Week 1 Understanding Different Battery Chemistry
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
ANS
*BATTERY IS a power source consisting of one or more electrochemical cells with external connections for power electrical devices such as flash lights,mobile phones etc.
* lithium ion battery is a type of rechargeable battery.it is used in power electronics and EVS.
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*LITHIUM COBALT OXIDES IS A Chemical compound with formula licoo2.
oltage-3.60 V nominal
specific energy- 150-200wh/kg
charge rate -0.7-1c 3h charge rypical
discharge=1c v cut off.
cycle life- 500-100
thermal runaway- 150*
application-mobile phones,tablet
at anode lithium is oxidized.its ions are released from the carbon along with electons.
LMO-lithium cell uses manganes oxides.they function thru same intercalation.deintercalation mechanism as the othe commercialized secondary battery technogies.cathodes based on manganes oxide component are earth abundant inexpensive.
voltage-3.70 V nominal
specific energy- 100-150wh/kg
charge rate -0.7-1c 3h charge typical
discharge=1c ,10 c possible.
cycle life- 300-700
thermal runaway- 250*
application-power tools,medical devicew
*NCA-NCA are used as active material on positive pole they are mixed oxide comprising the cations of the chemical element li,N,CO,AL.
at the anode lithium is oxidised,
oltage-3.60 V nominal
specific energy- 200-260wh/kg
charge rate -0.7-1c high discharge rate shortens life.
discharge=1c, 3vv cut off.
cycle life- 500
thermal runaway- 150*
application-mobile industrial,electric,powertrain
NMC- in this composition <5% excess lithium. the nickle is in more oxidized state for charge balance.
voltage-3.60 V nominal
specific energy- 150-220wh/kg
charge rate -0.7-1c 3h charge rypical
discharge=1c ,2c possible.
cycle life- 1000-2000
thermal runaway- 210*
application-elinks,EVS
LFP- IT IS MORE TOLERANT TO FULL CHARGE CONDITIONS
Voltage-3.20 TO 3.3 VV nominal
specific energy- 90-120wh/kg
charge rate -1c ,25Cl
discharge=1c v cut off.
cycle life- 2000 &MORE
thermal runaway- 270*
application-PORTABLE AND STATIONARY NEEDING HIGH LOAD CURRENT
*LI TITANIUM BATTERY-AT THE ANODE LITHIUM IS OXIDIZED. LITHIUM IONS ARE RELEASED FROM THE CARBON ALONG WITH ELECTRONS,
AT CATHODE-LITHIUM IONS ARE ABSORBED BY LITHIUM DI OXIDE AND THE ELECTORODE IS REDUCED AS IT RECIVES ELECTRONS.
