Gel based sulfur cathodes with a high sulfur content and large mass loading for high-performance lithium–sulfur batteries

Abstract

A bacterial cellulose based carbon nanoribbon aerogel was employed for a gel-based sulfur cathode, simultaneously achieving both a high sulfur content (90%) and a high sulfur loading (6.4 mg cm−2) with a large capacity of 943 mA h g−1or 5.9 mA h cm−2.

Soybean-derived hierarchical porous carbon with large sulfur loading and sulfur content for high-performance lithium–sulfur batteries

“…Our recent rst principles-based calculations also suggest that O dopants, mainly through Li-O bonds, have signicantly larger binding energy than N dopants due to the more electronegative nature of O compared to that of N and C. Furthermore, O-and N-dopants can also work synergistically to enhance the bonding of polysuldes on the carbon surface. 46 Therefore, the small amount of oxygen, present in addition to nitrogen in the soybean-derived hierarchical porous carbon, will improve stabilization of lithium polysuldes that may otherwise diffuse into the electrolyte.…”

A review of flexible lithium–sulfur and analogous alkali metal–chalcogen rechargeable batteries

“…Fan and coworkers further reported a BC-derived and N,O-codoped carbon nanoribbon (CNR) aerogel as a binder-free conductive matrix by pyrolyzing BC aerogels in ammonia atmosphere. 178 The CNR/polysulfide catholyte gel electrode held great promise as it enabled both high sulfur content (90 wt%) and areal loading (6.4 mg sul cm À2 ) without compromising on capacity and cycling performance (905/815 mA h g sul/ele À1 , 96% of initial capacity retained after 100 cycles at 0.2C). More importantly, they systematically compared BC-derived CNRs with plant cellulose-derived carbon microfibers and indicated the superiority of using BC as the precursor for carbonized FPM, which was ascribed to the thinner diameter of BC nanofibrils (o100 nm, in sharp contrast to 10-20 mm of carbonized plant cellulose), higher specific surface area of CNRs, and larger doping contents.…”

Fabrication Methods of Porous Carbon Materials and Separator Membranes for Lithium–Sulfur Batteries: Development and Future Perspectives

“…The electrospinning method has attracted extensive attention due to its convenience and ideal dispersion of components . Ye et al synthesized sulfur–carbon‐nanocomposite‐filled polyacrylonitrile nanofibers (S/C/PAN) for Li–S batteries, using the electrospinning method.…”

“…Biomass‐derived carbon (also called biochar) is usually prepared by pyrolysis of biomass . In recent years, many N‐doped porous carbon materials have been synthesized by biomass.…”