Results
Title

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

Authors

Tesfaye, Alexander Teklit; Sopha, Hanna; Ayobi, Angela; Zazpe, Raul; Rodriguez-Pereira, Jhonatan; Michalicka, Jan; Hromadko, Ludek; Ng, Siowwoon; Spotz, Zdenek; Prikryl, Jan; Macak, Jan M.; Djenizian, Thierry

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).

Subjects

ATOMIC layer deposition; SCANNING transmission electron microscopy; LITHIUM cells; X-ray photoelectron spectroscopy; ENERGY dispersive X-ray spectroscopy; NEGATIVE electrode; ANODES; CYCLING competitions

Publication

Nanomaterials (2079-4991), 2020, Vol 10, Issue 5, p953

ISSN

2079-4991

Publication type

Academic Journal

DOI

10.3390/nano10050953