Covalent grafting of <i>p</i>-phenylenediamine molecules onto a “bubble-like” carbon surface for high performance asymmetric supercapacitors

Abstract

A simple but efficient template carbonization method was prepared to covalently graft <italic>p</italic>-phenylenediamine molecule onto hollow “bubble-like” carbon spheres (PPD–BC) surface as the negative electrode for high performance asymmetric supercapacitors.