*3.2.1 The micromorphology of SLMP and AC*

**Figure 2(a)** showed the micromorphology of SLMP. The diameters of the SLMP range from 30 μm, and outside coated with a thin layer of Li2CO3 protective coating, which can exist in a relatively low air humidity environment. **Figure 2(b)** showed the micromorphology of AC; it was observed that AC particles show irregular morphology and the average size of the particles is about 4 μm.
