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MDPI, Nanomaterials, 5(10), p. 953, 2020

DOI: 10.3390/nano10050953

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TiO2 Nanotube Layers Decorated with Al2O3/MoS2/Al2O3 as Anode for Li-ion Microbatteries with Enhanced Cycling Stability

Journal article published in 2020 by Alexander Teklit Tesfaye ORCID, Hanna Sopha, Angela Ayobi, Raul Zazpe, Jhonatan Rodriguez-Pereira ORCID, Jan Michalicka, Ludek Hromadko, Siowwoon Ng ORCID, Zdenek Spotz, Jan Prikryl, Jan M. Macak ORCID, Thierry Djenizian ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

TiO2 nanotube layers (TNTs) decorated with Al2O3/MoS2/Al2O3 are investigated as a negative electrode for 3D Li-ion microbatteries. Homogenous nanosheets decoration of MoS2, sandwiched between Al2O3 coatings within self-supporting TNTs was carried out using atomic layer deposition (ALD) process. The structure, morphology, and electrochemical performance of the Al2O3/MoS2/Al2O3-decorated TNTs were studied using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and chronopotentiometry. Al2O3/MoS2/Al2O3-decorated TNTs deliver an areal capacity almost three times higher than that obtained for MoS2-decorated TNTs and as-prepared TNTs after 100 cycles at 1C. Moreover, stable and high discharge capacity (414 µAh cm−2) has been obtained after 200 cycles even at very fast kinetics (3C).