Figure 4: Flexible testing of the Ge-QD@NG/NGF/PDMS. | Nature Communications

Figure 4: Flexible testing of the Ge-QD@NG/NGF/PDMS.

From: 3D nitrogen-doped graphene foam with encapsulated germanium/nitrogen-doped graphene yolk-shell nanoarchitecture for high-performance flexible Li-ion battery

Figure 4

(a) Typical stress–strain curves of free-standing 3D electrode structure with and without Ge-QD@NG. (b) Tensile strength and modulus of free-standing 3D electrode structure with and without Ge-QD@NG. Date are presented as mean±s.e.m., and error bars show s.e.m. (c) Galvanostatic charging/discharging curves of the battery. Red and blue lines represent the as-fabricated flat battery after 20 cycles and the bent battery after 20 cycles under repeatedly bending (bending angle of 90°), respectively. (d) Cyclic performance of the battery under flat and bent states. Red and grey lines represent the charging and discharging performance at charge–discharge rate of 1 C.

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