InSitu Templating Approach To Fabricate Small-Mesopore-DominantS‑Doped Porous Carbon Electrodes for Supercapacitors and Li-IonBatteries

To enable large capacity and high rate capability of porous carbon electrodes for lithium-ion batteries (LIBs) and supercapacitors, the combination of doping active heteroatoms, tailoring pore architectures, and narrowing pore sizes is a powerful engineered strategy. However, such porous carbons with multiple synergistic effects are almost impossible to be achieved simultaneously by conventional synthesis methods in a few steps. Herein, two mechanistically coupled polymers of poly(2-thiophenemethanol) (PThM) and SiO2 in one step process were synchronically produced by twin-polymerization of a single-source hybrid monomer of tetrathenyloxysilane consisting of tetraethyl orthosilicate (TEOS) and ThM moieties. The resultant interpenetrated SiO2/PThM composites were then subjected to thermal annealing and subsequent etching, yielding a mesopore-dominant S-doped porous carbon (SPC-1) with large-micropores (1.3–2.0 nm), narrow pore distribution (1.3–4.1 nm, centered at 3.1 nm), rich S heteroatoms (>5%), and hig...