Week 1 Understanding Different Battery Chemistry
1. ANSWER:
1. 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, from electronic devices to laptops and phone batteries. The majority of lithium-ion batteries for portable devices are cobalt based. The system contains a cobalt oxide cathode (positive electrode) and graphite carbon anode (negative electrode).
Advantages and disadvantages of LCO batteries
The main advantages of LCO batteries are:
- High energy density.
- Long runtime making it optimum for new technologies
The main disadvantages of LCO batteries are:
- It has a relatively low discharge current so a high load can lead to pack overheating
- The safety circuit of the LCO battery is typically limited to a 1C for charging and discharging.
- The internal resistance increases with cycling and aging. This high internal resistance can cause the battery to become unserviceable due to a large voltage drop under the load after a couple of years of use.
2. 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 can deliver a lot of energy in a short period, which makes them extremely useful for use in power tools like drills. In 1996, lithium manganese oxide was first used as a cathode material. This structure formed a three-dimensional spinel structure, which 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, etc. Because of their thermal resistance and higher safety. LMO batteries can also be used for laptops and electric cars.
Advantages and disadvantages of LMO batteries
The main advantages of the LMO batteries are:
- High-temperature stability and safety relative to other Li-ion types as it has integrally high thermal stability and thus needs less safety circuitry than a cobalt system.
- High rate capability due to low internal cell resistance which benefits fast charging and high current discharging.
The main disadvantage of the LMO batteries is:
- Lower capacity relative to the cobalt-based system, yet it still has an energy density that is nearly 50% higher than the nickel-based system.
3. 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 vehicle's 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.
Advantages and disadvantages of NCA batteries
The main advantages of the NCA batteries are:
- High specific energy
- Reasonably good specific power
- Long life span
- NCA cathodes contain the most energy amount by weight and volume (as NMC).
The main disadvantages of the NCA batteries are:
- Less safety than other Li-ion battery types (they require extra safety features and circuits for use in electric cars for example)
- Higher cost in comparison to other Li-ion battery types
4. 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 to achieve low internal resistance yet provides low specific energy. Joining the metals increases the strengths of 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.Advantages and disadvantages of NMC batteries
The main advantages of NMC batteries are:
- NMC cells provide a longer life cycle
- Lower cost
- Higher energy density
- NMC cathodes contain the most energy amount by weight and volume.
The main disadvantages of NMC batteries are:
- Adding silicon to graphite has the downside of making the anode grow and shrink through charging and discharging, leading to mechanical instability of the cell.
- Slightly lower voltage than cobalt systems
5. 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 a restriction as is in cars- because the battery is less energy dense yet cheaper to manufacture than other Li-ion battery 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. 
Advantages and disadvantages of LFP batteries
The main advantages of the LFP batteries are:
- Durability
- Long lifecycle
- Low cost
- Excellent safety
The main disadvantages of the LFP batteries are:
- More tolerant to conditions of full charge and less stressed at higher voltage for a long time.
- lower nominal voltage which reduces the specific energy
- Higher self dischargeselfdischarge self-discharge than other types of Li-ion batteries, which causes balancing issues with aging.
6. 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 grid 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.
Advantages and disadvantages of LTO batteries
The main advantages of the LTO batteries are:
- Excellent low-temperature discharge characteristics
- Zero strain property, no formation of SEI film nor lithium plating when charging at low temperature or fast charging
- Long lifetime
- Fast charge capability and wide temperature range
- Among the safest types of Li-ion batteries
The main disadvantages of the LTO batteries are:
- High cost
- Lower inherent voltage or lower energy density.
COMPARISION:
| Cathode material | Chemistry | Raw material cost (＄/kg) | Energy density of LIB cells (Whkg−1) |
Stability/ Safety |
Lifetime | Applications |
| LCO (Lithium Cobalt Oxide) | LiCoO2 | 36 | 200 | Low | Poor | Mobile phones, laptops, camcorders |
| NMC (Lithium Nickel Manganese Cobalt) | LiNi1/3 Mn1/3 CO1/3O2 (NMC111) | 19 | 130–241 | Low | Good | Electric vehicles (GM, Ford, Volkswagen, Toyota, Hyundai), power tools, e-bikes, energy storage systems |
| LiNi0.6 Mn0.2 CO0.2O2 (NMC622) | 16–19 | 130–241 | Med | Good | ||
| LiNi0.8 Mn0.1 CO0.1O2 (NMC811) | 16 | 130–241 | Med | Good | ||
| LMO (Lithium Manganese Oxide) | LiMn2O4 | 5 | 150 | Med-High | Poor | Electric vehicles (e.g., Nissan Leaf, Renault Zoe, BMW), power tools, medical devices, e-bikes, e-scooters |
| LFP (Lithium Iron Phosphate) | LiFePO4 | 6 | 120–140 | High | Good | Electric vehicles (Chinese and early US cars), electric buses, power tools, utility vehicles, lead-acid replacement |
| NCA (Lithium Nickel Cobalt Aluminum Oxide) | LiNixCoyAlzO2 | 20 | 236–260 | Med | Poor-Good | Electric vehicles (e.g., Tesla), stationary applications, laptops, medical devices, e-scooters |