Nomenclature	Name	Unit
A	Helmholtz free energy	J
B	magnetic field	T
C	Heat capacity	J/K
F	Faraday’s constant	C/mol
G	Gibbs free energy	J
I	discharge/charge current or rate	A
m	mass	kg
n’	number of charge species
M	magnetic dipole moment	J/T
N, Nk	number of moles of substance	mol
P	pressure	Pa
q	charge	Ah
Q	heat	J
R	gas constant	J/mol·K
S	entropy or entropy content	J/K (Wh/K)
$\mathbb{S}$	entropy generation function	J/K (Wh/K)
S’	entropy generation or production	J/K (Wh/K)
t	time	sec
T	temperature	°C or K
U	internal energy	J
v	voltage	V
V	volume	m3
W	work	J
Z	thermodynamic state variable
Symbols
μ	chemical potential
ζ	phenomenological variable
ρ	density
Subscripts & acronyms
0	initial
c	specific heat capacity
d	diffusion
e	flow
f	final
ECT, VT	Electro-Chemico-Thermal
MST, μT	Micro-Structuro-Thermal
rev	reversible
irr	irreversible
phen	phenomenological
DEG	Degradation-Entropy Generation
PEG	Phenomenological Entropy Generation
NLGI	National Lubricating Grease Institute