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Effect of the Secondary Rutile Phase in Single‐Step Synthesized Carbon‐Coated Anatase TiO 2 Nanoparticles as Lithium‐Ion Anode Material

Abstract : TiO2 has been investigated as alternative anode material candidate for lithium-ion batteries for several years now due to its advantageous safety and rate capability in combination with its non-toxicity and abundance. Herein, we report the synthesis via laser pyrolysis, which allows the single-step, industrial-scale realization of carbon-coated TiO2 nanoparticles. The modification of the synthesis parameters enables the variation of the rutile-to-anatase phase ratio. Following a comprehensive physicochemical and electrochemical characterization, both the higher and lower rutile-to-anatase ratio show very stable cycling in lithium battery half-cells, while the extended presence of the rutile phase limits the achievable specific capacity and lowers the apparent lithium-ion diffusion coefficient, which leads to relatively lower capacities at elevated current densities.
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https://hal-cea.archives-ouvertes.fr/cea-03139212
Contributor : Serge Palacin <>
Submitted on : Thursday, February 11, 2021 - 5:40:14 PM
Last modification on : Friday, April 23, 2021 - 3:16:04 AM

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Adele Birrozzi, Raphaelle Belchi, Johann Bouclé, Dorin Geiger, Ute Kaiser, et al.. Effect of the Secondary Rutile Phase in Single‐Step Synthesized Carbon‐Coated Anatase TiO 2 Nanoparticles as Lithium‐Ion Anode Material. Energy Technology, Wiley, In press, 9 (4), pp.2001067. ⟨10.1002/ente.202001067⟩. ⟨cea-03139212⟩

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