Spray-Pyrolysis Preparation of Li4Ti5O12/Si Composites for Lithium-Ion Batteries

  • A. Terechshenko National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana, Kazakhstan
  • A. Sanbayeva National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana, Kazakhstan; Institute of Batteries LLC, 53 Kabanbay Batyr Ave, Astana, Kazakhstan
  • M.R. Babaa National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana, Kazakhstan; Institute of Batteries LLC, 53 Kabanbay Batyr Ave, Astana, Kazakhstan
  • A. Nurpeissova National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana, Kazakhstan; Institute of Batteries LLC, 53 Kabanbay Batyr Ave, Astana, Kazakhstan
  • Z. Bakenov National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana, Kazakhstan; Institute of Batteries LLC, 53 Kabanbay Batyr Ave, Astana, Kazakhstan
Keywords: lithium-ion battery, spray pyrolysis, lithium titanium oxide

Abstract

This paper introduces the novel anode material which is Li4Ti5O12/Si prepared by gas-stated method, mainly spray-pyrolysis technique. The literature review performed in this paper revealed two main components which can be potentially mixed into the efficient anode material. Silicon (Si) has the highest possible capacity of 4200 mAh g-1 among all commonly used anodes. Due to its ‘zero-strain’ (<1% volume change) properties and stable cycling, Li4Ti5O12 (LTO) is considered as a promising anode for lithium ion batteries. Combination of these two anode materials is considered as a promising approach to prepare a high performance composite anode. The precursor solution consisted of homogeneous mixture of lithium nitrate and titanium tetraisopropoxide dissolved in deionized water with equimolar concentration of 0.5 M. The aerosol formation was performed at nitrogen environment and the droplets were carried into the quartz tube reactor at the flowrate of 4 L min-1. The rector temperature was held at 800 °C. The spray-pyrolysis synthesis was performed as one-step operation, excluding the need of calcination of as-prepared powders, and continuous process by the mean of peristaltic pump. The as-prepared powders had wide size distribution from nanometers to microns. The materials obtained had well-crystallized structure with insignificant amount of impurities. The powders were analyzed by the following analytical equipment: 1) the presence of Li4Ti5O12 and Si in the obtained composite was confirmed by X-ray diffraction technique (XRD); 2) The structure and morphology of LTO and Si molecules were observed and studied with Scanning Electron Microscopy (SEM).

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Published
2019-02-20
How to Cite
[1]
A. Terechshenko, A. Sanbayeva, M. Babaa, A. Nurpeissova, and Z. Bakenov, “Spray-Pyrolysis Preparation of Li4Ti5O12/Si Composites for Lithium-Ion Batteries”, Eurasian Chem. Tech. J., vol. 21, no. 1, pp. 69-73, Feb. 2019.
Section
Articles