Spin-engineering with electrocatalysts have been exploited to suppress the “shuttle effect” in Li–S batteries. Spin selection, spin-dependent electron mobility and spin potentials in activation barriers can be optimized as quantum spin exchange interactions leading to a significant reduction of the electronic repulsions in the orbitals of catalysts. Herein, we anchor the MgPc molecules on fluorinated carbon nanotubes (MgPc@FCNT), which exhibits the single active Mg sites with axial displacement. According to the density functional theory calculations, the electronic spin polarization in MgPc@FCNT not only increases the adsorption energy toward LiPSs intermediates but also facilitates the tunneling process of electron in Li–S batteries. As a result, the MgPc@FCNT provides an initial capacity of 6.1 mAh cm⁻² even when the high sulfur loading is 4.5 mg cm⁻², and still maintains 5.1 mAh cm⁻² after 100 cycles. This work provides a new perspective to extend the main group single-atom catalysts enabling high-performance Li–S batteries.

As a novel type of green energy storage device, supercapacitors exhibit several orders of magnitude higher capacities than the traditional dielectric capacitors and significantly higher power density than the traditional secondary batteries. Supercapacitors have been widely applied in energy storage fields. Electrode materials, as pivotal components of supercapacitors, play an important role in electrochemical performance. Molybdenum-based materials have attracted widespread attention for their high theoretical capacitance, abundant resources, and facile synthesis tactics. Therefore, it is necessary to systematically summarize the application of Mo-based electrode materials in high-performance supercapacitors and unveil their developmental direction and trends. In this paper, we provide a review of binary Mo-based materials, ternary Mo-based materials, nanocomposites of Mo-based materials, and Mo-based MOFs and derivative materials. In addition, we further point out the key issues on the development of Mo-based materials in supercapacitors. This review may inspire more insightful works and enlighten other electrochemical areas concerning Mo-based materials.

Rechargeable aqueous zinc‐ion batteries are promising candidate for grid‐scale energy storage. However, the development of zinc‐ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior lifespan. Herein, hexagonal Cs_0.3V₂O₅ cathode is fabricated and investigated in zinc‐ion batteries. Compared with the traditional vanadium oxides, the introduction of Cs changes the periodic atomic arrangements, which not only stabilizes the open framework structure but also facilitates the Zn²⁺ diffusion with a lower migration energy barrier. Consequently, high specific capacity of 543.8 mA h g⁻¹ at 0.1 A g⁻¹ is achieved, which surpasses most of reported cathode materials in zinc‐ion batteries. The excellent cycle life is achieved over 1000 cycles with about 87.8% capacity retention at 2 A g⁻¹. Furthermore, the morphological evolution and energy storage mechanisms are also revealed via a series of techniques. This work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase‐dependent cathodes in zinc‐ion batteries.