Process Design for Size-Controlled Flame Spray Synthesis of Li4Ti5O12 and Electrochemical Performance

Waser, O.; Brenner, O.; Groehn, A.J.; Pratsinis, S.E.

doi:51--66

Artykuł - szczegóły

Tytuł artykułu

Process Design for Size-Controlled Flame Spray Synthesis of Li4Ti5O12 and Electrochemical Performance

Autorzy

Waser O. , Brenner O. , Groehn A.J. , Pratsinis S.E.

Treść / Zawartość

Pełne teksty:

Process Design for Size-Controlled Flame Spray Synthesis of Li4Ti5O12 and Electrochemical Performance.pdf

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Identyfikatory

DOI

51--66

Warianty tytułu

Języki publikacji

Abstrakty

Inexpensive synthesis of electroceramic materials is required for efficient energy storage. Here the design of a scalable process, flame spray pyrolysis (FSP), for synthesis of size-controlled nanomaterials is investigated focusing on understanding the role of air entrainment (AE) during their aerosol synthesis with emphasis on battery materials. The AE into the enclosed FSP reactor is analysed quantitatively by computational fluid dynamics (CFD) and calculated temperatures are verified by Fourier transform infrared spectroscopy (FTIR). Various Li4Ti5O12 (LTO) particle compositions are made and characterized by N2 adsorption, electron microscopy and X-ray diffraction while the electrochemical performance of LTO is tested at various charging rates. Increasing AE decreases recirculation in the enclosing tube leading to lower reactor temperatures and particle concentrations by air dilution as well as shorter and narrower residence time distributions. As a result, particle growth by coagulation - coalescence decreases leading to smaller primary particles that are mostly pure LTO exhibiting high C-rate performance with more than 120 mAh/g galvanostatic specific charge at 40C, outperforming commercial LTO. The effect of AE on FSP-made particle characteristics is demonstrated also in combustion synthesis of LiFePO4 and ZrO2.

Słowa kluczowe

Li-ion battery Li4Ti5O12 size control residence time distribution computational fluid dynamics flame synthesis of electroceramics

bateria litowo-jonowa Li4Ti5O12 kontrola rozmiaru płyn obliczeniowy do dystrybucji czasu przebywania dynamika synteza płomieniowa elektroceramiki

Wydawca

Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk

Czasopismo

Chemical and Process Engineering

Rocznik

2017

Tom

Vol. 38, nr 1

Strony

51--66

Opis fizyczny

Bibliogr. 55 poz., rys.

Twórcy

autor

Waser O.

1Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland

autor

Brenner O.

1Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland

autor

Groehn A.J.

autor

Pratsinis S.E.

sotiris.pratsinis@ptl.mavt.ethz.ch

1Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-d897a471-58eb-4ea8-92da-08c1c7555a08