VRFBs	vanadium redox flow batteries
ICFBs	iron-chromium redox flow batteries
ZRFBs	zinc-based redox flow batteries
ORFBs	organic redox flow batteries
EE	energy efficiency
CE	coulombic efficiency
VE	voltage efficiency
SPEEK	sulfonated poly(ether ether ketone)
PBI	polybenzimidazole
PEG	polyethylene glycol
COF	covalent organic framework
MOF	metal-organic framework
LDH	layered double hydroxide
ZNFs	zeolite imidazole framework nanosheets
MWCNT	multi-walled carbon nanotube
CF	carbon felt
GF	graphite felt
CP	carbon paper
CC	carbon cloth
HER	hydrogen evolution reaction
PDTA	1,3-propanediaminetetraacetate