Week 1 Understanding Different Battery Chemistry
Lithium Cobalt Oxide(LiCoO2) — LCO |
Lithium Manganese Oxide (LiMn2O4) — LMO |
Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2) — NMC |
Lithium Nickel Cobalt Aluminum Oxide (LiNiCoAlO2) — NCA |
Lithium Iron Phosphate(LiFePO4) — LFP |
Lithium Titanate (Li2TiO3) — LTO |
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| LiCoO2 cathode (~60% Co), graphite anode | LiMn2O4 cathode. graphite anode | LiNiMnCoO2. cathode, graphite anod | LiNiCoAlO2 cathode (~9% Co), graphite anode | LiFePO4 cathode, graphite anode | Cathode can be lithium manganese oxide or NMC; Li2TiO3 (titanate) anode | ||
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DURING DISCHARGE At the anode, lithium is oxidised. Lithium ions are released from the carbon, along with electrons: LiC6→xLi++xe−+C6LiC6→xLi++xe−+C6 At the cathode, lithium-ions are absorbed by the lithium dioxide, and the electrode is reduced as it also receives the electrons from the circuit: Li1−xCoO2+xLi++xe−→LiCoO2Li1−xCoO2+xLi++xe−→LiCoO2 The overall reaction is: C6+LiCoO2⟷LixC6+Li1−xCoO2 |
DURING DISCHARGE At the anode, lithium is oxidised. Lithium ions are released from the carbon, along with electrons: LiC6→xLi++xe−+C6LiC6→xLi++xe−+C6 At the cathode, lithium-ions are absorbed by the Manganese dioxide, and the electrode is reduced as it also receives the electrons from the circuit: Li1−xMnO2+xLi++xe−→LiMnO2Li1−xCoO2+xLi++xe−→LiCoO2 The overall reaction is: C6+LiMnO2⟷LixC6+Li1−xMnO2 |
DURING DISCHARGEAt the anode, lithium is oxidised. Lithium ions are released from the carbon, along with electrons: LiC6→Li++e−+C6LiC6→Li++e−+C6
At the cathode, lithium ions are absorbed by the lithium dioxide, and the electrode is reduced as it also receives the electrons from the circuit: LiFe(III)PO4+xLi++xe−→LiFe(II)PO4LiFe(III)PO4+xLi++xe−→LiFe(II)PO4
FePO4+Li++e−→LiFePO4FePO4+Li++e−→LiFePO4
The overall reaction is: LiFePO4+6C→LiC6+FePO4LiFePO4+6C→LiC6+FePO4
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