Registration Number
0223U001954,
0121U108649
, R & D reports
Title
Effective thin-film gas sensors based on compounds of group АIIВVI
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Head
Kashuba Andrii І., Кандидат фізико-математичних наук
Registration Date
06-02-2023
Organization
Lviv Polytechnic National University
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Surface morphology and elemental composition of porous carbon materials CSTR-08 and CSTR-36B were studied. The densities of carbon materials were obtained, which are ρ = 0.12 g/cm3 for CSTR-08 and ρ = 0.43 g/cm3 for CSTR-36B.
The prevailing pore size for carbon materials is established. For the studied porous materials, the values of the Porod constant Kr, the Porod invariant, and the specific surface area of the pores of the material, which are Kp = 28,0 Å-4, Qp = 470 Å-3, S = 1875 m2/g for CSTR-08 and Kp = 98,3 Å-4, Qp = 1980 Å-3, S = 1560 m2/g CSTR-36B. The porosity of carbon materials CSTR-08 – w = 0.95 and CSTR-36B – w = 0.83 was established.
The method of manufacturing elementary electrochemical cells with various binding components and electrolyte types has been developed. The physicochemical properties of electrochemical cells were determined. Calculated specific capacitance values of 136 F/g for sample CSTR-08 and 125 F/g for CSTR-36 in KOH and 68 F/g and 101 F/g, respectively, for the same samples but in [C2H5]4NBF4 in acetonitrile. A study of the frequency dependences of the complex impedance of CSTR-08 and CSTR-36 materials in aqueous and organic electrolytes was carried out.
The samples were modified with FeCl3 solution. The porosity of CSTR-08 modified FeCl3 carbon materials was determined to be w = 0.81.
Based on the conducted studies of galvanostatic charge–discharge curves, the values of the specific capacity of the FeCl3-modified CSTR-08 sample were calculated, amounting to 196.29 F/g. A study of the frequency dependencies of the complex impedance of the FeCl3-modified CSTR-08 sample was conducted.
Electrochemical characteristics were determined by the method of cycling (charge/discharge) in the galvanostatic mode for electrochemical cells. Batteries of capacitors with a voltage of 5 V with different connections were formed: two consecutive links of cells; four cells connected in series. The degree of battery imbalance under different conditions o
Product Description
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Guminilovych Ruslana
Kashuba Natalia
Kovalenko Mariia
Kunyo Vasyl
Maly Taras
Pershyna Sofiya
Rudysh Myron
Semkiv Ihor
Storozhuk Yaroslav
Shyshkovskyi Serhii
Shchepanskyi Pavlo
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2023-02-06
