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Sample Initial SC, F g-1 SC, F g-1
after 2000 cycles
CoMoO4-1 23 N/A
CoMoO4-2 46 17
CoMoO4-3 79 59
References [1] L.Q. Mai, F. Yang, Y. L. Zhao, X. Xu, L. Xu and Z. Luo, Hierarchical
MnMoO4/CoMoO4 Hetrostructured Nanowires with Enhanced
Supercapacitor Performance. Nat. Commun. 2 (2011) 381-385.
[2] M. C. Liu, L. B. Kong, X. J. Ma, C. Lu, X. M. Li, Y. C. Luo and L.
Kang, Hydrothermal Process for the Fabrication of CoMoO4.0.9 H2O
Nanorods with Excellent Electrochemical Behaviour. New J. Chem. 36
(2012) 1713-1716.
[3] X. Zhanwei, L. Zhai, X. Tan, M. B. Holt, L. Zhang, B. Shalchi
Amirkhiz, and D. Mitlin, Supercapacitive carbon nanotube-cobalt
molybdate nanocomposites prepared via solvent-free microwave synthesis.
RSC Adv. 2 (2012) 2753-2755.
Acknowledgments This research was funded from ARC’s Discovery Projects funding
scheme. The authors would like to acknowledge Australian
Synchrotron (P9499) for providing beam time to enable work on IR,
Curtin University for SEM facilities and AINSE Research Grant
(ALNGRA15051) to carry out the microscopy work at ANSTO.
Sample Initial specific
capacitance / F g-1
Specific capacitance
after 2000 cycles /
F g-1
Pure CoMoO4 (absence of
additive)
23 18
CoMoO4 + Urea 46 17
CoMoO4 + F127 surfactant 79 59
0.0 0.2 0.4 0.6-20
-10
0
10
20
30
Pure
CoMoO4
CoMoO4
+Urea
CoMoO4
+ F127
Cu
rren
t /
mA
Potential / V vs Hg / HgO
A1
C1
C2
Cyclic Voltammetry
0 400 800 1200 1600 20000
20
40
60
80
100
CoMoO4
+Urea
CoMoO4
+F127
Sp
ecif
ic C
ap
acit
an
ce /
F g
-1
Cycle number
Cycling Stability
0 900 1800 2700 36000.0
0.4
0.8
1.2
1.6
F127Urea
Discharge
Po
ten
tia
l /
V
Time / Sec
Charge
Experimental procedure
Conclusions The F127 surfactant changes the rod-like structure of CoMoO4 to nanospheres.
The interaction between the chosen surfactant and cobalt molybdate assist the
growth of nanospheres having a carbon composites on the surface for good
electronic conductivity. The mesoporous cobalt molybdate demonstrated a great
pseudo capacitance and excellent cycling stability (almost 80% capacity
retention over 2000 cycles) when utilised as electrode in a hybrid device vs
activated carbon electrode. The charge-discharge tests revealed that surfactant
assisted CoMoO4 device had a specific capacitance of 79 F g-1 and energy
density of 21 W h kg-1 at a current of 1 mA.
20 30 40 50
(-133)
(510)
(222)
(041)
(400)
(-132)
(-222)
(220)
(002)
(021)
(111)
CoMoO4
+ urea
CoMoO4
+ F127
Inte
ns
ity
/ a
.u
2 / degrees
Pure CoMoO4
X-ray diffraction patterns
(-201)
FESEM images of CoMoO4 materials prepared in the (1) absence and (2)
presence of Urea and (3) F127 as an additive. There is a significant change
in morphology from rod-shape (1) to nanowafer (2) and nanospheres (3).
TEM image of the F127 material (4) shows hexagonal shaped particles
relating to a single phase CoMoO4 (please see XRD).
1
4 3
2