A scalable, ecofriendly, and cost-effective lithium metal protection layer from a Post-it note

A low-cost, ecofriendly, and scalable paper-derived protective layer is designed to achieve excellent electrochemical performance.

Multi-layer MoS2 : An Effective Barrier Enhancer and a Promising Nanofiller for Metal Protection

Two-dimensional nanomaterials are of great interest because of their unique properties and the great application potential in various fields. In this study, the performance of few-layer MoS2 nanosheets (MDNSs) as new nanofillers to enhance the barrier properties of poly(vinyl butyral) (PVB) is investigated. Gas permeability tests show that well-dispersed MDNSs can prevent at least 98% of oxygen molecules and 31% of water vapour from penetrating through the matrix of MDNS/PVB composites. Electrochemical analyses reveal that the corrosion rate of brass coated with the resulting composite coating is as low as 1.35×10− 8 mm/year, which is six orders of magnitude smaller than that of brass protected by a pristine PVB coating. These results indicate that MDNSs are highly effective barrier enhancers and suitable candidate materials for metal protection.

Advances of 2D MoS2 for High-Energy Lithium Metal Batteries

Often touted as the most promising next-generation energy storage systems, lithium (Li) metal batteries have drawn extensive interest due to their energy densities beyond those of Li-ion batteries. The use of Li metal, however, presents a major hurdle since it is susceptible to Li dendrite growths, corrosive interfacial reactions, and uncontrolled volume changes. Li-metal protection is an important issue in overcoming those challenges. In particular, studies have shown that molybdenum disulfide (MoS2) can significantly improve the performance and safety of Li metal batteries when used as a protective coating for anodes, separator modification, and stable interfacial layer between solid-electrolytes and Li metal. Herein, we review the successful implementation of MoS2 for improved Li metal batteries including those of the liquid-type and the solid-state cells. We also provide opportunities and prospects of MoS2 applications for safe and practical Li metal batteries.