The following graph represents the charge-discharge profile of a Li-ion battery in the 1st and 50th cycles, cycled at a rate of 0.1 C (1C = 274 mA h g-1 ) in the voltage range of 3.0 to 4.6 V. The battery is made up of LiCoO2 cathode and Li anode. Answer the following questions. a. What is the value of charge-discharge current density in this case? How long does it take for this battery to discharge from 4.6 V to 3.0 V in 50th cycle? b. Calculate Coulombic efficiency at 1st and 50th cycles. Why are these values different?
The following graph represents the charge-discharge profile of a Li-ion battery in the 1st and 50th cycles, cycled at a rate of 0.1 C (1C = 274 mA h g-1 ) in the voltage range of 3.0 to 4.6 V. The battery is made up of LiCoO2 cathode and Li anode. Answer the following questions.
a. What is the value of charge-discharge current density in this case? How long does it take for this battery to discharge from 4.6 V to 3.0 V in 50th cycle?
b. Calculate Coulombic efficiency at 1st and 50th cycles. Why are these values different?
c. How would this graph look like if LiCoO2 and Li were replaced by MnO2 and graphite electrodes respectively Make a rough sketch.
d. Mention any two practical disadvantages of this battery?
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