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

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).

SUBMITTER: Tesfaye AT 

PROVIDER: S-EPMC7279526 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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TiO<sub>2</sub> Nanotube Layers Decorated with Al<sub>2</sub>O<sub>3</sub>/MoS<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> as Anode for Li-ion Microbatteries with Enhanced Cycling Stability.

Tesfaye Alexander Teklit AT   Sopha Hanna H   Ayobi Angela A   Zazpe Raul R   Rodriguez-Pereira Jhonatan J   Michalicka Jan J   Hromadko Ludek L   Ng Siowwoon S   Spotz Zdenek Z   Prikryl Jan J   Macak Jan M JM   Djenizian Thierry T  

Nanomaterials (Basel, Switzerland) 20200517 5

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</  ...[more]

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