Week 1 Understanding Different Battery Chemistry

• 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

The following table has 6 types of lithium ion cells:

1. Lithium Cobalt Oxide (LCO)
2. Lithium Manganese Oxide (LMO)
3. Lithium Nickel Cobalt Aluminium (NCA)
4. Lithium Nickel Manganese Cobalt Oxide (NMC)
5. Lithium Iron Phosphate (LFP)
6. Lithium Titanate (LTO)

Sr. no.	Name	Anode	Cathode	Seperator	Electrolyte	Anode reaction	Cathode reaction	Overall reaction
1	Lithium Cobalt Oxide(LCO)	Graphite	Lithium cobalt Oxide	Polyolefin	Ethylene Carbonate	LiC6`iff`C6+Li`+` +`e^-`	CoO2 + `Li^+ + e^-``iff`LiCoO2	`C6 + LiCoO2 iff LiC6 + CoO2`
2	Lithium Manganese Oxide (LMO)	Graphite	Lithium Manganese	Polyolefin	Halide	LiC6 `iff` `C6 + Li^+ + e^-`	MnO2 + `Li^+ + e^-``iff``LiMnO2`	`C6 + LiMn2O4 iff LiC6 + Mn2O4`
3	Lithium Nickel Cobalt Aluminium(NCA)	Graphite	Nickel Cobalt Aluminium	Polyolefin	Ethylene Carbonate	LiC6 `iff` `C6 + Li^+ + e^-`	NiCoAlO2 + `Li^+ + e^- iff LiNiMnCoO2`	C6+LiNiCoAlO2 `iff LiC6 + NiMnCoAlO2`
4	Lithium Nickel Manganese Cobalt Oxide	Graphite	Nickel Manganese	Polyolefin	Lithium Salt	LiC6 `iff` `C6 + Li^+ + e^-`	NiMnCoO2 + `Li^+ + e^-``iff`LiNiMnCoO2	C6+LiNiMnCoO2`iff`LiC6 + NiMnCoO2
5	Lithium Iron phosphate (LFP)	Graphite	Lithium Iron Phosphate	Polyolefin	Ethylene Carbonate	LiC6 `iff` `C6 + Li^+ + e^-`	FePO4 + `Li^+ + e^-``iff LiFePO4`	C6+LiFePO4`LiC6+FePO4`
6	Lithium Titanate(LTO)	Graphite	Lithium Titanate	Polyolefin	Lithium salt	Li4Ti5O12 `iff Ti5O12 +4Li^+ + 4e^-`	4MnO4 `+ 4Li^+ + 4e^-``iff 4LiMn2O4`	4Mn2O4 + Li4Ti5O12 `iff 4 LiMn2O4 + Ti5O12`

1. Lithium Iron Phosphate batteries use phosphate as the cathode material and a graphitic carbon electrode as the anode. LFP batteries have a long life cycle with good thermal stability and electrochemical performance.

What Are They Used For:

LFP battery cells have a nominal voltage of 3.2 volts, so connecting four of them in series results in a 12.8-volt battery. This makes LFP batteries the most common type of lithium battery for replacing lead-acid deep-cycle batteries.

Benefits:

There are quite a few benefits to lithium iron phosphate batteries that make them one of the most popular options for applications requiring a large amount of power. The primary benefits, however, are durability, a long life cycle, and safety.

LFP batteries typically have a lifecycle rating of 2,000 cycles or more. Unlike lead-acid batteries, depth of discharge has a minimal impact on the lifespan of LFP batteries. Most LFP manufacturers rate their batteries at 80% depth of discharge, and some even allow 100% discharging without damaging the battery.

Dragonfly Energy lithium iron phosphate batteries can be discharged 100% without damage.

The materials used in lithium iron phosphate batteries offer low resistance, making them inherently safe and highly stable. The thermal runaway threshold is about 518 degrees Fahrenheit, making LFP batteries one of the safest lithium battery options, even when fully charged.

Drawbacks:

There are a few drawbacks to LFP batteries. The first is that compared to other lithium battery types, they have a relatively low specific energy. Their performance can also suffer in low temperatures. Combining the low specific energy and reduced performance in cold temperatures means LFP batteries may not be a great fit in some high cranking applications.

2. Lithium Cobalt Oxide

Lithium cobalt oxide (LCO) batteries have high specific energy but low specific power. This means that they do not perform well in high-load applications, but they can deliver power over a long period.

What Are They Used For:

LCO batteries were common in small portable electronics such as mobile phones, tablets, laptops, and cameras. However, they are losing popularity to other types of lithium batteries due to the high cost of cobalt and concerns around safety.

Laptops and other portable electronics commonly use LCO batteries

Benefits:

The key benefit to LCO batteries is their high specific energy. This allows them to deliver power over a relatively long period under low-load applications.

