Role of TiO 2 Phase Composition Tuned by LiOH on The Electrochemical Performance of Dual-Phase Li 4 Ti 5 O 12 -TiO 2 Microrod as an Anode for Lithium-Ion Battery

Lukman Noerochim, Wahyu Caesarendra, Abdulloh Habib, Widyastuti, Suwarno, Yatim Lailun Ni’mah, Achmad Subhan, Bambang Prihandoko and Buyung Kosasih
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Lukman Noerochim: Department of Materials and Metallurgical Engineering, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
Wahyu Caesarendra: Faculty of Integrated Technologies, Universiti Brunei Darussalam, Jalan Tungku Link BE1410, Brunei Darussalam
Abdulloh Habib: Department of Materials and Metallurgical Engineering, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
Widyastuti: Department of Materials and Metallurgical Engineering, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
Suwarno: Department of Mechanical Engineering, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
Yatim Lailun Ni’mah: Department of Chemistry, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
Achmad Subhan: Research Center of Physics, Indonesian Institute of Science, Serpong 15314, Indonesia
Bambang Prihandoko: Research Center of Physics, Indonesian Institute of Science, Serpong 15314, Indonesia
Buyung Kosasih: School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, Wollongong 2522, Australia

Energies, 2020, vol. 13, issue 20, 1-15

Abstract: In this study, a dual-phase Li 4 Ti 5 O 12 -TiO 2 microrod was successfully prepared using a modified hydrothermal method and calcination process. The stoichiometry of LiOH as precursor was varied at mol ratio of 0.9, 1.1, and 1.3, to obtain the appropriate phase composition between TiO 2 and Li 4 Ti 5 O 12 . Results show that TiO 2 content has an important role in increasing the specific capacity of electrodes. The refinement of X-ray diffraction patterns by Rietveld analysis confirm that increasing the LiOH stoichiometry suppresses the TiO 2 phase. In the scanning electron microscopy images, the microrod morphology was formed after calcination with diameter sizes ranging from 142.34 to 260.62 nm and microrod lengths ranging from 5.03–7.37 μm. The 0.9 LiOH sample shows a prominent electrochemical performance with the largest specific capacity of 162.72 mAh/g and 98.75% retention capacity achieved at a rate capability test of 1 C. This finding can be attributed to the appropriate amount of TiO 2 that induced the smaller crystallite size, and lower charge transfer resistance, enhancing the lithium-ion insertion/extraction process and faster diffusion kinetics.

Keywords: hydrothermal; Li 4 Ti 5 O 12 -TiO 2; microrod; TiO 2 rutile; lithium-ion battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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