SCs	Supercapacitors
ED	Energy density
PD	Powder density
EDLC	Electrical double-layer capacitor
ESR	Electrochemical series resistance
SSSCs	Solid-state SCs
CNT	Carbon nanotubes
GO	Graphene oxide
RGO/rGO	Reduced graphene oxide
HCNS	Carbon hollow nanospheres
LDH	Layered double hydroxide
CNFs	Carbon nanofibers
CPs	Conducting polymers
PANI	Polyaniline
CV	Cyclic voltammetry
DT	Discharge time
CT	Charging time
GQD	Graphene quantum dot
ACN	Acetonitrile
PC	Polycarbonate
1D, 2D, and 3D	Dimension
DFT	Density-functional theory
GNF	Graphene nanoflake
GNS	Graphene nanosheets
PANI	Polyaniline