Biomedical Engineering Reference
In-Depth Information
μ
of 77
Ah cm
-
2
(in first reversible cycle) and after 50 cycles is
μ
55
. Compared with other thin-layer-based electrodes
that have been reported in literature — (i) MoS
Ah cm
-
2
-based planar Li-
2
ion battery [6] and (ii) TiO
deposited on an Al nanorod current
2
collector [90]— the ntTiO
2
thin films shown in this work present
an areal capacity of 55 μAh cm
after 50 cycles, suggesting that
this electrode can be a potential candidate for the fabrication of 2D
microbatteries. Moreover, it worthy to note that ntTiO
2
-
2
layers can be
used to fabricate nanocomposite electrodes, e.g., ntTiO
2
[91]. It
can be noted that the morphology of tin crystallites depends on the
electrochemical parameters. For instance, when electrodeposition
is performed at a lower current density (
/SnO
x
-
5 mA cm
-
2
), the shape
[91]. The different
crystallites morphology [92], as well as the filling of nanotubes [93],
is governed solely by the electrodepositing parameters. All these
nano-architectured electrodes are of special interest as possible
alternative for negative electrodes in Li-ion batteries.
of tin oxide is sponge-like structure into ntTiO
2
140
Amorphous ntTiO
2
Compact Layer of TiO
2
R.M.S of TiO
2
at 100ºC
R.M.S of TiO
2
at 300ºC
R.M.S of TiO
2
at 450ºC
120
100
80
60
40
20
0
0
10
20
30
40
50
Cycle Number / n
Figure 5.18
Capacity evolution vs. cycle number for amorphous ntTiO
thin
2
film, compact layer of TiO
electrochemical grown at 20V for 60 min in 1
2
M H
electrode prepared by reverse
micelle synthesis (R.M.S.) at different temperatures. Current density of 5
PO
+ 1 M NaOH electrolyte. Micro-TiO
3
4
2
μ
A
cm
-2
between 2.6 and 1 V.
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