Huixin Jin

There are few reports on materials that can serve as electrodes for both supercapacitors and aqueous zinc‐ion batteries. Bimetallic phosphides exhibit high conductivity and excellent structural plasticity. Hence, a self‐supporting film electrode of ball‐shaped Mn‐doped NiCoP grown on 3D walnut shell‐derived carbon (WSC‐N/O@Mn‐NiCoP) was prepared in this work. The results indicate that the WSC‐N/O@Mn‐NiCoP delivers a high specific capacitance of 1972 F g ⁻¹ at 1.0 A g ⁻¹ . Furthermore, WSC‐N/O@Mn‐NiCoP can be used as an electrode for both supercapacitors and aqueous zinc‐ion batteries. The assembled WSC‐N/O@Mn‐NiCoP//WSC‐N/O (ASC) device delivers an energy density of 69.1 Wh kg ⁻¹ at 375 W kg ⁻¹ , with 85.8% capacitance retention after 8500 cycles. The energy density of Zn//WSC‐N/O@Mn‐NiCoP (AZIBs) achieves an energy density of 148.9 Wh kg ⁻¹ at 750 W kg ⁻¹ , with 80.6% capacitance retention after 1000 cycles. This excellent performance stems from the fact that biomass carbon provides abundant attachment sites to buffer volume variations and preserve structural integrity, while manganese doping activates multimetal redox reactions, delivering high capacity and ultra‐long cycle life. In short, this work provides a viable strategy for preparing high‐performance electrode materials.

The non-renewable nature of traditional fossil fuels, along with the environmental and health hazards posed by their emissions, underscores the urgent need to reduce transmission losses in power grids. This study employs single-variable experiments, first-principles calculations, and thermodynamic calculations. The results show that, although the mass fraction and increment of Si are greater than those of Mn and V, the increase in electrical resistivity of 8030 aluminum rods caused by Si is only slightly higher than that caused by Mn and V. In contrast, trace additions of Mn and V significantly increase electrical resistivity, with respective increments of about 0.353 ± 0.011 nΩ·m/0.01 wt.% (Mn) and 0.373 ± 0.009 nΩ·m/0.01 wt.% (V). Si has a weaker effect on electrical resistivity, with an increment of approximately 0.052 ± 0.001 nΩ·m/0.01 wt.% (Si), and the increase in electrical resistivity diminishes as the Si mass fraction increases. The study also shows that at 700 °C for 30 min, a stable, high-density VB₂ phase forms. With an average density more than twice that of the melt, VB₂ settles at the bottom of the melt and effectively removes V. These findings are significant for producing 8030 aluminum rods with lower electrical resistivity.

The structural design of electrode materials is an effective strategy for the improvement of the performance of energy storage devices. Hence, a 3D lamellar spherical electrode film of bamboo‐derived carbon (BDC)/Co‐doped MoS ₂ (Co‐doped MoS ₂ @10A‐BDC) is synthesized via a two‐step method in this work. Remarkably, the Co‐doped MoS ₂ @10A‐BDC displays a specific capacitance of 1070 F g ⁻¹ at 1.0 A g ⁻¹ . To further evaluate practical applicability of Co‐doped MoS ₂ @10A‐BDC, a supercapacitor device (Co‐doped MoS ₂ @10A‐BDC//10A‐BDC) is assembled achieves an energy density of 101.8 Wh kg ⁻¹ at 800 W kg ⁻¹ , and the capacity retention rate remains as high as 89.1% after 8000 cycles. To summarize, this work successfully synthesizes high‐capacitance and high‐energy‐density electrode materials using hydrothermal synthesis.

As the demand for lightweight and high-performance conductive materials grows in power transmission systems, aluminum alloy rods have emerged as a cost-effective and scalable alternative to copper conductors. This review systematically examines the development status and technological progress in the purification and casting–rolling processes used in the production of Electrical Round Aluminum Rods (ERARs). It explores current challenges in improving electrical conductivity and mechanical strength while addressing issues such as hydrogen and oxide inclusion removal, grain refinement, and impurity segregation. Key purification techniques—including flux refining, gas treatment, filtration, and rotary injection—are compared in terms of performance, cost, and environmental impact. The paper also analyzes different casting–rolling methods, including continuous casting and rolling, twin-roll casting, and extrusion processes, with attention to process optimization and equipment design. Furthermore, emerging applications of artificial intelligence (AI) in predictive modeling, defect detection, and process parameter optimization are highlighted, offering a novel perspective on intelligent and sustainable ERAR production. This paper aims to provide insights for facilitating the industrial-scale production and performance enhancement of ERAR materials.

Secondary Al-Si alloys typically encompass several impurities that substantially influence the materials’ microstructure and mechanical performance. This study employed a composite addition of chlorinated salt fluxing and an aluminum–boron master alloy to reduce the levels of the impurity elements magnesium (Mg), titanium (Ti), and vanadium (V) in secondary Al-Si alloys. The investigation of the performance mechanism revealed that the distribution of alloys’ grain orientation and the ratio of small-angle grain boundaries were modified via synergistic purification, leading to the refined microstructure and mechanical performance of secondary Al-Si alloys. The removal rates of impurity elements under these optimal refining conditions were 89.9% for Mg, 68.9% for Ti, and 61.5% for V. The refined alloy exhibited a 45.5% decrease in grain size and a 28.7% improvement in tensile strength compared to the raw material. These findings demonstrate that fluxing can improve the extraction of Ti and V from secondary Al-Si alloy melts of aluminum–boron master alloys, providing a new cost-effective strategy for the removal of impurities and the optimization of the properties of secondary Al-Si alloys.

Transitional bimetallic sulfides have garnered significant interest due to their versatile redox reactions, strong electrochemical activity, and cost-effectiveness. However, their low energy density and poor rate performance have hindered their use in energy storage systems. To overcome these challenges, we have developed a Co₂O₃@CoMo₂S₄ core–shell structure using a strategic design approach, serving as a conductive framework for supercapacitors. The innovative Co₂O₃@CoMo₂S₄ core–shell structure exhibits exceptional performance, achieving a specific capacitance of 4951.8 F g^–1 at 1 A g^–1 and retaining 90.85% cyclic stability after 5500 cycles, outperforming most reported transitional bimetallic sulfides. The Co₂O₃@CoMo₂S₄//AC supercapacitor achieves an energy density of 41.66 Wh kg^–1 and a power density of 0.35 kW kg^–1. Our research paves the way for the development of transitional bimetallic sulfides with core–shell structures that offer superior performance in supercapacitor applications, providing valuable insights for future advancements in the field.

Supercapacitors are widely used in many fields owing to their advantages, such as high power, good cycle performance, and fast charging speed. Among the many metal-oxide cathode materials reported for supercapacitors, NiMoO₄ is currently the most promising electrode material for high-specific-energy supercapacitors. We have employed a rational design approach to create a nanorod-like NiMoO₄ structure, which serves as a conductive scaffold for supercapacitors; the straightforward layout has led to outstanding results, with nanorod-shaped NiMoO₄ exhibiting a remarkable capacity of 424.8 F g^-1 at 1 A g^-1 and an impressive stability of 80.2% capacity preservation even after 3500 cycles, which surpasses those of the majority of previously reported NiMoO₄ materials. NiMoO₄//AC supercapacitors demonstrate a remarkable energy density of 46.31 W h kg^-1 and a power density of 0.75 kW kg^-1. This synthesis strategy provides a facile method for the fabrication of bimetallic oxide materials for high-performance supercapacitors.