Lithium−sulfur batteries are appealing electrochemical energy storage systems due to their potentially high energy output and low cost. At present, practical realization of Li−S batteries is hindered by unfavorable polysulfide shuttle during discharge−charge cycles, which causes capacity decay and sluggish kinetics of an electrode reaction. Metal sulfide catalysts were proposed to stabilize Li−S electrochemistry due to their ability to anchor polysulfides and facilitate their electrochemical conversion. In this work, zinc sulfide nanoparticles were synthesized and supported on a thin carbon cloth through a one-pot hydrothermal reaction. The catalyst-supported carbon cloth, with a low mass content of sulfides (2.18 wt %), could serve as a functional interlayer, absorbing the dissolved polysulfides and catalyzing the conversion reaction. As a result, the Li−S battery showed improved cycling performance with a high capacity retention of 93.5% after 100 cycles. This work demonstrates a rational strategy to realize high-performance Li−S batteries.
The preparation of two-dimentional (2D) composite material consisting of active metal-based phase and carbon matrix is still a challenge. Herein, 2D bimetal Co-TCPP(Fe) metal-organic framework (MOF) is synthesized and then...
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