Mesoporous Carbon@Titanium Nitride Hollow Spheres as an Efficient SeS₂ Host for Advanced Li–SeS₂ Batteries

Abstract

The introduction of acertain proportion of selenium into sulfur-based cathodes is an effective strategy for enhancing the integrated battery performance.However,similar to sulfur, selenium sulfide cathodes suffer from poor cycling stability owingt ot he dissolution of reaction intermediate products.I n this study,toexploit the advantages of SeS 2 to the full and avoid its shortcomings,w ed esigned and synthesized ah ollow mesoporous carbon@titanium nitride (HMC@TiN) host for loading 70 wt %o fS eS 2 as ac athode material for Li-SeS 2 batteries.B enefiting from both physical and chemical entrapment by hollowmesoporous carbon and TiN, the HMC@TiN/ SeS 2 cathode manifests high utilization of the active material and excellent cycling stability.Moreover,ite xhibits promising areal capacity (up to 4mAh cm À2 )with stable cell performance in the high-mass-loading electrode.

Confining Sn nanoparticles in interconnected N-doped hollow carbon spheres as hierarchical zincophilic fibers for dendrite-free Zn metal anodes

“…The synthetic route followed the previously reported work with slight modifications ( 43 ). SnO 2 hollow spheres (0.25 g) were dispersed in 35 ml of DI water.…”

Double‐shell and yolk‐shell structured ZnSe ‐carbon nanospheres as anode materials for high‐performance potassium‐ion batteries

“…The modified Stöber method was utilized for producing porous and hollow carbon (HC) nanospheres. 23 The uniform-size hollow carbon nanospheres with abundant pore volumes, from micro-to mesopores, were used as a substrate for the infiltration of a precursor solution containing zinc nitrate and selenium dioxide. A repeated drop-and-dry method facilitated the precursor solution to penetrate deep inside the carbon shell through the micro-and mesopores by capillary action.…”

“…Hollow carbon nanospheres, serving as a substrate, were prepared using a reported method. 23 To obtain ZnSeencapsulated hollow carbon nanospheres, 0.06 g of zinc nitrate and 0.067 g of SeO 2 were dissolved in a highpurity solution of ethyl alcohol. The fully dissolved solution was impregnated in 0.02 g of porous hollow carbon nanospheres by a drop-and-dry process.…”

Investigation of the potassium‐ion storage mechanism of nickel selenide materials and rational design of nickel selenide‐C yolk‐shell structure for enhancing electrochemical properties

“…First, porous and hollow carbon nanospheres were prepared for the use as substrates, and their synthesis procedure was introduced in a previous report. 23 Next, to prepare the precursor solution for infiltration, Ni(NO 3 ) 2 Á6H 2 O (97.0% JUNSEI) and SeO 2 (99.5%, Samchun), at a mole ratio of 1:2, were mixed with high-purity ethyl alcohol until the solution dissolved. The metal salt solution was gradually soaked and infiltrated in 0.02 g of hollow carbon because of the capillary action by the drop and drying process.…”