Transition metal-doped lithium titanium oxide nanoparticles made using flame spray pyrolysis

Tommi Karhunen (Corresponding Author), Anna Lähde, Jani Leskinen, Robert Büchel, Oliver Waser, Unto Tapper, Jorma Jokiniemi

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Defect spinel phase lithium titanate (Li4Ti5O12) has been suggested as a promising negative electrode material for next generation lithium ion batteries. However, it suffers from low electrical conductivity. To overcome this problem conduction path length can be reduced by decreasing the primary particle size. Alternatively the bulk conductivity of Li4Ti5O12 can be increased by doping it with a conductive additive. In this paper a steady, single-step gas-phase technique for lithium titanate synthesis that combines both approaches is described. The process is used to produce doped Li4Ti5O12 nanoparticles with primary particle size of only 10 nm. The product is found to consist of single-crystalline nanoparticles with high phase and elemental purity. Two dopant materials are tested and found to behave very differently. The silver dopant forms a separate phase of nanometre-sized particles of metallic silver which agglomerate with Li4Ti5O12. The copper dopant, on the other hand, reacts with the lithium titanate to form a double spinel phase of Li3(Li1−2푥Cu3푥Ti5−푥)O12.
Original languageEnglish
Article number180821
Number of pages6
JournalISRN Nanotechnology
Volume2011
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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lithium oxides
titanium oxides
pyrolysis
sprayers
flames
lithium
transition metals
nanoparticles
spinel
silver
electrode materials
electric batteries
purity
vapor phases
conduction
copper
conductivity
electrical resistivity
defects
synthesis

Cite this

Karhunen, T., Lähde, A., Leskinen, J., Büchel, R., Waser, O., Tapper, U., & Jokiniemi, J. (2011). Transition metal-doped lithium titanium oxide nanoparticles made using flame spray pyrolysis. ISRN Nanotechnology, 2011, [180821]. https://doi.org/10.5402/2011/180821
Karhunen, Tommi ; Lähde, Anna ; Leskinen, Jani ; Büchel, Robert ; Waser, Oliver ; Tapper, Unto ; Jokiniemi, Jorma. / Transition metal-doped lithium titanium oxide nanoparticles made using flame spray pyrolysis. In: ISRN Nanotechnology. 2011 ; Vol. 2011.
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abstract = "Defect spinel phase lithium titanate (Li4Ti5O12) has been suggested as a promising negative electrode material for next generation lithium ion batteries. However, it suffers from low electrical conductivity. To overcome this problem conduction path length can be reduced by decreasing the primary particle size. Alternatively the bulk conductivity of Li4Ti5O12 can be increased by doping it with a conductive additive. In this paper a steady, single-step gas-phase technique for lithium titanate synthesis that combines both approaches is described. The process is used to produce doped Li4Ti5O12 nanoparticles with primary particle size of only 10 nm. The product is found to consist of single-crystalline nanoparticles with high phase and elemental purity. Two dopant materials are tested and found to behave very differently. The silver dopant forms a separate phase of nanometre-sized particles of metallic silver which agglomerate with Li4Ti5O12. The copper dopant, on the other hand, reacts with the lithium titanate to form a double spinel phase of Li3(Li1−2푥Cu3푥Ti5−푥)O12.",
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Transition metal-doped lithium titanium oxide nanoparticles made using flame spray pyrolysis. / Karhunen, Tommi (Corresponding Author); Lähde, Anna; Leskinen, Jani; Büchel, Robert; Waser, Oliver; Tapper, Unto; Jokiniemi, Jorma.

In: ISRN Nanotechnology, Vol. 2011, 180821, 2011.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Transition metal-doped lithium titanium oxide nanoparticles made using flame spray pyrolysis

AU - Karhunen, Tommi

AU - Lähde, Anna

AU - Leskinen, Jani

AU - Büchel, Robert

AU - Waser, Oliver

AU - Tapper, Unto

AU - Jokiniemi, Jorma

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