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The reporter learned from the Center for Advanced Materials Research at Zhongyuan University of Technology that Professor Mi Liwei and his team have developed a novel hollow spheroidal supercapacitor electrode material with enhanced electron and ionic conductivity. This breakthrough was achieved through meticulous molecular structure design, and the findings were recently published in the *Journal of Applied Materials and Interfaces*.
Supercapacitors, while promising for energy storage, often face limitations due to the poor conductivity of their electrode materials. As a result, electrochemical redox reactions typically occur only on the surface of the electrode, which significantly reduces the overall utilization of the material. To address this challenge, the research team focused on creating a more efficient electrode structure.
Using a self-growth and sacrificial template method, they successfully synthesized hollow-spheroidal nickel-nickel carbonate electrode materials with exceptional electron and ion conductivity. The unique crystal structure of these materials provides numerous metal bonds that act as efficient pathways for electron transport. Additionally, the presence of hydroxide and water molecules between one-dimensional chain units facilitates rapid ion movement, further enhancing performance.
Testing results demonstrated remarkable performance from the new electrode material. Even when the current density increased by 100 times, the capacitor retained an impressive 96.2% of its initial capacity. At a current density of 20 A/g, the specific capacitance reached up to 108.3 F/g. After 100,000 charge-discharge cycles at the same current density, the material maintained 85.8% of its original capacity. These results highlight the material’s potential for practical applications in high-performance supercapacitors.
With such outstanding performance, the newly developed electrode material is expected to play a significant role in advancing energy storage technologies, offering a viable solution for industrial use. This innovation not only improves the efficiency of supercapacitors but also paves the way for future developments in sustainable and high-capacity energy systems.
August 11, 2025