Week 1 Understanding Different Battery Chemistry
AIM:
1.Prepare a table which includes materials & chemical reactions occurring at the anode and cathode of LCO, LMO, NCA, NMC, LFP and LTO type of lithium ion cells.Give your detailed explanation on it
2.Compare the differences between each type of Li+ion batteries based on their characteristics
INTRODUCTION:
STUDY:1
A lithium-ion (Li-ion) battery is an advanced battery technology that uses lithium ions as a key component of its electrochemistry. During a discharge cycle, lithium atoms in the anode are ionized and separated from their electrons. The lithium ions move from the anode and pass through the electrolyte until they reach the cathode, where they recombine with their electrons and electrically neutralize. The lithium ions are small enough to be able to move through a micro-permeable separator between the anode and cathode. In part because of lithium’s small size (third only to hydrogen and helium), Li-ion batteries are capable of having a very high voltage and charge storage per unit mass and unit volume.
Li-ion batteries can use a number of different materials as electrodes. The most common combination is that of lithium cobalt oxide (cathode) and graphite (anode), which is most commonly found in portable electronic devices such as cellphones and laptops. Other cathode materials include lithium manganese oxide (used in hybrid electric and electric automobiles) and lithium iron phosphate. Li-ion batteries typically use ether (a class of organic compounds) as an electrolyte.
TYPES OF LI-ION BATTARY:
A lithium-ion battary is a family of rechargeable battery types in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging. Chemistry, performance, cost and safety characteristics vary across lithium-ion battery types.
Types of lithium-ion batteries
Lithium-ion batteries come in a variety of shapes and sizes, and not all of them are made equal. Below are descriptions of six different lithium-ion battery types, as well as their compositions and common applications.
Lithium Cobalt Oxide
Lithium cobalt oxide batteries are manufactured from lithium carbonate and cobalt and are also known as lithium cobaltate or lithium-ion cobalt batteries. These batteries are used in cell phones, laptops, and electronic cameras because of their high specific energy. They have a cobalt oxide cathode and a graphite carbon anode, and lithium ions migrate from the anode to the cathode during discharge, with the flow reversing when the battery is charged.
This battery has a few disadvantages, including short battery life and low specific power. We also want to let you know that these batteries are not as safe as other varieties. Despite this, they are a popular choice for cell phones and other portable electronic devices because of their properties.
Lithium Manganese Oxide
Lithium manganese oxide batteries are sometimes known as lithium manganate or lithium-ion manganese batteries, or li-manganese or manganese spinel batteries.
High-temperature stability distinguishes lithium manganese oxide batteries from others, which are also safer than other lithium-ion battery types. As a result, they’re frequently found in medical equipment and devices, but they can also be used in power tools, electric motorcycles, and other applications. Lithium manganese oxide batteries can also be used to power laptop computers and electric vehicles.
Lithium Iron Phosphate (LFP)
Phosphate is used as a cathode in lithium iron phosphate batteries, often known as li-phosphate batteries. They have low resistance qualities, which improve their thermal stability and safety.
Durability and a long lifecycle are other advantages – fully charged batteries can be kept with no effect on the battery’s overall charge life. When the lengthy battery life of Li-phosphate batteries is considered, they are frequently the most cost-effective option. The lower voltage of the lithium-phosphate battery, on the other hand, means that it has less energy than other lithium batteries.
As a result, these batteries are frequently used in electric bikes and other applications requiring a long lifecycle and high levels of safety. These batteries are also commonly used in electric vehicles.
Lithium Nickel Manganese Cobalt Oxide (NMC)
NMC batteries, like other lithium-ion battery types, can have a high specific energy density or a high specific power. They can’t have both features, though. This battery is most commonly seen in power tools and automobile powertrains.
60% nickel, 20% manganese, and 20% cobalt are commonly the cathode combination ratios. This means that the cost of the raw material is lower than for other lithium-ion battery solutions, as cobalt may be fairly costly. Because some battery manufacturers plan to convert their battery chemistry to a larger percentage of nickel to utilize less cobalt, the price of these batteries may drop even more in the future. Because of its low self-heating rate, this battery type is often used in electric vehicles.
Lithium Nickel Cobalt Aluminum Oxide
NCA batteries, or lithium nickel cobalt aluminum oxide batteries, are making their way in electric vehicles and grid storage.
Although NCA batteries are not widely used in consumer electronics, they have great potential in the automobile industry. NCA batteries offer a high-energy choice with a long lifespan, but they are less safe than other lithium-ion battery types and are rather expensive. To ensure driver safety, NCA batteries must be accompanied by monitoring systems.
Given the widespread use of NCA batteries in electric vehicles, demand for these batteries may increase as the number of electric vehicles grows.
Lithium Titanate
Finally, lithium titanate, often known as li-titanate, is a type of battery that has a growing number of uses. Because of its superior nanotechnology, the lithium-titanate battery has an extremely rapid recharge time.
Li-titanate batteries are being employed by makers of electric vehicles and bicycles, and this type of battery has the potential to be used in electric buses for public transit. However, these batteries have a lower intrinsic voltage or energy density than other lithium-ion battery types, which might cause problems when it comes to efficiently power automobiles. Despite this, lithium titanate batteries have a higher density than non-lithium-ion batteries, which is a benefit.
STUDY:2
Lithium-Ion Batteries (LIBs)
There are four components in a lithium-ion cell: anode, cathode, separator, and the nonaqueous electrolyte. During the charging process, the lithium ions move from the cathode, through the electrolyte, to the anode, and then return during discharge. Lithium-ion battery cells are manufactured as stack or cylindrical cells.
Lithium-ion batteries have the characteristics of high-power density, long life, low self-discharge, low maintenance costs and low environmental impact. However, lithium has high reactivity, so there are technical limitations related to the safety of building batteries
