Efficient polysulfide trapping in lithium–sulfur batteries using ultrathin and flexible BaTiO₃/graphene oxide/carbon nanotube layers

Abstract

Ultrathin and flexible layers containing BaTiO3 (BTO) nanoparticles, graphene oxide (GO) sheets, and carbon nanotube (CNT) films (BTO/GO@CNT) are used to trap solvated polysulfides and alleviate the shuttle effect in...

Recent advances in modified commercial separators for lithium–sulfur batteries

“…The highly conductive rGO enabled a high sulfur utilization as high as 80 wt%. Similar synergies have been reported between graphene derivatives and metal oxides like CeO 2 , 211 Fe 3 O 4 , 212 MoO 2 , 213 BaTiO 3 , 214 and defect-rich and amorphous Fe 3 O 4− x . 215 Studies involving transition metal nanoparticles like cobalt, 216 tungsten, 207 iron, 217 and nickel 218 on graphene have also reported similar benefits.…”

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

“…[ 120 ] Moreover, GO nanosheets can uniformly distribute other ingredients (such as metal oxides (BaTiO 3 nanoparticles)) hybridized with CNTs as the cathode host. [ 121 ] Notably, the microstructure of the hybridized cathode is dramatically influenced by the content of the additives in the system. For instance, the specific surface area can be modified from 81 to 126 m 2 g −1 by varying the amount of Ti 3 C 2 T x MXenes applied in preparing the porous CNT‐involved aerogel (Figure 12e), allowing the fabrication of LSBs of high areal capacity (6 mAh cm −2 ) at an improved sulfur loading of up to 10 mg cm −2 .…”

Promising nano-silicon anodes prepared using the “disperse-anchor” strategy and functional carbon nanotube interlayers for flexible lithium-ion batteries

“…2b, a CNT-lm can be extracted from the SACNT array, and the density of a monolayer lm is 1.5 mg cm −2 . 54,60 By layering each lm in a perpendicular direction to each other, a crossstacked lm is obtained. The CNTs of the functional interlayer are oriented and densely aligned (Fig.…”

“…55,56 These macroscopic carbon materials exhibit excellent electrical and mechanical properties 57 and have been successfully applied in exible composite electrodes, 42,58 current collectors, 41,59 and interlayers. 60,61 In this work, we propose a "disperse-anchor" strategy and a functional interlayer to solve the issues of the nano-Si anode. First, the "disperse-anchor" strategy is used to mitigate the aggregation problem and improve the homogeneity of the Si/C exible anodes by utilizing the electrostatic interaction.…”

“…55,56 These macroscopic carbon materials exhibit excellent electrical and mechanical properties 57 and have been successfully applied in flexible composite electrodes, 42,58 current collectors, 41,59 and interlayers. 60,61…”