Necklace-like MoC sulfiphilic sites embedded in interconnected carbon networks for Li–S batteries with high sulfur loading

Abstract

The small MoC nanoparticles grown on the surface of interconnected carbon networks work as effective sulfiphilic sites, helping to achieve a high electrochemical performance for Li–S batteries.

An Overview of Bacterial Cellulose in Flexible Electrochemical Energy Storage

“…Given that several researchers have investigated the usage of BC in the interlayer of LSBs, investigations have also consistently demonstrated that BC‐based composites serving as the sulfur hosts can effect high performance. Shi et al . prepared a necklace‐like N‐CBC/MoC film by the freeze‐drying and solid‐state thermal reaction.…”

“…f) Cycling stability (150 cycles) and coulombic efficiency of the N‐CBC/MoC/Li 2 S 6 electrode with a sulfur loading of 4 mg cm −2 at a current density of 1.0 C. Reproduced from ref. with permission; copyright 2019, Royal Society of Chemistry.…”

“…[146] Given that several researchers have investigated the usage of BC in the interlayero fL SBs, investigations have also consistently demonstrated that BC-based composites serving as the sulfur hosts can effect high performance. Shi et al [139] prepared an ecklace-like N-CBC/MoC film by the freeze-drying and solid-state thermal reaction. The 3D interconnected nanofibrous network and abundant surface chemistry of BC are conducive to the uniform impregnation of molybdate ions in the robust framework andc an effectively avoid aggregation of the MoC particles during subsequent freezedrying and pyrolysis treatments (Figure 18 a, b).…”

Host Materials Anchoring Polysulfides in Li–S Batteries Reviewed

“…Other carbides, such as B 4 C, [296,297] Mo 2 C, [298][299][300] MoC, [301,302] NbC, [84,303] and WC, [304] have also been investigated as sulfur host. For example, Luo et al designed a simple catalyst-assisted approach to grow B 4 C nanowires at CNFs.…”

Natural Cellulose Substance Based Energy Materials

“…Similar with the plant based cellulose substances, the bacterial cellulose substance owns unique three‐dimensional network structures that composed of nanofibers within diameter below 100 nm, which ensures good electrochemical performances when it is employed as the carbon resource of the electrode materials for Li−S batteries [49] . For example, a necklace‐like molybdenum carbide/N‐doped carbon nanofiber (MoC@N‐CNF) composite was fabricated through the ion impregnation, freeze‐drying and solid‐state thermal reaction processes by employing the bacterial cellulose as both interconnected carbon networks and supporting framework for impregnated molybdate ions [50] . The ultrafine MoC nanoparticles with a size of ca .…”