Synthesis of CeO2@S Composite as Cathode Material for in Lithium-Sulfur Batteries

Abstract

Rare metal oxides have many appealing characteristics and performance in many aspects, such as photo catalysis and energy storage. In recent decades, traditional metal oxides have been identified as promising cathode host materials for Li-S batteries. The metal oxides could provide chemical adsorption for the soluble polysulfide in the electrolyte. However, there are few works about the employment of rare metal oxides in the lithium-sulfurcould batteries. In our work, metal oxide CeO2 frameworks are prepared and designed as perfect host materials for the sublimed sulfur. Its unique 3D interconnected frameworks could provide sufficient space for the storage of polysulfide. In addition, the 3D structure is beneficial for the rapid electrons transport.

Recent advances and perspectives in conductive-polymer-based composites as cathode materials for high-performance lithium–sulfur batteries

“…[54][55][56] Among them, sulfur cathode modication has received substantial attention because it increases the conductivity of the sulfur cathode, connes LiPSs in the cathode, and alleviates the volume expansion of the sulfur cathode during cycling. [57][58][59] Thus far, a variety of materials have been used to modify sulfur cathodes, including carbon-based materials, [60][61][62] metal oxides/ suldes, [63][64][65][66] and conductive polymers (CPs). 34,[67][68][69] Considering the high energy consumption during the preparation of carbonbased materials and metal-based materials, the introduction of conductive polymers into sulfur cathodes is considered to be one of the most low-energy methods to improve the electrochemical performance of Li-S batteries.…”