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A new kind of pollution known as electromagnetic interference (EMI) caused by the ubiquitous usage of integrated electronic devices and communication systems is attracting increasing attention. The design and mass-production of functional materials for large-scale, flexible, and curved surface EMI shielding remains a challenge. In this study, we have developed a time-difference blow-spinning technology to continuously fabricate multilayer polyacrylonitrile (MLPAN) nanofibers; on combining with roll-to-roll dip-coating post-processing, a flexible Ti3C2Tx/MLPAN hybrid fabric was obtained. It shows a special dual-scale multilayer structure, including a primary multilayer structure from MLPAN, and a secondary nanoscale multilayer structure from Ti3C2Tx. The hybrid fabric is lightweight (639.0 mg cm−3), with high conductivity (23327.40 S m−1) and good mechanical stability. Moreover, this hybrid fabric exhibits a remarkable EMI shielding property with a shielding efficiency of 61.8 dB, which is attributed to the synergistic effect of surface reflection, internal multiple scattering and multiple reflections. [ABSTRACT FROM AUTHOR]

Lithium metal is the most promising anode material due to its high specific capacity (∼3860 mA h g−1) and low electrochemical potential (−3.04 V vs. standard hydrogen electrode). However, lithium dendrite growth, low coulombic efficiency (CE) and the infinite relative volume change during lithium plating/striping cycles have severely limited its practical applications. Using a composite lithium metal anode fabricated by melt infusion of lithium is employed as an effective method to solve the aforementioned issues, but the fabrication process is always complicated and it is difficult to realize large-scale production. Herein, we demonstrate a simple and scalable method to fabricate a composite Li structure. By heat treatment at 1200 °C, a common carbon matrix turns into a surface graphited carbon scaffold, which possesses good Li affinity and can be used to fabricate a three-dimensional (3D) composite Li anode by Li melt infusion. The one-step method makes it easy to realize scalable and cheap production of a lithium affinity scaffold. We achieved stable cycling of the lithium metal anode for 100 cycles at a high current density of 3 mA cm−2 in a carbonate electrolyte. The full-cell batteries with the 3D composite Li anode also delivered better rate and cycling performance than those with a bare Li anode. [ABSTRACT FROM AUTHOR]