Week 1 Understanding Different Battery Chemistry

Aim:

To 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.

Lithium-ion:

A lithium-ion battery or Li-ion battery is a type of rechargeable battery composed of cells in which lithium ions move from the negative electrode through an electrolyte to the positive electrode during discharge and back when charging.

Working Principle of Lithium-ion Battery

When the battery is charged, the ions tend to move towards the negative electrode or the anode. When the battery gets completely discharged, the lithium ions return back to the positive electrode, i.e., the cathode.

Lithium-ion batteries are commonly used for portable electronics and electric vehicles and are growing in popularity for military and aerospace applications. or NMC) may offer longer lives and may have better rate capability. Such batteries are widely used for electric tools, medical equipment, and other roles.

Types of Li-ion batteries

LCO (Lithium cobalt ):

LCO stands for Lithium cobalt battery. Lithium cobalt oxide is one of the most common Lithium-ions, it has a chemical symbol which is LiCoO2 and is abbreviated as LCO. For simplification, Li-cobalt –which is the short term- can also be used for this type battery. Cobalt is the core active material which defines the character of the battery.

LCO batteries technology and applications:

LCO (Lithium cobalt oxide) was invented in the year 1991. Its anode material is LiaC6, the cathode material is LibCoO2 and the carrier is Li+.It is used in various applications ranging from electronic devices to all laptops and phone batteries.The majority of lithium-ion batteries for the portable devices are cobalt based. The system contains a cobalt oxide cathode (positive electrode) and graphite carbon anode (negative electrode).

LMO (Lithium Magnese):

Lithium Manganese Oxide (LMO) batteries use lithium manganese oxide as the cathode material. This chemistry creates a three-dimensional structure that improves ion flow, lowers internal resistance, and increases current handling while improving thermal stability and safety.

LMO batteries technology and applications:

LMO (Lithium magnesium oxide) was invented in the year 1996. Its anode material is LiaC6, the cathode material is LibMn2O4 and the carrier is Li+. It is used in different applications like power tools and electric cars.LMO batteries have the ability to deliver a lot of energy in a short period of time, which makes them extremely useful for use in power tools like drills.In 1996, lithium manganese oxide was first used as a cathode material. A three dimensional spinel structure was formed by this structure, this improves the flow of ions between the electrodes. The high flow decreases the internal resistance and increases loading capability.LMO batteries are usually used in medical devices and equipment, power tools, electric bikes and more. Because of their thermal resistance and higher safety. LMO batteries can also be used for laptops and electrical car

NCA:

Lithium nickel cobalt aluminum oxide is an excellent material that enhances the quality of lithium-ion batteries and enables them to function more effectively and efficiently. They add up to their productivity and enhance their work mechanism so that they get a better environment to work in and perform in excellent ways.

NCA battery technology and applications

NCA (Lithium nickel cobalt aluminum oxide) battery was invented in the year 1999. Its anode material is LiaC6, the cathode material is LibNi0.8Co0.15Al0.05O2 and the carrier is Li+. It is used in different applications like power grid applications, medical devices and electric cars. Most notably Tesla deploys NCA batteries in their electric vehicles system. NCA batteries can store the same amount of energy as NMC.NCA batteries are not widely common in the consumer industry, but are quite promising in the electric car industry.

NMC:

NMC stands for Lithium Nickel Manganese Cobalt Oxide battery. (LiNiMnCoO2)The cathode combination of NMC (nickel-manganese-cobalt) is among the most successful Li-ion systems. The NMC systems can serve as a Power Cell or an Energy Cell.

NMC batteries technology and applications

NMC (Nickel Manganese Cobalt Oxide) battery was invented in the year 2008. Its anode material is LiaC6, the cathode material is LibNi1–x–yCoxMnyO2 and the carrier is Li+. They commonly use it in different applications like Energy Systems and electric cars.NMC combines the best of nickel and manganese. Nickel has high specific energy but poor stability; manganese can form a spinel structure so as to achieve low internal resistance yet provides a low specific energy. Joining the metals increases the strengths from both parts.NMC batteries are widely used for power tools, energy storage systems (EES) which need frequent cycling and electrical power-trains like automotives. The cathode combination typically used is 1-1-1 which means one third nickel, one third manganese and one third cobalt. This reduces the raw material cost due to lowered content of cobalt. Another known combination for NCM is 5-3-2 (5 parts nickel, 3 parts cobalt and 2 parts manganese). Other combinations are also possible.

LFP:

Lithium Ferro Phosphate technology (also known as LFP or LiFePO4), which appeared in 1996, is replacing other battery technologies because of its technical advantages and very high level of safety.

