Using eggshell membrane as a separator in supercapacitor

Abstract A separator is prepared based on natural and flexible eggshell membrane (ESM) for supercapacitor application. Morphology observation shows that the ESM is consisted of hierarchically ordered macroporous network. With a high decomposition temperature (>220 °C), enough mechanical strength ( σ max  = 6.59 ± 0.48 MPa, ɛ max  = 6.98 ± 0.31%, respectively), and low water uptake and swelling property ( τ is 4.76 s), and good cyclic stability (92% retention after 10,000 cycles). However, the one with PE separator shows worse properties (high resistance, low specific capacitance, etc.). This research provides new insight into the preparation of natural, low-cost and high-performance separator for supercapacitor and other applications.