Login / Signup

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

Ainhoa Álvarez-GómezJiayin YuanJuan Pedro Fernández BlázquezVerónica San-MiguelMaría B Serrano
Published in: Polymers (2022)
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- b -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 ( f PS ≈ 0.16). Both materials have been compared structurally (in addition to comparing their electrochemical behavior). The porous carbon fibers showed superior pore formation capability and exhibited a hierarchical porous structure, with small and large mesopores and a relatively high surface area (~492 m 2 /g) with a considerable quantity of O/N surface content, which translates into outstanding electrochemical performance with excellent cycle stability (close to 100% capacitance retention after 10,000 cycles) and high capacitance value (254 F/g measured at 1 A/g).
Keyphrases
  • metal organic framework
  • tissue engineering
  • gold nanoparticles
  • molecularly imprinted
  • highly efficient
  • ionic liquid
  • drug release
  • reduced graphene oxide
  • label free
  • drug delivery
  • solid state
  • carbon nanotubes