N, S-doped graphene derived from graphene oxide and thiourea-formaldehyde resin for high stability lithium–sulfur batteries

Abstract

Although lithium-sulfur (Li-S) batteries with high theoretical energy density and low cost have attracted extensive research, their commercialization is still unsuccessful due to the poor cycle life caused by the...

Heteroatom Codoped Graphene: The Importance of Nitrogen

“…Despite the fact that sulfur does not fit in the graphene plane and bulges out of the sheet, the most studied codoped graphene system is sulfur and nitrogen codoped graphene. There are so many articles published about this system − …”

“…The development of alkali metal ion batteries is another area that has been invaded by publications that use S and N codoped graphene. − In 2014, Ma et al produced S and N cocoped graphene using a chemical vapor deposition approach. The three-dimensional codoped graphene networks were utilized as anode materials for lithium ion batteries.…”

“…The capacity was 3525 mAh/g at a current density of 50 mA/g, and the rate capability was as high as 870 mAh/g at 1000 mA/g, with with excellent cycling stability. Following Ma et al’s landmark investigation, several works continued this line of research. − In some cases, metal nanoparticles, , nanocables, and nanospheres are also combined with S and N doped graphene to improve performance. Although the numbers obtained are impressive, and are in agreement with our theoretical predictions, to the best of my knowledge, there is not a commercial lithium ion battery based on S and N codoped graphene.…”

Percolation onset and conductivity of nanocomposites assuming an incomplete dispersion of graphene nanosheets in a polymer matrix

“…Graphene has attracted much interest in recent years because it exhibits outstanding levels of stiffness and conductivity. [1][2][3][4][5][6][7][8][9][10][11][12][13] The large diameter and small thickness of graphene introduce an early percolation onset in the samples, which can cause high conductivity due to the low filler content. 14,15 However, some obstacles, such as obtaining perfect graphene in high quantity and the identical dispersal of graphene in polymer mediums, limit the observation of its exceptional properties.…”

Decoration of defective graphene with MoS2enabling enhanced anchoring and catalytic conversion of polysulfides for lithium–sulfur batteries: a first-principles study

“…However, the nonpolar character of graphene leads to the weak binding affinity for LiPSs, which hinders its practical application in Li-S batteries. To improve the anchoring ability and the catalyst performance of graphene in Li-S batteries, various strategies have been proposed, such as doping heteroatoms, 9,10 introducing intrinsic defects, 11 and building graphene-based heterostructures. [12][13][14] Graphene doped with various heteroatoms (such as N, S, B, etc.)…”