Free-standing MoS_x-based dual functional polysulfide catalyzer and immobilizer for high performance Li–S batteries

Abstract

Inducing multiple functionality/synergistic effect through rational design and utilization of functional materails is essential for high-performance prototype batteries. Herein, the controllable synthesis and simultaneous utilization of free-standing MoS3@polypyrrole nanowires@carbon paper...

Synchronous stabilization of Li–S electrodes by a 1T MoS2@AAO functional interlayer

“…However, AAO seems to be function-limited to the anode side, and the simultaneous suppression of Li dendrite growth and polysulde shuttling via AAO membrane has been challenging due to the lack of an ultra-sulfurphilic surface. Modi-cation of functional interlayers with metal sulde materials, which provides a strong affinity to polysulde species and usually better conductivity when compared to metal oxides, 12,25,26 becomes a practical way to eliminate this limitation. Such interlayers can effectively trap LiPSs through a combination of physical barriers and chemical bonding.…”

“…[32][33][34] This inherent metallic conductivity, accompanied by other key parameters such as facilitated Li + transport, is essential in reducing the energy barrier, leading to controlled Li 2 S precipitation and accelerated surface mediated redox reaction. 25 Nevertheless, the integration of 1T metal sulde nanostructures into AAO straight channels requires delicate design and appropriate synthesis procedure. Maintaining the straight channel and tubular structure of 1T metal sulde materials becomes the priority as well as the nontrivial challenge.…”

Dynamic evolution of electrocatalytic materials for Li–S batteries

“…16,30 To further effectively immobilize LiPSs, polar metal compounds, such as metal oxides and metal sulfides, are involved in the carbon matrix, which is capable of chemically anchoring LiPSs. 45,46 Despite the alleviation of the shuttle effect of LiPSs, these strategies fail to ameliorate the redox kinetics of LiPSs by thoroughly bypassing the shuttle effect. 42,47,48 To this end, there has been unprecedented research activity on the development of electrocatalysts based on the adsorption-conversion mechanism, in favor of on-site adsorption and conversion of LiPSs in sequence.…”