Vertically Oriented MoS₂ with Spatially Controlled Geometry on Nitrogenous Graphene Sheets for High‐Performance Sodium‐Ion Batteries

Abstract

Inspired by the great success of graphite in lithium‐ion batteries, anode materials that undergo an intercalation mechanism are considered to provide stable and reversible electrochemical sodium‐ion storage for sodium‐ion battery (SIB) applications. Though MoS2 is a promising 2D material for SIBs, it suffers from deformation of its layered structure during repeated intercalation of Na+, resulting in undesirable electrochemical behaviors. In this study, vertically oriented MoS2 on nitrogenous reduced graphene oxide sheets (VO‐MoS2/N‐RGO) is presented with designed spatial geometries, including sheet density and height, which can deliver a remarkably high reversible capacity of 255 mA h g−1 at a current density of 0.2 A g−1 and 245 mA h g−1 at a current density of 1 A g−1, with a total fluctuation of 5.35% over 1300 cycles. These results are superior to those obtained with well‐developed hard carbon structures. Furthermore, a SIB full cell composed of the optimized VO‐MoS2/N‐RGO anode and a Na2V3(PO4)3 cathode reaches a specific capacity of 262 mA h g−1 (based on the anode mass) during 50 cycles, with an operated voltage range of 2.4 V, demonstrating the potentially rewarding SIB performance, which is useful for further battery development.

A Ternary Fe1−xS@Porous Carbon Nanowires/Reduced Graphene Oxide Hybrid Film Electrode with Superior Volumetric and Gravimetric Capacities for Flexible Sodium Ion Batteries

“…Then aqueous dispersion of GO NSs is mixed well with the ethanol dispersion of Fe-CPNWs. 2019, 9,1803052 of the Fe 1−x S@PCNWs/rGO hybrid paper. The Fe-CPNWs/GO paper is achieved with the vacuum filtration-induced assembly process, and the sulfuration of Fe-CPNWs and elimination of the oxygen-containing functional groups on the GO at the same time render the formation Adv.…”

Few‐Layer MoS2 Nanosheets Encapsulated in N‐Doped Carbon Hollow Spheres as Long‐Life Anode Materials for Lithium‐Ion Batteries

“…[13][14][15][16][17] Unfortunately,c onsiderable capacity fading caused by its intrinsic low electronic conductivity,a ggregation,a nd pulverization on extended cyclingcannotbeavoided by mere nanostructure engineering. Thus,a nother strategy of integrating nanostructured MoS 2 with highly conductive materials, such as graphene, [18][19][20] amorphous carbon, [21,22] carbon nanotubes (CNT), [23,24] and conductingp olymers, [25][26][27][28] has been proposed to solve the abovementioned problems. Besides the advantages of nanostructured MoS 2 ,t he mechanicallys table and electronically conductive carbon component serving as ac onductive skeleton in the hybrid configuration can effectively enhancet he conductivity of the electrode, buffer the volume change,a nd thus resulti n improved cycling performance and rate capability.…”

Lamellar V5O12·6H2O Nanobelts Coupled with Inert Zn(OH)2·0.5H2O as Cathode for Aqueous Zn2+/Nonaqueous Na+ Storage Applications

“…However, some unavoidable shortcomings still impede the further large‐scale application of LIBs. Initially, the relatively low reserve of lithium source and massive application of LIBs aroused the long‐term crisis of lithium scarcity . Simultaneously, the anticipated environment benefit of LIBs is hard to achieve, because lots of carbon dioxide will be produced in the manufacturing process of LIBs .…”

“…Initially, the relatively low reserve of lithium source and massive application of LIBs aroused the long-term crisis of lithium scarcity. [3][4][5] Simultaneously, the anticipated environment benefit of LIBs is hard to achieve, because lots of carbon dioxide will be produced in the manufacturing process of LIBs. [6] In addition, exposed safety issues and the high price of toxic organic electrolytes of LIBs also remain to be solved.…”