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Principle of battery chemical reaction
- Jan 17, 2019 -

Lithium metal battery

A lithium metal battery is a type of battery using a lithium metal or a lithium alloy as a negative electrode material and using a nonaqueous electrolyte solution. The earliest lithium battery used the following reaction: Li + MnO2 = LiMnO2, the reaction is a redox reaction, discharge.

Lithium Ion Battery

positive electrode

Cathode material: There are many optional cathode materials, and most of the current mainstream products use lithium iron phosphate. Different cathode material comparisons:

LiCoO23.7 V140 mAh/g
Li2Mn2O44.0 V100 mAh/g
LiFePO43.3 V100 mAh/g
Li2FePO4F3.6 V115 mAh/g

Lithium iron phosphate

Positive electrode reaction: Lithium ions are embedded during discharge, and lithium ions are deintercalated during charging. When charging: LiFePO4 → Li1-xFePO4 + xLi+ + xe-discharge: Li1-xFePO4 + xLi+ + xe- → LiFePO4

negative electrode

Anode material: Graphite is mostly used. New research has found that titanate may be a better material. Negative electrode reaction: Lithium ion is deintercalated during discharge, and lithium ions are inserted during charging. When charging: xLi+ + xe- + 6C → LixC6 when discharging: LixC6 → xLi+ + xe- + 6C

Lithium cobaltate

The reaction that occurs on the positive electrode is

LiCoO2=Charge=Li1-xCoO2+XLi+ + Xe-

Li1-xCoO2+XLi+ + Xe-=discharge=LiCoO2

The reaction occurring on the negative electrode is

6C+XLi+ + Xe-= Charging = LixC6

LixC6=discharge=6C+XLi+ + Xe-