Tuning Hierarchical Ferric Nanostructures-Decorated Diatomite for Supercapacitors

Table 1 Comparison of electrochemical performance for the ferric oxide/hydroxide based electrodes

Ferric oxide/hydroxide-based electrode	Electrolyte	Potential range (vs. SCE)	Specific capacitance (F g⁻¹)	Ref (year)
FeOOH nanoparticles	1 M Li₂SO₄	− 0.85 to − 0.1 V	148 at 0.5 A g⁻¹	[16] (2014)
FeOOH nanorods	1 M Li₂SO₄	− 0.85 to − 0.1 V	116 at 0.5 A g⁻¹	[17] (2008)
FeOOH@MnO₂ core-shell	1 M LiOH	− 0.15 to 0.6 V	178.6 at 0.1 A g^− 1	[18] (2017)
Porous flower-like Fe₂O₃	0.5 M Na₂SO₃	− 0.8 to 0 V	127 at 1 A g⁻¹	[19] (2013)
Fe₂O₃ sheets	1 M Li₂SO₄	− 0.8 to − 0.2 V	147 at 0.36 A g⁻¹	[20] (2014)
Fe₃O₄ nanosheets/carbon nanofibers	1 M Na₂SO₃	− 0.9 to 0.1 V	127 at 10 mV s⁻¹	[21] (2011)
Diatomite@FeOOH	1 M Na₂SO₄	− 1 to 0 V	157.9 at 0.5 A g⁻¹	This work