Few-Layer Graphene Sheet-Passivated Porous Silicon Toward Excellent Electrochemical Double-Layer Supercapacitor Electrode

Table 1 Comparative study of the current work with the available literatures in terms of long-term cycling stability and areal capacitance

Type of material	Passivation (material/process)	Capacitance retention (retention/cycle number)	Areal capacitance (mF/cm²)	Reference
SiNWs	N/A	99.5%/200	0.046	[25]
SiNWs	SiC/CVD	95%/1000	1.7	[26]
SiC NWs	N/A	95%/200,000	0.24	[27]
PSi	Graphene/CVD	94.9%/5000	N/A	[28]
PSiNWs	Graphene/CVD	83%/5000	325	[29]
PSi	Graphene/CVD	131%/10,000	8.19	This work