Understanding Different Battery Chemistry

Question 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.

Answer :-

Battery Type	Full Name	Material At Anode	Material at Cathode	Electrolyte
LCO	Lithium Cobalt Oxide (LiCoO2)	Graphite Carbon	Cobalt oxide	Ethylene Carbonate
LMO	Lithium Manganese Oxide (LiMn2O4)	Graphite	lithium manganese oxide	Lithium Halide
NCA	Lithium Nickel Cobalt Aluminum Oxide (LiNiCoAlO2)	Graphite	Lithium Nickel Cobalt Aluminum Oxide(-9% Co)	Ethylene Carbonate
NMC	Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2)	Graphite	lithium nickel manganese cobalt oxide	Lithium Salt
LFP	Lithium Iron Phosphate(LiFePO4)	Graphite	Lithium Iron Phosphate(LiFePO4)	Ethylene Carbonate
LTO	Lithium Titanate (Li2TiO3)	Li2TiO3 (titanate) anode	lithium manganese oxide or NMC	Lithium Salt

The reactions mentioned are during the discharge state of the batteries.

Battery Type	Reaction At Anode	Reaction at Cathode
LCO
LMO	Li → Li++e-	MnO2+Li++e- → MnOOLi
NCA
NMC
LFP
LTO

Question 2:- Compare the differences between each type of Li+ion batteries based on their characteristics.

Answer :-

Some of the battery terms used for Comparision of different batteries are

1. Voltage :- Battery voltage is the amount of electrical potential a battery holds, measured in volts.

2. C- rate :- The battery C Rating is the measurement of current in which a battery is charged and discharged at. The capacity of a battery is generally rated and labelled at the 1C Rate (1C current), this means a fully charged battery with a capacity of 10Ah should be able to provide 10 Amps for one hour.

3. Cycle life :- The cycle life of batteries is the number of charge and discharge cycles that a battery can complete before losing performance.

4. Specific Energy :- The gravimetric energy density or the specific energy of a battery is a measure of how much energy a battery contains in comparison to its weight, and is typically expressed in Watt-hours/kilogram (W-hr/kg).

5. Thermal runaway :- Thermal runaway is a chain reaction within a battery cell that can be very difficult to stop once it has started. It occurs when the temperature inside a battery reaches the point that causes a chemical reaction to occur inside the battery. This chemical reaction produces even more heat, which drives the temperature higher, causing further chemical reactions that create more heat.

Comparision of different battery Characterstics	Lithium Cobalt Oxide (LiCoO2)	Lithium Manganese Oxide (LiMn2O4)	Lithium Nickel Cobalt Aluminum Oxide (LiNiCoAlO2)	Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2)	Lithium Iron Phosphate(LiFePO4)	Lithium Titanate (Li2TiO3)
Voltages	3.60V nominal; typical operating range 3.0–4.2V/cell	3.70V (3.80V) nominal; typical operating range 3.0–4.2V/cell	3.60V nominal; typical operating range 3.0–4.2V/cell	3.60V, 3.70V nominal; typical operating range 3.0–4.2V/cell, or higher	3.20, 3.30V nominal; typical operating range 2.5–3.65V/cell	2.40V nominal; typical operating range 1.8–2.85V/cell
C-rate (Charge)	0.7–1C, charges to 4.20V (most cells); 3h charge typical. Charge current above 1C shortens battery life.	0.7–1C typical, 3C maximum, charges to 4.20V (most cells)	0.7C, charges to 4.20V (most cells), 3h charge typical, fast charge possible with some cells	0.7–1C, charges to 4.20V, some go to 4.30V; 3h charge typical. Charge current above 1C shortens battery life.	1C typical, charges to 3.65V; 3h charge time typical	1C typical; 5C maximum, charges to 2.85V
C- rate( Discharge)	1C; 2.50V cut off. Discharge current above 1C shortens battery life.	1C; 10C possible with some cells, 30C pulse (5s), 2.50V cut-off	1C typical; 3.00V cut-off; high discharge rate shortens battery life	1C; 2C possible on some cells; 2.50V cut-off	1C, 25C on some cells; 40A pulse (2s); 2.50V cut-off (lower that 2V causes damage)	10C possible, 30C 5s pulse; 1.80V cut-off on LCO/LTO
Cycle Life	500-1000	300–700	500	1000–2000	2000 and higher (related to depth of discharge, temperature)	3,000–7,000
Thermal Runaway	150°C	250°C (482°F) typical. High charge promotes thermal runaway	150°C (302°F) typical, High charge promotes thermal runaway	210°C (410°F) typical. High charge promotes thermal runaway	270°C (518°F) Very safe battery even if fully charged	One of safest Li-ion batteries
Specific Energy	150–200Wh/kg.	100–150Wh/kg	200-260Wh/kg; 300Wh/kg predictable	150–220Wh/kg	90–120Wh/kg	50–80Wh/kg
Applications	Mobile phones, tablets, laptops, cameras	Power tools, medical devices, electric powertrains	Medical devices, industrial, electric powertrain (Tesla)	E-bikes, medical devices, EVs, industrial	Portable and stationary needing high load currents and endurance	UPS, electric powertrain (Mitsubishi i-MiEV, Honda Fit EV), solar-powered street lighting
Cost per unit specific energy	~ $100 per kWh	$114 per kWh-	$350 per kWh	$420 per kWh	$580 per kWh	$1,005 per kWh