S‐Doped Porous Carbon Cage with Good Accommodation Ability as an Effective S Host for Li‐S Batteries

Abstract

The practical application of Li−S batteries is still limited by the fundamental problems of the insulation properties of sublimed S and the “shuttle effect” of polysulfides. S‐doped porous carbon cage (SPCC) obtained by the catalytic guidance methodology is employed as a highly efficient S host material for Li−S batteries, which presents the cage‐like morphology coupled with abundant pore channels. Compared to the undoped PCC, SPCC exhibits higher electrical conductivity. The composite of sublimed S and SPCC (S@SPCC) employed as cathode for Li−S batteries possesses a higher reversible capacity, superior rate capability and better durability in comparison with that of S@PCC cathode. The synergistic effect of robust matrix associated with good electrical conductivity and abundant pore channels of SPCC is beneficial for the fast electron transport and shorten the Li‐ion diffusion distance. Besides, S doping possesses the positive function to attract Li‐polysulfides, inhibiting the shuttle of Li‐polysulfides and contributing to the superior electrode behavior of the S@SPCC cathode.

Tungsten Carbide‐Based Materials for Electrocatalytic Water Splitting: A Review

“…However, in most cases, the electronic properties of the supported Pt atoms are highly dependent on coordination/supporting environments, which have been shown to be crucial for enabling the Pt catalysts with high intrinsic activity [137] . Recently, in July 2023, Zhang et al [138] prepared series of Pt/WC catalysts with WC as support. The result showed the best sample Pt/WC‐3 in 0.5 M H 2 SO 4 with a Pt content of 8.3 wt % has a low overpotential (η 10 =28 mV), as shown in Figure 12b, which is much less than the 34 mV of 20 % commercial Pt/C and had a Tafel slope of only 18.9 mV dec −1 (as shown in Figure 12c).…”

“…Copyright (2022), Wiley‐VCH (b) Overpotential of Pt/WC‐3, Pt/WC‐4, Pt/ C‐2, and 20 wt % Pt/C (c) Tafel slope of Pt/WC‐3, Pt/WC‐4, Pt/ C‐2, and 20 wt % Pt/C (d) Chronopotentiometry curve of Pt/WC‐3 and 20 wt % Pt/C. Permission granted for reproduction [138] . Copyright (2023), Wiley‐VCH.…”

Challenges and opportunities for engineering thermochemistry in carbon-neutralization technologies

“…With >80% of the world's energy and materials (e.g. steel, cement, plastics) from fossil and carbonaceous resources, achieving this goal in a short time needs scientifically sound, economically sustainable and practically effective and deployable approaches, even though many strategies have been proposed by researchers and policymakers [ 1 , 2 ]. Statistical analysis indicates that excessive carbon emissions are from several super-emitters, including boilers and motors burning fossil fuels (i.e.…”