NANOSTRUCTURED TiO2 MATERIALS FOR NEW-GENERATION Li-ION BATTERIES - Electrochemical Nanofabrication: Principles and Applications - page 214

with about 600 nm length, which are expressed per electrode area to allow
better comparison with literature data for thin-film microbatteries. Reversible and irreversible areal capacities and efficiency on
cycling of the ntTiO

Table 5.1 Summary of capacity values for ntTiO

2

Reprinted from Electrochim. Acta , 54, Ortiz, G. F., Hanzu,
I., Knauth, P., Lavela, P., Tirado, J. L., and Djenizian, T., “TiO 2 nanotubes manufactured by anodization of Ti thin ilms for
on-chip Li-ion 2D microbateries,” 4262-4268, (2009), with permission from Elsevier.

layers as electrodes in experimental Li test cells (

2

)

Electrode Current

density
(μA cm -2 )

First
discharge
(μAh cm -2 )

Irreversible
capacity (μAh
cm -2 )

1 st
reversible
capacity
(μAh cm -2 )

50 th
reversible
capacity
(μAh cm -2 )

Efficiency
(%)

Amorphous ntTiO on Si 5 196 107 89 56 63

2

100 45 19 26 17 65

Crystalline ntTiO
2

on Si 5 165 89 76 40 53

100 34 10 24 23 96

Amorphous ntTiO
2

on Ti 5 129 76 53 37 70

Foil

100 41 18 23 15 65

Crystalline ntTiO on Ti 5 83 34 49 29 60

2

Foil

100 39 13 26 20 77

Note: values for layers of 600 nm length onto Si substrates and Ti foils.