Lithium sulphur (Li-S) batteries have been hailed as a potential game-changer for Electric Vehicles (EVs).
Compared to the lithium-ion (Li-ion) batteries that are currently used in EVs, Li-S batteries are much lighter and have a higher energy density.
This means that they have the potential to significantly increase the range of EVs.
Li-S batteries are not without their challenges, they are notoriously unstable, and this has been a major obstacle to their commercialisation.
But recent advances in technology have made significant progress in overcoming this challenge, and Li-S batteries are now being viewed as a viable option for Electric Vehicles.
What are the pro’s of Lithium Sulphur batteries?
Lithium sulphur batteries are much lighter and have a higher energy density than lithium ion batteries.
This means that they have the potential to significantly increase the range of Electric Vehicles.
Li-S batteries are also cheaper to produce than lithium ion batteries.
Energy is stored in a lithium-sulphur battery when positively charged lithium ions are absorbed by the sulphur electrode in a carbon matrix that is kept together with a polymer binder.
The high storage capacity ensures that the electrode expands to almost double its original dimensions when completely charged.
What are the con’s of Lithium Sulphur batteries?
The main challenge with lithium sulphur batteries is their stability.
They are notoriously unstable, and this has been a major obstacle to their commercialization.
Li-S batteries also have a shorter lifespan than lithium ion batteries.
As the Li-S battery warms up and then cools down, particles become swollen and shrink, causing them to lose cohesion.
This results in permanent deformation of the carbon matrix and polymer binder as well as particle loss due to swelling and shrinking.
The carbon matrix is a crucial component of the battery that delivers electrons to the insulating sulphur, and the polymer binds them.
When the pathways for electrons to travel across the electrode (essentially, the electrical wiring) are destroyed, the battery’s performance declines rapidly.
The difference in Li-s and Li-ion batteries?
To make the positive electrodes in lithium-ion batteries, these elements are required: rare earths, nickel, and cobalt.
Because of their scarcity, high demand, and rising costs, many of these metals are increasingly difficult to obtain.
Their mining frequently results in significant social and environmental drawbacks.
According to sources in the mining industry, significant shortages of these crucial resources are expected as early as 2022.
Sulphur, on the other hand, is quite prevalent and inexpensive.
Sulphur is one of the Earth’s most plentiful minerals, and about 70 million tonnes are produced each year by miners.
Batteries, in particular, could benefit from the element’s unique characteristics and ability to self-discharge.
Lithium-sulphur batteries also employ a distinct kind of chemical reaction, which means their energy storage capacity (known as “specific capacity”) is far superior than that of lithium-ion batteries.
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Want to know more about EV’s?
Here at MTC, we offer a variety of courses that can give you the information you need about electric and hybrid vehicles.
Hybrid Training Course, Level 1 – Raise Awareness
Hybrid/ EV Training Course, Level 2 – Light Vehicles
Hybrid Training Course, Level 2 – Buses
Hybrid Training Course, Level 2 – HGV’s
Hybrid Training Course Level 3 – Cars
The Level 1 Hybrid and Electric Training Course, is to raise awareness of Hybrid and Electric Vehicles. This course is aimed at anyone that may come into contact with Hybrid and Electric Vehicles.
Level 2 Hybrid and Electric Light Vehicle Training Course, Level 2 HGV Training Course and Level 2 Buses Training Course. The Level 2 course is aimed at mechanics and car valeters.
The Level 3 Hybrid and Electric Training Course, is aimed at technicians and mechanics.
Information about our Hybrid Courses and what we will cover:
- Safe system shut down and recommissioning.
- Methods of safe component and system test and measurement.
- Using and interpreting vehicle wiring diagrams & tech data for speedy and efficient repairs.
- Hybrid propulsion and energy generation systems.
- Brush less 3 Phase Motor form and function.
- DC and AC (3 phase) Control Systems.
- Using OEM, Pass-thru and Aftermarket Scan Tools for in vehicle system and component diagnosis.
- How to work safely on hybrid and related vehicle systems.
- How to carry out maintenance and repair activities when working on Hybrid vehicles.
- Construction and function of battery modules and related components
It is anticipated that Level 3 will be the minimum requirement in the future.
Best practice dictates that each technical staff member should be qualified to at least level 2 (service technician).
Diagnostic technicians should be qualified to level 3 (for fault diagnosis and removal, test and refit of high voltage systems).
Our trainers are experienced in the field and can provide you with all the knowledge you need.