PC/EC+2E → acryline/ethylene+Co₃²¯

　　Co﹢+ Li l → li co₃ single electronic reaction to form alkyl carbonate:

　　PC/EC + E → PC﹣/EC﹣ Freedom Base

　　2PC/EC free radical + 2LI ﹢ → acryline/ethylene + alky oxygen carbonate

　　Lithium oxyxyxyl carbonate+H₂o → li₂co₃+Co₂+(ch₂oh) ₂ ₂

　　There are two assumptions about the guidance of the SEI membrane Li+:

　　1. LIT in the liquid phase reaches the SEI membrane interface, and the cation exchange transmission occurs with the help of the SEI membrane lithium salt component;

　　2. Migrate directly through the SEI membrane micropholic to the electrode body after the li+dehumidification in the liquid phase

　　The formation of SEI membrane is the result of the interaction between carbon negative and electrolyte. Its stability depends on the nature of the electrode and electrolyte

　　1. The effect of electrode interface nature on the stability of the SEI membrane

　　2. The effect of electrolyte composition on SEI membrane stability

　　3. Effect of impurities in electrolytes

　　4. The effect of temperature

　　5. Effect of current density

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