Ppy–MnO₂ composite synthesis method, performance, electrolyte and potential window.

Compound name	Method	Performance	Electrolyte	Potential	Reference
Ppy	Electrodeposition	SC 8 mF @ 100 mV s−1	2.0 M KCl	−0.9 to 0.7 V	59
Ppy	Polymerization	SC 400 F g−1 @ 100 mV s−1, 80% retention @ 5 mA cm−2 for 5000 cycle	0.5 M H2SO4	−0.2 to 0.8 V	60
Ppy	Electrodeposition	SC 329 F g−1 @ 5 mV s−1	0.5 M H2SO4	−0.4 to −0.6 V	61
Ppy	Electropolymerzation	SC 545 F g−1 @ 100 mV s−1	1 M LiClO4	−0.4 to 0.4 V	62
Ppy	Electrodeposition	SC 476 F g−1 @ 5 mV s−1	0.5 M H2SO4	−0.4 to 0.6 V	63
MnO2	Sonochemical	SC 282 F g−1 @ 0.5 mA cm−2	1 M Ca(NO3)2	0 to 1.0 V	64
MnO2	Electrodeposition	SC 128 F g−1 @ 1 A g−1	1 M Na2SO4	0 to 1.0 V	65
MnO2	Hydrothermal	SC 73.5 F g−1 @ 2 mA cm−2	1 M Na2SO4	0 to 1.0 V	31
Ppy–MnO2	Polymerization	SC 272.72 F g−1 @ 1 mV s−1	1 M KCl	0 to 0.3 V	66
Graphene foams@Ppy–MnO2	Hydrothermal	SC 601 F g−1 @ 1 A g−1 92% retained after 5000 cycles @ 30 A g−1	1 M Na2SO4	0 to 1.0 V	51
MnO2/Ppy/reduced graphene oxide	Sonication	SC 404 F g−1 @ 0.25 A g−1	1 M Na2SO4	−0.4 to 0.6 V	55
Ppy/MnO2	Electrodeposition	SC 239 F g−1 @ 1 A g−1, 86.7% SC retention @ 10 000 cycles	1 M Na2SO4	0 to 0.9 V	67
β-MnO2/Ppy	Polymerization	SC 294 F g−1 @ 1 A g−1	1 M Na2SO4	0.0 to 1.0 V	44
Ppy/MnO2	Electrochemical deposition	SC 755.99 F g−1 @ 1.5 A g−1	1.0 M KCl	0.0 to 1.0 V	45
Ppy/MnO2	Electrochemical deposition	13 mF cm−2 @ 0.1 mA cm−2, SC 84% retention 5000 CV cycle @ 500 mV s−1	PVA/LiClO4	0 to 8.0 V	11
MnO2/Ppy	Electrochemical deposition	SC 141.6 F g−1 @ 2 mA cm−2	1 M Na2SO4	0.0 to 1.0 V	31
Ppy/MnO2	Electrochemical deposition	Specific energy of 27.2 W h kg−1 at 0.85 kW kg−1	1 M Na2SO4	−0.8 to 0.0 V	68
Ppy/MnOx	Electrochemical deposition	343 F g−1 @ 100 mV s−1	1 M H2SO4	−0.3 to 0.6 V	69
SWNTs@MnO2/Ppy	Polymerization	SC 353 F g−1 @ 0.1 A g−1	1 M Na2SO4	0 to 0.8 V	58
α-MnO2/Ppy	Polymerization	SC 209 F g−1 @ 0.5 A g−1	Ca(NO3)2·4H2O	0 to 1.0 V	47
Ppy/MnO2 on carbon cloth	Electrochemical deposition	SC 325 F g−1 @ 0.2 A g−1	1 M Na2SO4	0 to 1.0 V	50
Nanofiber/MnO2/Ppy	Electrodeposition	SC 409.88 F g−1 @ 25 mV s−1	1.0 M KCl	0 to 1.0 V	46
MnO2/Ppy	Polymerization	SC 312 F g−1 @ 10 mV s−1	0.5 M Na2SO4	−0.2 to 0.8 V	41
Ti3C2Tx and Ppy/MnO2	Electrophoretic deposition	SC 128 F g−1 @ 5 mV s−1 80.7% SC after 5000 cycles @ 1.72 mA cm−2	PVA/H2SO4	0 to 1.2 V	70
Nickel metallized nanofibers based MnO2/Ppy	Electrodeposition	SC 28.48 F g−1 @ 50 mV s−1	—	−0.8 to 0 V	71
MnO2@Ppy	Electrodeposition	SC 141.6 F g−1 @ 2 mA cm−2	1 M Na2SO4	0 to 1.0 V	31
MnO2/Ppy@CNT	Electroplating	SC 461 F g−1 @ 0.2 A g−1	1 M Na2SO4	0 to 0.85 V	72