Carbon materials with a novel structure have been considered to be potential anodes for sodium ion batteries (SIBs).

Lithium metal has long been considered as the most promising anode due to its lowest reduction potential and ultrahigh energy density (3860 mA h g −1 ). However, the practical application of the lithium metal anode has been hindered by the limited volume evolution and undesirable dendritic structure. To address these thorny issues, we introduce 18-crown-6 as an additive to enhance the Coulombic efficiency and cycling stability of the Li metal anode. An optimal amount (1 wt %) of 18-crown-6 can not only promote the decomposition of lithium salts in the electrolyte to form a solid electrolyte interface (SEI) layer but also improve the electrolyte conductivity. The SEI layer with high ionic conductivity and strong mechanical properties can promote lithium ion diffusion and inhibit the growth of lithium dendrite and thus promote cycling stability, Coulombic efficiency, and rate performance of the cell. This work highlights the importance of 18-crown-6 in the electrolyte and reveals a new avenue to suppress the Li dendrites for lithium-based energy storage devices.

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Printed electronics, which fabricate electrical components and circuits on various substrates by leveraging functional inks and advanced printing technologies, have recently attracted tremendous attention due to their capability of large‐scale, high‐speed, and cost‐effective manufacturing and also their great potential in flexible and wearable devices. To further achieve multifunctional, practical, and commercial applications, various printing technologies toward smarter pattern‐design, higher resolution, greater production flexibility, and novel ink formulations toward multi‐functionalities and high quality have been insensitively investigated. 2D materials, possessing atomically thin thickness, unique properties and excellent solution‐processable ability, hold great potential for high‐quality inks. Besides, the great variety of 2D materials ranging from metals, semiconductors to insulators offers great freedom to formulate versatile inks to construct various printed electronics. Here, a detailed review of the progress on 2D material inks formulation and its printed applications has been provided, specifically with an emphasis on emerging printed memristors. Finally, the challenges facing the field and prospects of 2D material inks and printed electronics are discussed.