The destination of materials design and fabrication is to come up with the best large-scale performance with well-distributed configuration and composition of individual building blocks. Biomass is increasingly becoming the hot topic, as it is a promising scenario to develop materials with three-dimensional order and multiple properties. Nowadays, nature-derived nano-materials have been widely employed either directly or as a template for energy storage field, especially in the field of rechargeable battery systems.
In this work, the animal-derived nanocomposite has been studied for the supercapacitors and lithium-ion batteries. A polydimethylsiloxane (PDMS) substrate with open network of pores and high stretchability was fabricated by introducing the as-prepared SSs carbon into PDMS substrate via acid wash method. In addition, SWCNT was uniformly sprayed onto the porous substrate to form a 3D interconnected porous structure. The results indicated that the supercapacitors with the stretchable hybrid electrodes could deliver a high energy density of 44.1 Wh kg-1 under 20% applied tensile strain. A high capacitance retention of 90% could be achieved if the prepared supercapacitors were bended from 0o to 180o. Similarly, rate performance of the lithium-ion batteries decreased by no more than 2 mAh gâ1 in all situations at rate from 0.5C to 5C when stretching at 20% elongation.
