Mesoporous Ag3O4 Grafted NiO Nanosheets for High Performance

Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A.
This journal is © The Royal Society of Chemistry 2014
Ag3O4 Grafted NiO Nanosheets for High Performance Supercapacitors
Inbamani Manohara Babu1, Kamatchi Kamaraj Purushothaman*2, Gopalan Muralidharan1
1Department
of Physics, Gandhigram Rural University, Gandhigram-624302, Tamilnadu, India
of Physics, TRP Engineering College (SRM group), Irungalur, Tamilnadu.
*2Department
_______________________________________________________________________
Fig. S1 Variation of conductivity with silver level in NiO
Fig S2. EDS pattern of AGN2
1
0.1
0.08
(b)
0.08
0.06
0.06
Current (A cm -2)
Current (A cm -2)
0.1
(a)
0.04
0.02
0
-0.02
s-1
100 mV
75 mV s-1
50 mV s-1
-0.04
-0.06
0.04
0.02
0
-0.02
-0.04
100 mV s-1
75 mV s-1
50 mV s-1
-0.06
-0.08
0
0.1
0.2
0.3
0.4
0.5
0.6
0
0.1
0.2
Potential (V)
0.3
0.4
0.5
0.6
Potential (V)
0.08
0.06
(c)
(d)
0.04
0.04
Current (A cm -2)
Current (A cm -2)
0.06
0.02
0.02
0
-0.02
-0.04
100 mV s-1
75 mV s-1
50 mV s-1
-0.06
-0.08
0
0.1
0.2
0.3
0.4
0.5
0
-0.02
100 mV s-1
75 mV s-1
50 mV s-1
-0.04
0.6
Potential (V)
0
0.1
0.2
0.3
0.4
Potential (V)
Fig. S3 Cyclic Voltammograms of (a) AGN1, (b) AGN2, (c) AGN3 and (d) AGN4 at
higher scan rates.
2
0.5
0.6
0.02
(a)
(b)
-1
Specific capacitance (F g )
0.01
Current (A cm -2)
600
20 mV s-1
15 mV s-1
10 mV s-1
5 mV s-1
3 mV s-1
0
-0.01
-0.02
500
400
300
200
100
0
0.1
0.2
0.3
0.4
0.5
0.6
0
5
10
Potential (Volt)
15
20
-1
Scan rate (mV s )
Fig. S4 (a)Cyclic voltammograms of pure NiO at different scan rates.
(b) Specific capacitance as a function of scan rate.
Quantity absorbed (cm 3g-1STP)
0
350
300
250
200
15 0
10 0
50
0
0
0 .2
0 .4
0 .6
0 .8
1
1.2
Relative Pressure (P/Po)
Fig. S5 Nitrogen adsorption-desorption isotherms &
pore size distribution (inset) of AGN2
3
25
30
Specific capacitance (F g
-1
)
1800
1500
1200
AGN1
AGN2
900
AGN3
600
AGN4
300
0
1
2
3
4
Current density (A g-1)
5
Fig. S6 Specific capacitance as a function of Current density
0.006
20 mV
15 mV s-1
10 mV s-1
5 mV s-1
3 mV s-1
0.002
(b)
0
Potential (V)
Current (A cm-2)
0.004
0.2
(a)
s-1
-0.2
0
5 A g-1
4 A g-1
3 A g-1
2 A g-1
1 A g-1
0.5 A g-1
-0.4
-0.002
-0.6
-0.004
-0.8
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
Potential (V)
0
100
200
Time (s)
Fig. S7 (a) CV profile of RGO at different scan rates; (b) GCD curves of
RGO at different current densities
4
300
400
500
Energy density (W h kg -1)
40
30
20
10
0
0
100
200
300
400
500
600
-1
Power density (W kg )
Fig. S8 Ragone plot of asymmetric supercapacitor
5

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