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Titanium niobium oxide Ti2Nb10O29/carbon hybrid electrodes derived by mechanochemically synthesized carbide for high-performance lithium-ion batteries

  • This work introduces the facile and scalable two-step synthesis of Ti 2 Nb 10 O 29 (TNO)/carbon hybrid material as a promising anode for lithium-ion batteries (LIBs). The first step uses a mechanically-induced self-sustaining reaction via ball-milling at room temperature to produce titanium niobium carbide with a stoichiometric ratio of Ti and Nb of 1 to 5. The second step involves the oxidation of as-synthesized titanium niobium carbide to produce TNO. Synthetic air yields fully oxidized TNO, while annealing in CO 2 results in TNO/carbon hybrids. The electrochemical performance for the hybrid and non-hybrid electrodes was surveyed for a narrow potential window (1.0-2.5 V vs. Li/Li + ) and a large potential window (0.05-2.5 V vs. Li/Li + ). The best hybrid material displayed a specific capacity of 350 mAh/g at a rate of 0.01 A/g (144 mAh/g at 1 A/g) in the large potential window regime. The electrochemical performance of hybrid materials is superior compared to non-hybrid materials for operation within the large potential window. Due to the advantage of carbon in hybrid material, the rate handling is faster than that of the non-hybrid one. The hybrid materials display robust cycling stability and maintain ca. 70% of their initial capacities after 500 cycles. In contrast, only ca. 26% of the initial capacity is maintained after the first 40 cycles for non-hybrid materials. We also applied our hybrid material as an anode in a full-cell lithium-ion battery by coupling it with commercial LiMn 2 O 4 .

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Metadaten
Document Type:Article
Author:Öznil BudakORCiD, Pattarachai SrimukORCiD, Mesut Aslan, Hwirim ShimORCiD, Lars BorchardtORCiD, Volker PresserORCiD
URN:urn:nbn:de:bsz:291:415-773
DOI:https://doi.org/10.1002/cssc.202002229
Parent Title (English):ChemSusChem
Volume:14
Issue:1
First Page:398
Last Page:407
Language:English
Year of first Publication:2021
Release Date:2022/08/08
Tag:Hybrid material; Lithium-ion-battery; Mechanochemistry; Titanium niobium oxide
Impact:09.140 (2021)
Funding Information:Deutsche Forschungsgemeinschaft (PR-1173/5) Bundesministerium für Bildung und Forschung (03SF0498)
Scientific Units:Energy Materials
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access:Open Access
Signature:INM 2021/009
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International