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Correlating structural properties with electrochemical behavior of non-graphitizable carbons in Na-ion batteries
ID Tratnik, Blaž (Avtor), ID Van de Velde, Nigel Willy (Avtor), ID Jerman, Ivan (Avtor), ID Kapun, Gregor (Avtor), ID Tchernychova, Elena (Avtor), ID Tomšič, Matija (Avtor), ID Jamnik, Andrej (Avtor), ID Genorio, Boštjan (Avtor), ID Vižintin, Alen (Avtor), ID Dominko, Robert (Avtor)

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Izvleček
We report on a detailed structural versus electrochemical property investigation of the corncob-derived non-graphitizable carbons prepared at different carbonization temperatures using a combination of structural characterization methodology unique to this field. Non-graphitizable carbons are currently the most viable option for the negative electrode in sodium-ion batteries. However, many challenges arise from the strong dependence of the precursor’s choice and carbonization parameters on the evolution of the carbon matrix and its resulting electrochemistry. We followed structure development upon the increase in carbonization temperature with thorough structural characterization and electrochemical testing. With the increase of carbonization temperature from 900 to 1600 °C, our prepared materials exhibited a trend toward increasing structural order, an increase in the specific surface area of micropores, the development of ultramicroporosity, and an increase in conductivity. This was clearly demonstrated by a synergy of small- and wide-angle X-ray scattering, scanning transmission electron microscopy, and electron-energy loss spectroscopy techniques. Three-electrode full cell measurements confirmed incomplete desodiation of Na$^+$ ions from the non-graphitizable carbons in the first cycle due to the formation of a solid−electrolyte interface and Na trapping in the pores, followed by a stable second cycle. The study of cycling stability over 100 cycles in a half-cell configuration confirmed the observed high irreversible capacity in the first cycle, which stabilized to a slow decrease afterward, with the Coulombic efficiency reaching 99% after 30 cycles and then stabilizing between 99.3 and 99.5%. Subsequently, a strong correlation between the determined structural properties and the electrochemical behavior was established.

Jezik:Angleški jezik
Ključne besede:hard carbon, Na-ion battery, structural properties, carbonization process, SAXS, correlations, porosity, electrochemical performance, chemical structure, electrodes, materials, surface chemistry
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Leto izida:2022
Št. strani:Str. 10667–10679
Številčenje:Vol. 5, iss. 9
PID:20.500.12556/RUL-142006 Povezava se odpre v novem oknu
UDK:544.5/.6
ISSN pri članku:2574-0962
DOI:10.1021/acsaem.2c01390 Povezava se odpre v novem oknu
COBISS.SI-ID:124486403 Povezava se odpre v novem oknu
Datum objave v RUL:14.10.2022
Število ogledov:392
Število prenosov:89
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Gradivo je del revije

Naslov:ACS applied energy materials
Skrajšan naslov:ACS app. energy mater.
Založnik:American Chemical Society
ISSN:2574-0962
COBISS.SI-ID:39550725 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:elektrokemija, testiranje, ogljik, elektroliti

Projekti

Financer:EC - European Commission
Program financ.:H2020
Številka projekta:875629
Naslov:Na ion materials as essential components to manufacture robust battery cells for non-automotive applications
Akronim:NAIMA

Financer:EC - European Commission
Program financ.:M-ERA.NET
Akronim:NOEL

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Slovenia, Ministry of Education, Science, and Sport
Akronim:NOEL

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0423
Naslov:Sodobni akumulatorji kot podpora zelenemu prehodu in elektromobilnosti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0393
Naslov:Napredni materiali za nizkoogljično in trajnostno družbo

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P1-0201
Naslov:Fizikalna kemija

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P1-0175
Naslov:Napredna anorganska kemija

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:N2-0266
Naslov:Fizikalno-kemijska in morfološka analiza akumulatorskih elektrodnih medfaznih plasti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:N1-0139
Naslov:Delaminacija plastovitih materialov ter struktura in dinamika v zelenih topilih

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