Using tanned leather waste to derive biochars for supercapacitor electrodes in various electrolytes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10491979" target="_blank" >RIV/00216208:11320/24:10491979 - isvavai.cz</a>
Alternative codes found
RIV/70883521:28610/24:63582399 RIV/61989100:27710/24:10256905 RIV/60461373:22810/24:43930178
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=f838IVKi9v" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=f838IVKi9v</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s13399-024-06348-w" target="_blank" >10.1007/s13399-024-06348-w</a>
Alternative languages
Result language
angličtina
Original language name
Using tanned leather waste to derive biochars for supercapacitor electrodes in various electrolytes
Original language description
Chromium-tanned pigskin leather was carbonized in three ways: (1) pyrolysis in an inert atmosphere at 800 degrees C, (2) pre-carbonization at 500 degrees C followed by the activation with KOH at 800 degrees C, and (3) direct activation with excess KOH at 800 degrees C. The yield of biochars was comparable, 24-28 wt.%. The elemental composition of derived biochars and the content of inorganic elements in ash were determined, and the predominance of chromium and iron was discussed. The changes in the molecular structure after carbonization were assessed with the help of FTIR and Raman spectra. The KOH activation increased specific surface area and porosity but had minimal impact on conductivity. The electric conductivity of powders was determined as a function of applied pressure, achieving a value of approximately 1 S cm-1 at 10 MPa. The electrochemical performance was evaluated using aqueous electrolytes (1 M Na2SO4 and 6 M KOH), as well as an organic electrolyte (1 M tetraethylammonium tetrafluoroborate in acetonitrile, TEABF4/ACN). The highest specific capacitance achieved was 187.7 F g-1 in 6 M KOH using the three-electrode system. Biochar was also tested in a symmetrical supercapacitor, achieving a specific capacitance of 150.9 F g-1 in 6 M KOH, and maintaining 95% capacitance after 5000 charge/discharge cycles. The supercapacitor in 6 M KOH showed the highest power density of 10.5 kW kg-1, whereas the one in 1 M TEABF4/ACN demonstrated the highest energy density of 21.3 Wh kg-1.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Biomass Conversion and Biorefinery
ISSN
2190-6815
e-ISSN
2190-6823
Volume of the periodical
Neuveden
Issue of the periodical within the volume
November 2024
Country of publishing house
DE - GERMANY
Number of pages
15
Pages from-to
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UT code for WoS article
001405192000001
EID of the result in the Scopus database
2-s2.0-85210581886