Sulfur encapsulated in a wafer-like carbon substrate with interconnected meso/micropores for high-performance lithium–sulfur batteries

Abstract

A wafer-like graphene-based porous carbon substrate was synthesized for high-performance lithium–sulfur batteries.

Cold‐Resistant Nitrogen/Sulfur Dual‐Doped Graphene Fiber Supercapacitors with Solar–Thermal Energy Conversion Effect

“…To date, various graphene electrode materials, including graphene hybrids with carbon nanotubes (CNTs), active carbon, transition metal oxides, and conductive polymers have been prepared with complicated fabrication techniques for improving energy storage performances [12–14, 19–22] . Heteroatom doping (B, N, O, P, and S) is a facile and promising strategy to ameliorate the poor capacitive performances by modulating surface charge distributions [23–28] . To further improve the electrochemical activity, heteroatom dual‐doped graphene materials are fabricated and firstly used as oxygen reduction catalysts [29–31] .…”

“…[12][13][14][19][20][21][22] Heteroatom doping (B, N, O, P, and S) is af acile and promising strategy to ameliorate the poor capacitive performances by modulating surface charge distributions. [23][24][25][26][27][28] To furtheri mprovet he electrochemical activity,h eteroatom dual-doped graphene materials are fabricated andf irstly used as oxygenr eduction catalysts. [29][30][31] For graphene-based electrodem aterials in the formso fhydrogels, aerogels, textiles, films, and fibers, heteroatom dualdopingi sa ne ffectives trategyf or improving the energy storage ability with improvede lectrochemical properties on the basis of the synergistic effecto fh eteroatoms.…”

Porous Hollow Carbon Aerogel-Assembled Core@Polypyrrole Nanoparticle Shell as an Efficient Sulfur Host through a Tunable Molecular Self-Assembly Method for Rechargeable Lithium/Sulfur Batteries

“…Future energy storage devices with superior power density, high specific capacity, and low cost have stimulated enormous interest to mollify the booming demand for electric vehicles and electronic products. Sustainable lithium–sulfur (Li–S) batteries are one of the most promising next-generation rechargeable batteries due their relatively high theoretical specific capacity (1675 mAh g –1 ) and ultrahigh energy density (2600 Wh kg –1 ) which is several times larger than those of state-of-art lithium-ion batteries in the range of 300 Wh kg –1 . − However, the practical application of Li–S batteries is restricted by numerous issues, but the following are more common: (1) the poor conductivity of sulfur and final discharge products Li 2 S 2 and Li 2 S hinders the battery capacity; (2) the density difference between sulfur and Li x S ( x = 1–2) results in the volume expansion of the sulfur cathode during cycling process; and (3) the high dissolution of the sulfur in the electrolyte and final shuttling effect of discharge intermediates or LiPSs (lithium polysulfides) seriously affect the cycling stability of Li–S batteries. − …”