LFP batteries technology and applications

LFP (Lithium iron phosphate) was invented in the year 1996. Its anode material is LiaC6, the cathode material is LibFePO4 and the carrier is Li+. They use LFP batteries in different applications like electric cars, electric buses and electric trucks. The LFP is ideal for use in electric trucks or buses – as volume or weight isn’t really a restriction as is in cars- because the battery is less energy dense yet cheaper to manufacture than other Li-ion batteries types. In addition, they use LFP batteries in other applications like electric motorcycles which need a longer life cycle and increased safety. LFP provides good electrochemical performance with lower resistance. This is enabled by the nano scale phosphate cathode material. The main benefits are long cycle life, higher current rating and thermal stability which means extra safety.

Li-titanate oxide (LTO) replaces the graphite in the anode of the typical Li-Ion battery and forms the materials into a spinel 3D crystal structure. Having a nominal a cell voltage of 2.40V, it releases a high current discharge current that is 10 times the capacity of the other types of lithium batteries.

LTO batteries technology and applications

LTO (Lithium tintate) was invented in the year 2008. Its anode material is Li4+aTi5O12, the cathode material is LibFePO4 and the carrier is Li+. They use it in different applications like UPS, electrical power trains, solar powered street lights, fast charge stations and forklifts. Other applications for LTO batteries include aerospace and military uses, and more importantly wind and solar energy storage and smart grids creation.Li-titanate is used instead of the graphite in the anode of a common lithium-ion battery and the material is formed into a spinel structure. The cathode material is either LMO or NMC.As mentioned, they use li-titanate batteries in electric vehicles, yet LTO batteries have lower energy density than other Li-ion battery types, which can be a disadvantage in efficiently powering vehicles. Still, the density of LTO batteries is higher than other non-Li-ion batteries.

Materials & chemical reactions occurring at the anode and cathode of LCO, LMO, NCA, NMC, LFP and LTO type of lithium ion cells:

Differences between each type of Li+ion batteries based on their characteristics :

Lithium-ion Battery types	SP	SE	SF	LS	CS	PF
LCO (Lithium cobalt )	L	H	L	L	L	M
Lithium Manganese Oxide (LMO)	M	M	M	L	L	L
NMC ( Lithium Nickel Manganese Cobalt Oxide)	M	H	M	M	L	M
LFP (Lithium iron phosphate)	H	L	H	H	L	M
Lithium nickel cobalt aluminum oxide	M	H	L	M	M	M
LTO (Lithium tintate)	M	L	H	H	H	H

• SP - Specific Power
• SE - Specific Energy
• SF - Safety
• LS - Lifespan
• CS - Cost
• PF - Performance
• L - Low
• M - Moderate
• H - stands

Conclusion:

LCO (Lithium cobalt Oxide):

It has high specific energy as compared to the other batteries which makes it the preferred choice for laptops and mobile phones.It also has a low cost and a moderate performance.However,it is highly unfavourable in all the other aspects when compared to thr other Li-ion batteries.It has a low specific power low in safety and a low lifespan.

Lithium Manganese Oxide (LMO)

Has a moderate specific power,moderate specific energy and a moderate level of safety when compared to the other types of lithium-ion batteries.It has the added advantage of a low cost.The downsides are its low performance and low lifespan.Its usually used in medical devices and power tools.

NMC ( Lithium Nickel Manganese Cobalt Oxide):

Has two major advantages as compared to the other batteries. The first one is its high specific energy which makes it desirable in electric powertrains,electric vehicles and electric bikes.the other is its low cost.Its moderate in terms of specific power safety lifespan and performance when compared to the other Li-ion batteries.It can be optimized to either have high specific power or high specific energy.

LFP (Lithium iron phosphate):

Only has one major disadvantage when compared to the other types li-ion batteries and its low specific energy in other than that, it has a moderate to high specific power offers a high level of safety and a highn lifespan also comes at a low cost.The performance of this battery is also moderate. Often employed in elctric motor cyclrs and other applicstion that requires a long lifespan and safety at the maximum.

Lithium Nickel Cobalt Aluminum Oxide

Offers one strong advantage as compared to the five other batteries and that is high specific energy. It is pretty moderate in the rest of the characteristics like performance, cost, specific power, and lifespan. The only downside to this battery type is its low level of safety. Its high specific energy and moderate lifespan make it a good candidate for electric powertrains.

Lithium Titanate

Offers high safety, high performance, and a high lifespan which are very important features every battery should have. Its specific energy is low compared to the five other lithium-ion batteries but it compensates for this with a moderate specific power. The only major disadvantage of lithium titanate as compared to the other lithium-ion batteries is its extremely high cost. Another important feature of this battery worthy of mention is its remarkably fast recharge time. It can be used for storing solar energy and creating smart grids.