Table 4.
Table of gravimetric capacitances before and after cycling for all graphene materials calculated from both CV and GCD at two scan rates and current densities. Note for the rGO electrodes it was not possible to calculate the capacitance from the GCD after cycling as the discharge curve was dominated by the iR drop.
|
Material |
Before Cycling |
|||
|---|---|---|---|---|
|
|
CV capacitance [F g−1] |
GCD Capacitance [F g−1] |
||
|
|
10 mV s−1 |
100 mV s−1 |
0.5 A g−1 |
2 A g−1 |
|
GO |
164.6±3.2 |
59.2±2.1 |
153.7±1.6 |
10.9±0.8 |
|
rGO |
137.4±3.3 |
41.3±1.2 |
119.6±2.6 |
49.4±1.9 |
|
LEG |
14.8±0.7 |
13.4±0.8 |
14.5±0.4 |
12.7±0.5 |
|
CEEG |
32.8±0.9 |
29.8±1.1 |
22.4±0.7 |
20.1±0.6 |
|
AEEG |
44.0±1.4 |
42.8±1.9 |
46.7±1.0 |
40.8±0.7 |
|
GNR |
11.4±0.5 |
9.7±0.5 |
12.4±0.6 |
11.5±0.9 |
|
Material |
After Cycling |
|||
|---|---|---|---|---|
|
CV Capacitance [F g−1] |
GCD Capacitance [F g−1] |
|||
|
10 mV s−1 |
100 mV s−1 |
0.5 A g−1 |
2 A g−1 |
|
|
GO |
166.4±2.7 |
62.1±2.3 |
181.5±1.5 |
15.7±0.9 |
|
rGO |
81.2±2.3 |
31.9±1.8 |
N/A |
N/A |
|
LEG |
14.9±0.7 |
12.4±0.8 |
22.2±1.0 |
17.9±1.2 |
|
CEEG |
29.2±1.1 |
26.5 ±1.0 |
27.9±0.6 |
25.9±0.8 |
|
AEEG |
44.6±1.1 |
42.3±1.2 |
47.8±1.0 |
42.8±0.9 |
|
GNR |
14.1±0.8 |
11.7±0.7 |
15.7±0.7 |
14.6±0.6 |