Lecture 7 Notes: Statistical Thermodynamics
Open circuit voltage of galvanic cell is
To understand compositional effects on
, we need to consider some simple statistical model.
1. Lattice gas
We consider a lattice gas of N indistinguishable finite-sized p
Lecture 9 Notes: Fuel Cells and Lead-Acid Batteries
Were going to calculate the open circuit voltage of two types of
elec-trochemical system: polymer electrolyte membrane (PEM) fuel cells
and lead-acid batteries. To do this, were going to make use of two
Lecture 6 Notes: Impedance of Electrodes
1. Flat Electrodes
In the previous lecture, we leant about impedance spectroscopy. Electrochemical
impedance spectroscopy is the technique where the cell or electrode impedance is platted
versus frequency. Thus, th
Lecture 4 Notes: Dynamics of Equivalent Circuits
1. Simple Equivalent Circuit for a Battery
Batteries have a finite charge capacity Qmax. So the open circuit voltage is dependent
upon the current charge state Q. Figure 1 shows a typical dependence of the
Lecture 1 Notes: Basic Physics of Galvanic Cells
1. Electrochemical Cells and Their Operations
Faradaic Reaction
: An electrochemical reaction that involves charge transfer
Electrochemical Cell : Two half reactions involving charge transfer, connected via
Lecture 3 Notes: Electrochemical Energy Storage
Stored
chemica
l energy
(finite
Q)
Discharging
OI
A
B
Charging
Figure 1: Electrochemical Energy Storage
A simple example of energy storage is capacitor. Figure 2 shows the basic circuit for
capacitor dischar
Lecture 2 Notes: Electrochemical Energy
Conversion
Galvanic cells convert different forms of energy (chemical fuel, sunlight, mechanical
pressure, etc.) into electrical energy and heat. In this lecture, we are interested in some
examples of galvanic cells
Lecture 10 Notes: Li-ion Batteries
In the previous section we considered the open-circuit voltage of
fuel cells and primary batteries. In this section we will discuss the opencircuit voltage of secondary (rechargeable) Li-ion batteries, or rocking
chair"
Lecture 5 Notes: Impedance spectroscopy
Last time we talked about the non-linear response to DC voltage, and today we
will discuss about the AC linear response at frequency . A simplified model of
voltage response of galvanic cell can be written as
V(I,Q)
Lecture 8 Notes: The Nernst Equation
1
Chemical Activity
In general, we can dene the chemical activity of species i as follows,
i =
G
Ni
= kB T log(ai ) + zi e (per particle)
(1)
Nj ,T,P,
Alternatively, we can consider the chemical activity per mole, in w