Electrospun High-Thermal-Resistant Inorganic Composite Nonwoven as Lithium-Ion Battery Separator

Figure 2

Photographs in (a)–(d) sequentially correspond to the SEM image of the PVDF-HFP surface of SPF after heat treatment at 150°C, 160°C, 170°C, and 180°C for 20 min. Photographs in (e)–(h) sequentially correspond to the SEM image of the SiO₂ surface of SPF after heat treatment at 150°C, 160°C, 170°C, and 180°C for 20 min. Photographs in (e)–(l) show the cross-section SEM of the composite separator after heat treatment at 150°C, 160°C, 170°C, and 180°C for 20 min.

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