Book excerpt: Polymer Blend Nanocomposites for Energy Storage Applications presents the latest developments in polymer blend-based nanocomposites for applications in energy storage, covering theoretical concepts, preparation methods, characterization techniques, properties and performance. The book begins by introducing polymer blend-based nanocomposites, preparation methods, mechanisms, requirements, theory, modeling, and simulation, with subsequent sections covering the use of specific base materials, including elastomers, thermoplastics, thermoset polymers, and biodegradable polymers. Final sections covers polymer blend nanocomposites with different fillers, both for conducting polymers and non-conducting polymers. Devices discussed include capacitors, supercapacitors, batteries, fuel cells, and solar cells. Finally, other key aspects are considered, including the conversion from laboratory to industry and recycling and lifecycle assessment of polymer blend nanocomposites used in energy devices. - Focuses on nanocomposites based on polymer blends, both conducting and non-conducting - Guides the reader to applications in capacitors, supercapacitors, batteries, fuel cells, solar cells, and other areas - Considers modeling and simulation, translation from lab to industry, recycling, and lifecycle assessment