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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
Author(s) -
Birrozzi Adele,
Belchi Raphaelle,
Bouclé Johann,
Geiger Dorin,
Kaiser Ute,
Passerini Stefano,
Herlin-Boime Nathalie,
Bresser Dominic
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202001067
Subject(s) - anatase , materials science , rutile , anode , lithium (medication) , chemical engineering , nanoparticle , phase (matter) , electrochemistry , carbon fibers , lithium ion battery , ion , nanotechnology , battery (electricity) , electrode , photocatalysis , composite material , composite number , chemistry , catalysis , organic chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
TiO 2 has been investigated as an alternative anode material candidate for lithium‐ion batteries for several years now due to its advantageous safety and rate capability in combination with its nontoxicity and abundance. Herein, the synthesis via laser pyrolysis is reported, which allows the single‐step, industrial‐scale realization of carbon‐coated TiO 2 nanoparticles. The modification of the synthesis parameters enables the variation of the rutile‐to‐anatase phase ratio. Following comprehensive physicochemical and electrochemical characterization, both the higher and lower rutile‐to‐anatase ratios show very stable cycling in lithium battery half cells, whereas 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.