No abstract

Sodium (Na)‐based batteries, as the ideal choice of large‐scale and low‐cost energy storage, have attracted much attention. Na metal anodes with high theoretical specific capacity and low potential are considered to be one of the most promising anodes for next‐generation Na‐based batteries. However, the high reactivity of Na metal anodes makes the electrode/electrolyte phase unstable, resulting in formation of Na dendrites, short cycle life and safety problems. Herein, the contribution outlines the latest development of Na metal anodes for Na metal batteries. The design strategies for high efficiency utilization of Na metal anodes are elucidated, including sophisticated electrode construction, liquid electrolyte optimization, electrode/electrolyte interface stabilization, and solid electrolyte adaptation. Finally, the future research direction and existing problems are proposed.

The shuttle effect of lithium polysulfides (LiPSs) and the slow kinetics of redox reactions seriously hinder the potential application of lithium-sulfur batteries (LSBs). Herein, multi-dimensional hybrid nanostructures (Co@N-CNTs/N-MoxC) consisting of...

The practical application of metalloid black phosphorus (BP) based anodes for potassium ion batteries is mainly impeded by its instability in air and irreversible/sluggish potassium storage behaviors. Herein, a 2D composite is purposefully conceptualized, where ultrathin BP nanodisks with Fe3O4 nanoclusters are hybridized with Lewis acid iron (V)‐oxo complex (FC) nanosheets (denoted as BP@Fe3O4‐NCs@FC). The introduced electron coordinate bridge between FC and BP, and hydrophobic surface of FC synergistically assure that BP@Fe3O4‐NCs@FC is ultrastable in humid air. With the purposeful structural and componential design, the resultant BP@Fe3O4‐NCs@FC anode is endowed with appealing electrochemical performance in terms of reversible capacity, rate behavior, and long‐duration cycling stability in both half and full cells. Furthermore, the underlying formation and potassium‐storage mechanisms of BP@Fe3O4‐NCs@FC are tentatively proposed. The in‐depth insights here will provide a crucial understanding in rational exploration of advanced anodes for next‐generation PIBs.