Nature Communications

High mass loading and fast charge transport are two crucial but often mutually exclusive characteristics of pseudocapacitors. On conventional carbon supports, high mass loadings inevitably lead to sluggish electron conduction and ion diffusion due to thick pseudocapacitive layers and clogged pores. Here we present a design principle of carbon supports, utilizing self-assembly and microphase-separation of block copolymers. We synthesize porous carbon fibers (PCFs) with uniform mesopores of 11.7 nm, which are partially filled with MnO2 of
High mass loading and fast charge transport are two crucial but often mutually exclusive characteristics of pseudocapacitors. Here, the authors address this challenge by making use of block copolymer phase separation in the synthesis of porous carbon fibres as carbon supports for pseudocapacitors.