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Two-dimensional Co(OH)2/graphene oxide composite as efficient multifunctional interlayer for high-performance lithium-sulfur batteries.

08:00 EDT 10th March 2020 | BioPortfolio

Summary of "Two-dimensional Co(OH)2/graphene oxide composite as efficient multifunctional interlayer for high-performance lithium-sulfur batteries."

The shuttling-effect of soluble lithium-based polysulfides (LiPS) represents one of the main obstacles for the practical application of lithium-sulfur (Li-S) battery. Herein, to address this issue, a flexible Li-S interlayer consisting of two-dimensional α-Co(OH)2 nano-plate and graphene oxide (GO) is developed using a simple vacuum filtration technique. In the interlayer, the α-Co(OH)2 and GO are assembled into a layered structure forming a physical barrier for the shuttling of LiPS. Additionally, the α-Co(OH)2 offers strong chemical adsorption and efficient catalysis performance towards LiPS conversion, further inhibiting its shuttling. Attributed to these beneficial features of the interlayer, the Li-S battery delivers an initial discharge capacity of 834 mAh g-1 at the current density of 1 C. More importantly, after 300 cycles, a high discharge capacity of 590 mAh g-1 was retained, corresponding to a low capacity fading rate of 0.1 % per cycle. This work might be of great interest for the feasible and scalable preparation of multifunctional interlayer in Li-S battery.

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This article was published in the following journal.

Name: Nanotechnology
ISSN: 1361-6528
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