In this study, a pulsed laser deposition process was developed to deposit a carbon nanotube (CNT) assisted LiCoO2 electrode to improve its power density. The electrodes were deposited on Pt-coated Si substrates with Ar and O2 as sputtering gases and LiCoO2+C as the target. The results indicate that the working pressure is the most important parameter to control the composition of the electrode. Therefore, electrodes with a three-layer structure (i.e., LiCoO2-rich/CNT-rich/LiCoO2-rich) were fabricated by a three-step deposition process by varying the pressures from 13 to 1.3×104Pa and then 13 Pa again, and it was found that the charge/discharge capacity became approximately 1.5 times greater than that in the corresponding electrode without a CNT-rich layer. The results also indicate that a higher substrate temperature is favorable for improving the crystallinity of the electrode to approach LiCoO2 crystals.

1.
M. J. J.
Hack
and
H.
Feil
, U.S. Patent No. 795,018 (28 February
2001
).
2.
K.
Goto
,
T.
Nakagawa
,
O.
Nakamura
, and
S.
Kawata
,
IEEE Trans. Biomed. Eng.
48
,
830
(
2001
).
3.
Z.
Liu
,
J. Y.
Lee
, and
H. J.
Linder
,
J. Power Sources
97–98
,
361
(
2001
).
4.
J. K.
Hong
,
J. H.
Lee
, and
S. M.
Oh
,
J. Power Sources
111
,
90
(
2002
).
5.
J.
Kim
,
B.
Kim
,
J. G.
Lee
,
J.
Cho
, and
B.
Park
,
J. Power Sources
139
,
289
(
2005
).
6.
W.
Li
,
C.
Liang
,
W.
Zhou
,
J.
Qiu
,
Z.
Zhou
,
G.
Sun
, and
Q.
Xin
,
J. Phys. Chem.
107
,
6292
(
2003
).
7.
R. P.
Raffaelle
,
B. J.
Landi
,
J. D.
Harris
,
S. G.
Bailey
, and
A. F.
Hepp
,
Mater. Sci. Eng., B
116
,
233
(
2005
).
8.
K.
Sheem
,
Y. H.
Lee
, and
H. S.
Lim
,
J. Power Sources
158
,
1425
(
2006
).
9.
P.
Kim
,
L.
Shi
,
A.
Majumdar
, and
P. L.
McEuen
,
Phys. Rev. Lett.
87
,
215502
(
2001
).
10.
Z. H.
Yang
and
H. Q.
Wu
,
Solid State Ionics
143
,
173
(
2001
).
11.
Z. H.
Yang
,
Y. H.
Zhou
,
S. B.
Sang
,
Y.
Feng
, and
H. Q.
Wu
,
Mater. Chem. Phys.
89
,
295
(
2005
).
12.
M.
Yudasaka
,
F.
Kokai
,
K.
Takahashi
,
R.
Yamada
,
N.
Sensui
,
T.
Ichihashi
, and
S.
Iijima
,
J. Phys. Chem. B
103
,
3576
(
1999
).
13.
J. C.
Dupin
,
D.
Gonbeau
,
H.
Benqlilou-Moudden
,
Ph.
Vinatier
, and
A.
Levasseur
,
Thin Solid Films
384
,
23
(
2001
).
14.
L.
Dahéron
,
R.
Dedryvère
,
H.
Martinez
,
M.
Ménétrier
,
C.
Denage
,
C.
Delmas
, and
D.
Gonbeau
,
Chem. Mater.
20
,
583
(
2008
).
15.
Y.
Tao
,
Z. H.
Chen
,
B. J.
Zhu
, and
W. Z.
Huang
,
Solid State Ionics
161
,
187
(
2003
).
16.
V. Z.
Mordkovich
,
Synth. Met.
80
,
243
(
1996
).
You do not currently have access to this content.