Synthesis of hollow S/FeS2@carbon nanotubes microspheres and their long-term cycling performances as cathode material for lithium-sulfur batteries

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

“…[125] Moreover, the large volumetric variation of the active material can be buffered by the spherical architecture of the CNTs/FeS 2 hybrid host, as shown in Figure 12i, in which the volume expansion is accommodated by the sufficient internal voids, thus extending the cycle life of the device. [126] In summary, architectural engineering (such as constructing (hierarchical) porous/well-ordered structures and modifying CNTs with specific atomic features), heteroatom doping and hybridization are prevalent strategies in improving the conductivity of the cathode, mitigating the volume variation, suppressing the shuttling effect, promoting the electrochemical kinetics and enhancing the sulfur loading/utilization.…”

Selecting non‐metal doped FeS2 as efficient sulfur cathode host for enhanced Li−S redox chemistry

“…By combining the physical interaction of CNTs with chemical adsorption, the dissolution of LiPS is reduced and the internal void space can reduce the volume expansion of the cathode. [19] The FeS 2 @C cathode can provide stable specific capacity. At the same time, it shows stable electrochemical performance in the LSBs.…”

Coordinating Interface Polymerization with Micelle Mediated Assembly Towards Two‐Dimensional Mesoporous Carbon/CoNi for Advanced Lithium–Sulfur Battery

“…[14] In principle, a desirable host materials should meet these requirements: 1) highly conductive framework to facilitate electron transportation; 2) porous structure with high surface area to accommodate sulfur with high capacity and simultaneously buffer volume expansion in the charge-discharge process; 3) short pore channel distance to promote the lithium ion migration and facilitate the subsequent reaction with S; 4) relative strong interface interaction between polysulfides and host materials to decrease the LiPSs dissolution; 5) abundant and highly active catalytic sites to accelerate the conversion kinetic of polysulfides and prevent the LiPSs shuttle effect. [15][16][17][18][19] Tremendous numbers of host materials have been developed, such as carbon materials, [20][21][22] metal-sulfur nanocomposites, [23,24] metal covalent organic frameworks, [25,26] metal sulfides, [27] phosphides [28] and oxides, [29] but it remains challenging to integrate all these aspects into one brilliant host.…”