The large irreversible capacity of hard carbon limits its widespread commercialization for Li-ion batteries. To reduce the initial irreversible capacity of hard carbon, we investigated the effect of carbonization treatment of the precursor under vacuum on the irreversible capacity of resultant hard carbon. Compared with the sample carbonized under Ar atmosphere, the sample carbonized under vacuum obtained a lower irreversible capacity of 58 mA h g- 1, due to the formation of pyrolytic carbon film on the surface, and the reduction of BET surface area, amount of heteroatoms and hydroxyl groups.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering