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Sökning: WFRF:(Cavallo Carmen 1986) > Pereira de Carvalho Rodrigo > Effect of the Niobi...

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FältnamnIndikatorerMetadata
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001oai:research.chalmers.se:a5e85787-f9e2-4094-8357-065c5d572d2a
003SwePub
008210225s2021 | |||||||||||000 ||eng|
009oai:DiVA.org:uu-439839
0247 a https://research.chalmers.se/publication/5224622 URI
0247 a https://doi.org/10.1021/acsaem.0c021572 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4398392 URI
040 a (SwePub)cthd (SwePub)uu
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Cavallo, Carmen,d 1986u Chalmers tekniska högskola,Chalmers University of Technology,Universitetet i Oslo,University of Oslo,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.4 aut0 (Swepub:cth)ccarmen
2451 0a Effect of the Niobium Doping Concentration on the Charge Storage Mechanism of Mesoporous Anatase Beads as an Anode for High-Rate Li-Ion Batteries
264 c 2020-12-17
264 1b American Chemical Society (ACS),c 2021
338 a electronic2 rdacarrier
520 a A promising strategy to improve the rate performance of Li-ion batteries is to enhance and facilitate the insertion of Li ions into nanostructured oxides like TiO2. In this work, we present a systematic study of pentavalent-doped anatase TiO2 materials for third-generation high-rate Li-ion batteries. Mesoporous niobium-doped anatase beads (Nb-doped TiO2) with different Nb5+ doping (n-type) concentrations (0.1, 1.0, and 10% at.) were synthesized via an improved template approach followed by hydrothermal treatment. The formation of intrinsic n-type defects and oxygen vacancies under RT conditions gives rise to a metallic-type conduction due to a shift of the Fermi energy level. The increase in the metallic character, confirmed by electrochemical impedance spectroscopy, enhances the performance of the anatase bead electrodes in terms of rate capability and provides higher capacities both at low and fast charging rates. The experimental data were supported by density functional theory (DFT) calculations showing how a different n-type doping can be correlated to the same electrochemical effect on the final device. The Nb-doped TiO2 electrode materials exhibit an improved cycling stability at all the doping concentrations by overcoming the capacity fade shown in the case of pure TiO2 beads. The 0.1% Nb-doped TiO2-based electrodes exhibit the highest reversible capacities of 180 mAh g-1 at 1C (330 mA g-1) after 500 cycles and 110 mAh g-1 at 10C (3300 mA g-1) after 1000 cycles. Our experimental and computational results highlight the possibility of using n-type doped TiO2 materials as anodes in high-rate Li-ion batteries.
650 7a NATURVETENSKAPx Kemix Oorganisk kemi0 (SwePub)104042 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciencesx Inorganic Chemistry0 (SwePub)104042 hsv//eng
650 7a NATURVETENSKAPx Kemix Materialkemi0 (SwePub)104032 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciencesx Materials Chemistry0 (SwePub)104032 hsv//eng
650 7a TEKNIK OCH TEKNOLOGIERx Kemiteknikx Annan kemiteknik0 (SwePub)204992 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Chemical Engineeringx Other Chemical Engineering0 (SwePub)204992 hsv//eng
653 a DFT calculation
653 a Rietveld refinement
653 a mesoporous niobium doped anatase
653 a n-type doped anode materials
653 a high-rate batteries
653 a Li-ion batteries
7001 a Calcagno, Giulio,d 1990u Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.4 aut0 (Swepub:cth)calcagno
7001 a Pereira de Carvalho, Rodrigou Uppsala universitet,Materialteori4 aut0 (Swepub:uu)rodpe210
7001 a Sadd, Matthew,d 1994u Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.4 aut0 (Swepub:cth)sadd
7001 a Gonano, Brunou Universitetet i Oslo,University of Oslo,Univ Oslo, Ctr Mat Sci & Nanotechnol, Dept Chem, N-0371 Oslo, Norway.4 aut
7001 a Araujo, Moyses,d 1975-u Uppsala universitet,Materialteori4 aut0 (Swepub:uu)camar637
7001 a Palmqvist, Anders,d 1966u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)adde
7001 a Matic, Aleksandar,d 1968u Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.;Univ Oslo, Ctr Mat Sci & Nanotechnol, Dept Chem, N-0371 Oslo, Norway.4 aut0 (Swepub:cth)matic
7102 a Chalmers tekniska högskolab Universitetet i Oslo4 org
7730 t ACS Applied Energy Materialsd : American Chemical Society (ACS)g 4:1, s. 215-225q 4:1<215-225x 2574-0962
8564 u https://research.chalmers.se/publication/522462/file/522462_Fulltext.pdfx primaryx freey FULLTEXT
8564 u https://pubs.acs.org/doi/pdf/10.1021/acsaem.0c02157
8564 u https://doi.org/10.1021/acsaem.0c02157y Fulltext
8564 u https://uu.diva-portal.org/smash/get/diva2:1543384/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 8u https://research.chalmers.se/publication/522462
8564 8u https://doi.org/10.1021/acsaem.0c02157
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-439839

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