltaics, wind and water turbines) are ecologically benign but they have a major drawback, i.e. the dependence of cyclic (day/night) and climatic (clouds, wind current and sea waves) factors for the production of electricity. Here comes a back-up solution to solve this issue such as a system of battery and supercapacitors (supercap). The surplus electricity produced by the respective devise during the day or windy period is stored in battery/supercapacitor and it is delivered to the power grid when necessary (night, clouds). Moreover, there is a significant demand increase of energy for portable devices and especially for transportation, aiming to reduce the greenhouse gases in the atmosphere.

A quick twofold response by improving the existing and developing of new technologies in the energy field for overcoming above mentioned issues is needed. The nature and form of the novel put-in materials could be the base for the both approaches.

Projects Information

Multigraph FUNDING

Bulgarian National Science Fund (BNSF),
Ministry of Education and Science, Republic of Bulgaria
Competition for financial support of basic research projects
on social challenges (2018-2021),
contract No. КП-06-ОПР 04/2
Ministry of Education and Science, Republic of Bulgaria


Graphene has remarkable electrical conductivity, chemical stability and a unique zero band gap structure allowing wide light spectrum absorption. Nevertheless, its light absorbing ability is very low which may be overcomed by attachment of highly absorbing compounds


Quantum dots: In the nanoworld below ≤ 10 nm, materials which, have the same chemical composition but differ by particle size, exhibit different optical properties – absorption, fluorescence and emission. The small particle size may also contribute for shorter ion difusion paths

Outline and Motivation