Effect of doping and crystallite size on the electrochemical performance of Li4Ti5O12
Karhunen, T., Välikangas, J., Torvela, T., Lähde, A., Lassi, U., & Jokiniemi, J. (2016). Effect of doping and crystallite size on the electrochemical performance of Li4Ti5O12. Journal of Alloys and Compounds, 659, 132-137. https://doi.org/10.1016/j.jallcom.2015.10.125
Julkaistu sarjassa
Journal of Alloys and CompoundsTekijät
Päivämäärä
2016Tekijänoikeudet
© 2016 Elsevier. This is a pre-print version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
Defect spinel phase lithium titanate (Li4Ti5O12) has been suggested as a promising negative electrode material for next generation lithium ion batteries. Flame spray pyrolysis has been shown to be a viable fast, one-step process for synthesis of nanoparticulate Li4Ti5O12. However, due to the rapid quenching that is integral to the process the crystallite size remain very small and non-uniform.
To overcome this shortcoming a vertical flow tube furnace was used to increase the high-temperature residence time. This resulted in an increase in the crystallite size and crystallinity of the product. As a result of this increase the electrochemical performance of the Li4Ti5O12 was markedly improved.
Furthermore, silver doping of the Li4Ti5O12 material can be carried out simultaneously with its synthesis in the FSP process. The resulting nanosized silver particles on the surface of the Li4Ti5O12 particles further improve the electrochemical performance during high current operations.
The specific capacities of these high-temperature synthesised pure and silver-doped Li4Ti5O12 nanoparticles were found to increase by up to 6% and 19%, respectively, compared to a commercial reference. Thus the technique provides a simple method for synthesising superior quality Li4Ti5O12 for battery applications.
...
Julkaisija
Elsevier B.V.ISSN Hae Julkaisufoorumista
0925-8388Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/25326525
Metadata
Näytä kaikki kuvailutiedotKokoelmat
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Effect of Secondary Heat Treatment after a Washing on the Electrochemical Performance of Co-Free LiNi0.975Al0.025O2 Cathodes for Li-Ion Batteries
Välikangas, Juho; Laine, Petteri; Hu, Tao; Tynjälä, Pekka; Selent, Marcin; Molaiyan, Palanivel; Jürgen, Kahr; Lassi, Ulla (Wiley-VCH Verlag, 2024)The steadily growing electric vehicle market is a driving force in low-cost, high-energy-density lithium-ion battery development. To meet this demand, LiNi0.975Al0.025O2 (LNA), a high-energy-density and cobalt-free cathode ... -
Synergistic effects of low-level magnesium and chromium doping on the electrochemical performance of LiNiO2 cathodes
Laine, Petteri; Välikangas, Juho; Kauppinen, Toni; Hu, Tao; Wang, Shubo; King, Graham; Singh, Harishchandra; Tynjälä, Pekka; Lassi, Ulla (Springer, 2024)LiNiO2 cathode materials with magnesium and chromium doping were prepared using a simple low - cost and efficient co - precipitation and lithiation procedure. During this procedure, both magnesium and chromium form a ... -
Effect of high temperature thermal treatment on the electrochemical performance of natural flake graphite
Lähde, Anna; Välikangas, Juho; Meščeriakovas, Arūnas; Karhunen, Tommi; Meščeriakovė, Sara-Maaria; Sippula, Olli; Leinonen, Seppo; Lassi, Ulla; Jokiniemi, Jorma (Springer, 2024)Natural graphite is currently considered as a critical raw material in EU. The demand for graphite is still increasing as it is commonly used in the anodes of the Li-ion batteries (LIBs). The total graphite content for ... -
Co‐precipitation of NCM 811 Using Recycled and Purified Manganese : Effect of Impurities on the Battery Cell Performance
Kauppinen, Toni; Laine, Petteri; Välikangas, Juho; Tynjälä, Pekka; Hu, Tao; Salminen, Justin; Lassi, Ulla (Wiley-VCH Verlag, 2023)Co-precipitation of NCM811 precursors and cathodes for lithium-ion batteries was carried out using recycled and purified manganese solution. In this paper, the aim is to study the role of the impurities in the co-precipitation ... -
Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance
Laine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla (Royal Society of Chemistry, 2023)Co-precipitation of Ni0.8Co0.1Mn0.1(OH)2 (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors is carried out from concentrated metal sulphate solutions. In this paper, the aim is to study the role of magnesium ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.