Drawbacks:

LCO batteries have some significant drawbacks resulting in them becoming less popular in recent years. First, LCO batteries suffer from a relatively short lifespan, usually between 500-1,000 cycles. Additionally, cobalt is fairly expensive. Expensive batteries that don’t last a long time are not cost-effective.

LCO batteries also have low thermal stability, which leads to safety concerns. Furthermore, their low specific power limits the ability of LCO batteries to perform in high-load applications.

3. Lithium Manganese Oxide

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.

What Are They Used For:

LMO batteries are commonly found in portable power tools, medical instruments, and some hybrid and electric vehicles.

Cordless power tools often use the lithium manganese oxide battery type.

Benefits:

LMO batteries charge quickly and offer high specific power. This means they can deliver higher current than LCO batteries, for example. They also offer better thermal stability than LCO batteries, meaning they can operate safely at higher temperatures.

One other benefit to LMO batteries is their flexibility. Tuning the internal chemistry allows LMO batteries to be optimized to handle high-load applications or long-life applications.

Drawbacks:

The main downside to LMO batteries is their short lifespan. Typically, LMO batteries will last 300-700 charge cycles, significantly fewer than other lithium battery types.

4. Lithium Nickel Manganese Cobalt Oxide

Lithium nickel manganese cobalt oxide (NMC) batteries combine the benefits of the three main elements used in the cathode: nickel, manganese, and cobalt. Nickel on its own has high specific energy but is not stable. Manganese is exceptionally stable but has a low specific energy. Combining them yields a stable chemistry with a high specific energy.

What They Are Used For:

Similar to LMO batteries, NMC batteries are popular in power tools as well as electronic powertrains for e-bike, scooters, and some electric vehicles.

Benefits:

The benefits of NMC batteries include high energy density and a longer lifecycle at a lower cost than cobalt-based batteries. They also have higher thermal stability than LCO batteries, making them safer overall.

Drawbacks:

The major drawback to NMC batteries is that they have a slightly lower voltage than cobalt-based batteries.

Electric cars, like Teslas, often use NMC and NCA lithium batteries.

5. Lithium Nickel Cobalt Aluminium Oxide

Lithium nickel cobalt aluminum oxide (NCA) batteries offer high specific energy with decent specific power and a long lifecycle. This means they can deliver a relatively high amount of current for extended periods.

What They Are Used For:

The ability to perform in high-load applications with a long battery life makes NCA batteries popular in the electric vehicle market. Specifically, NCA is the battery of choice for Tesla.

Benefits:

The biggest benefits of NCA batteries are high energy and a decent lifespan.

Drawbacks:

With NCA technology, the batteries aren’t as safe as most other lithium technologies and are expensive in comparison.

6. Lithium Titanate

All of the previous lithium battery types we have discussed are unique in the chemical makeup of the cathode material. Lithium titanate (LTO) batteries replace the graphite in the anode with lithium titanate and use LMO or NMC as the cathode chemistry.

The result is an extremely safe battery with a long lifespan that charges faster than any other lithium battery type.

What Are They Used For:

Many applications use LTO batteries. Electric vehicles and charging stations, uninterrupted power supplies, wind and solar energy storage, solar street lights, telecommunications systems, and aerospace and military equipment are just some of the use cases.

Lithium titanate batteries offer extremely wide operating temperatures making them useful in aerospace applications.

Benefits:

LTO batteries offer many benefits, including fast charging, an extremely wide operating temperature, a long lifespan, and superb safety because of their stability.

Drawbacks:

There are a couple of significant hurdles for LTO batteries to overcome. They offer low energy density, which means it stores a lower amount of energy relative to its weight when compared to some other lithium technologies. Additionally, they are very expensive.

• the differences between each type of Li+ion battery based on their characteristicshttps://dragonflyenergy.com/types-of-lithium-batteries-guide/

• This chart shows the 5-point scale of various lithium batteries, with 0 being the least desirable to 5 being the most desirable technology.
• If you see the lithium nickel Cobalt aluminium chemistry , you can find that specific power and specific energy are quite sufficient but they are having concern related to safety.
• So, the overall performance is also compromised. Their life-cycle is usually the highest. And the cost is also going to be the parameter. When it refers to cost the less points means the cost is higher. If it has one point in terms of cost , so they are the costliest in terms of cells.
• The technology which has the most highest area i the NMC technology. Lithium Nickel Manganese Cobalt is the one of the most popular chemistries and widely used for automotive applications because it covers most of the parameters and it has larger area.
• Lithium Manganese Oxide has sufficient amount of specific energy and specific power but its cost iss also high and the life span is less. Life-span of (LFP) and LTO is very high and has higher number of life cycles. So the charge discharge cycles for these two are very high. Therefore their cost is also higher.