fig20

Figure 20. (A) Rate performances of the Na//NVP cells using GM and Celgard 2400-LE and the cyclic performances of the cells at 1 C and 10 C^[217]; (B) The relationship between average voltage and capacity of different solid electrolytes for sodium-ion batteries (SPE: Polymer solid electrolyte, ISE: Inorganic solid electrolyte, CPE: Composite solid electrolyte)^[219]. Reproduced from Ref.^[217,219] with permission from Wiley. GM: Graphene matrix.