Chitin and Chitosan—Foremost Hybrid Piezoelectric Materials for Energy Harvesting Applications

Chitosan is the second most abundant amino polysaccharide and is mostly used in biopolymers globally. People have broadly used it for ages because of its combined effect of eco-friendly and exceptional sustainability aspects such as renewability, economy, biocompatibility, and biodegradability. Chitin and chitosan, both materials and their novel applications, have been researched in recent times, with a current emphasis on energy harvesting. The inherent molecular polarity arising from the non-centrosymmetric crystalline structure of chitosan is accountable for the piezoelectric characteristics. The newest breakthroughs in the design, modification, processing, and integration of chitosan-based piezoelectric energy harvesters for energy storage applications are discussed in depth in this chapter.