Polyacrylonitrile--Polystyrene Block Copolymer-Derived Hierarchical Porous Carbon Materials for Supercapacitor.

The use of block copolymers as a sacrificial template has been demonstrated to be a powerful method for obtaining porous carbons as electrode materials in energy storage devices. In this work, a block copolymer of polystyrene and polyacrylonitrile (PS--PAN) has been used as a precursor to produce fibers by electrospinning and powdered carbons, showing high carbon yield (~50%) due to a low sacrificial block content ( ≈ 0.16).