Titanium disulfide (TiS₂) is investigated as an advanced conversion electrode for sodium (Na)‐ion batteries (NIB) in an ether‐based electrolyte (NaPF₆/glyme (DME)). The as‐prepared TiS₂ demonstrates a high reversible capacity of 1040 mA h g⁻¹ at 0.2 A g⁻¹ with the capacity contribution of 521 mA h g⁻¹ in the voltage region below 1.0 V (vs Na/Na⁺), remarkable initial coulombic efficiency of 95.9% and superior rate capability of 621 mA h g⁻¹ at 40 A g⁻¹. The high conductivity of the Ti‐based compounds and nanosized particles generated by chemical conversion reactions could minimize the entropic barrier for the reversible conversion, resulting in high reversibility and ultrafast charge/discharge ability of the electrode. Moreover, with its strong ability to adsorb soluble polysulfide intermediates, the as‐prepared TiS₂ electrode exhibits superior cycling stability over 9000 cycles, serving as a stable and ultra‐high capacity conversion electrode for NIBs.

Benefiting from the unique structure of ultrafine NiS_x nanospheres uniformly wrapped in the in situ S-doped rGO matrix, the NiS_x–rGOS electrode delivers a high reversible capacity of 516 mA h g⁻¹ at 0.2 A g⁻¹ and a remarkable rate performance of 414 mA h g⁻¹ at 4 A g⁻¹, offering a low cost and high performance anode material for Na-ion batteries.

Lithium metal anodes have long been considered as “holy grail” in the field of energy storage batteries, but dendrite growth and large volume changes hinder their practical applications. Herein, a facile and eco‐friendly CF₄ plasma treatment is employed for the surface modification of Li anodes, and an artificial layer consisting of LiF and Li₂C₂ is fabricated for the first time. Experimental results and theoretical calculations reveal that the high adsorption energy of LiF and low Li⁺ diffusion barriers in Li₂C₂ induce uniform nucleation and planar growth of Li, guaranteeing a stable and dendrite‐free Li structure during the repeated plating/stripping process of cycling. Symmetric cells using CF₄ plasma‐treated Li operate stably for more than 6500 h (at 2 mA cm⁻² and 1 mAh cm⁻²) or 950 h (at 1 mA cm⁻² and 10 mAh cm⁻²). When paired with a LiFePO₄ cathode, full batteries deliver a high reversible capacity of 136 mAh g⁻¹ (at 1 C) with considerable cycling stability (97.2% capacity retention over 200 cycles) and rate performance (116 mAh g⁻¹ up to 5 C). This powerful application of plasma technology toward novel LiF‐Li₂C₂ artificial layers provide new routes for constructing environment‐friendly and high‐performance energy storage devices.