ALD Al2O3‑Coated TiO2 Nanotube
Layers as Anodes for Lithium-Ion Batteries
Posted on 2017-06-16 - 17:52
The utilization of the anodic TiO2 nanotube layers, with uniform Al2O3 coatings of different thicknesses (prepared by atomic
layer deposition, ALD), as the new electrode material for lithium-ion
batteries (LIBs), is reported herein. Electrodes with very thin Al2O3 coatings (∼1 nm) show a superior electrochemical
performance for use in LIBs compared to that of the uncoated TiO2 nanotube layers. A more than 2 times higher areal capacity
is received on these coated TiO2 nanotube layers (∼75
vs 200 μAh/cm2) as well as higher rate capability
and coulombic efficiency of the charging and discharging reactions.
Reasons for this can be attributed to an increased mechanical stability
of the TiO2 nanotube layers upon Al2O3 coating, as well as to an enhanced diffusion of the Li+ ions within the coated nanotube layers. In contrast, thicker ALD
Al2O3 coatings result in a blocking of the electrode
surface and therefore an areal capacity decrease.
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Sopha, Hanna; Salian, Girish D.; Zazpe, Raul; Prikryl, Jan; Hromadko, Ludek; Djenizian, Thierry; et al. (2017). ALD Al2O3‑Coated TiO2 Nanotube
Layers as Anodes for Lithium-Ion Batteries. ACS Publications. Collection. https://doi.org/10.1021/acsomega.7b00463
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AUTHORS (7)
HS
Hanna Sopha
GS
Girish D. Salian
RZ
Raul Zazpe
JP
Jan Prikryl
LH
Ludek Hromadko
TD
Thierry Djenizian
JM
Jan M. Macak
KEYWORDS
ALD Al 2 O 3 coatings resultLIB2 timesAl 2 O 3 coatingLithium-Ion Batteriesanodic TiO 2 nanotube layerslayer depositionuniform Al 2 O 3 coatingsareal capacityTiO 2 nanotube layerscoulombic efficiencyelectrode surfacenanotube layersareal capacity decreaserate capabilityelectrochemical performancelithium-ion batterieselectrode material