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

DOIFull Paper Access

14

Citations

52

References

2020

Year

Alexander T. Tesfaye, Hanna Sopha, Angela Ayobi, Raúl Zazpe, Jhonatan Rodríguez‐Pereira, Jan Michalička, Luděk Hromádko, Siowwoon Ng, Zdeněk Spotz, Jan Přikryl,
Nanomaterials

Abstract

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

References

YearCitations

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