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Solid-State Synthesis of Li4Ti5O12 Whiskers from TiO2-B
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology.
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2016 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 75, p. 204-210Article in journal (Refereed) Published
Abstract [en]

In this work, Li4Ti5O12 (LTO) was synthesized from the precursors of TiO2-B and anatase whiskers, respectively. The synthesized LTO whiskers from TiO2-B whiskers via a solid state reaction at 650 °C have a high degree of crystallinity with an average diameter of 300 nm. However, when anatase whiskers were used as the precursor, only particle morphology LTO was produced at 750 °C. The further analysis of the precursors, the intermediate products and the final products reveal that the crystal structure of the anatase hinders the diffusion of lithium, leading to a typical reaction-diffusion process. Under this condition, only particle morphology LTO can be produced. However, the crystal structure of the TiO2-B is easy for lithium diffusion and the process is performed in two separated steps (i.e. diffusion and reaction), which makes it possible to decrease the solid-state reaction temperature down to 650 °C and then maintain the morphologies of whiskers.

Place, publisher, year, edition, pages
2016. Vol. 75, p. 204-210
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-6215DOI: 10.1016/j.materresbull.2015.11.057Local ID: 46954a94-e36b-4d0f-9b2b-a3d9866055fbOAI: oai:DiVA.org:ltu-6215DiVA: diva2:979092
Note
Validerad; 2016; Nivå 2; 20151201 (xiajix)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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