2.3. Coin cell assembly process
In the CM method, the anodes were brought face to face with Li foil for
a period, then taken out and assembled in the full-cell configuration
with the NMC622 cathodes. On the other hand, in EM treatment, the anodes
were pre-lithiated by half-cell with lithium metal as counter electrode
using the electrolyte of 1.2 M LiPF6 dissolved in EC:
EMC (3:7, v/v) and a polypropylene separator (PP, Sigma-Aldrich) to
achieve the pre-lithiation process. Then, these anodes were disassembled
from half-cell and used again for matching in full-cell. All the steps
were carried out in an Ar-controlled glovebox (MBRAUN, Germany). After
the pre-lithiation process, these anodes were assembled in full-cell
with NMC622 cathode material.