Sodium‐ion batteries (SIBs) have become an auspicious candidate for large‐scale energy storage by cause of low cost, natural abundance, and similar working principle with lithium‐ion batteries (LIBs). At present, there is an urgent need to explore superior anode materials with rapid and stable sodiation/desodiation. Herein, 3D self‐assembled VS4 curly nanosheets hierarchitectures (VS4‐CN‐Hs) are developed for SIB anodes, where VS4 possesses a large theoretical sodium storage capacity, and the building block of nanosheets has large exposed surface area to the electrolyte as well as the constructed hierarchitectures can provide abundant buffer space to alleviate the volume expansion. As a result, VS4‐CN‐Hs anode possesses excellent electrochemical performance under a wide voltage window of 0.01–3.0 V, such as high reversible capacity of 863 mA h g−1 at 0.1 A g−1, marvelous rate feature (444 mA h g−1 at 10 A g−1), and extralong cycle stability (386 mA h g−1 after 1000 times at 5 A g−1).

A functional Na3V2(PO4)2O2F (NVPOF) cathode with multi-component (Na3V(PO4)2, V2O3, and reduced graphene oxide) surface coating (denoted as MC-NVPOF) is developed via facile hydrothermal reaction followed by calcining, which exhibits high...

Potassium-ion batteries (PIBs) have received widespread interest on account of low redox potential, low price, and high abundance of potassium. However, attributing to the large radius of K+ ions, the structure of electrode material is easily damaged during the potassiation/depotassiation process. Herein, the unique chemical bonding of encapsulating V5.45S8 nanoparticles in N,S codoped multichannel carbon nanofibers (CB-VS@NSCNFs) is designed through electrospinning and in situ vulcanization techniques. The anchoring effect (V–C chemical bonding) of the V5.45S8 nanoparticles with carbon carriers assists in shortening the K+/e– transport path and alleviating the structural changes, which is highlighted to acquire a stable cycle lifespan. Also, codoped multichannel carbon nanofibers provide abundant active sites for pseudocapacitive behavior to achieve fast kinetics. As a synergistic result, when CB-VS@NSCNFs are evaluated as anode material for PIBs, they exhibit a high reversible capacity of 411 mA h g–1 at 0.1 A g–1, decent rate property with a capacity of up to 123 mA h g–1 at 6 A g–1, and good cycling stability of 500 cycles at 1 A g–1.