fig4

Figure 4. (A) Microscopic image of a 2D interdigital MB (reproduced with permission^[54]. Copyright 2007, Elsevier). (B) Photograph of a bendable 2D thin-film MB that could light a blue LED when bent. The inset image shows the layer components of the MB. (C) Nyquist plots of AC impedance test for the bendable 2D MB. (D) Capacity and Coulombic efficiency of the bendable MB over 100 cycles (reproduced with permission^[55]. Copyright 2012, ACS Publications). MB: Microbattery.