能量传输
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新型石墨烯结构兼具高功率和高能量密度
Ke Ji Ri Bao· 2025-09-19 00:40
Core Insights - Australian researchers from Monash University have developed a highly curved graphene structure that combines high power and high energy density, paving the way for superior supercapacitors, which are essential for electrified transportation, grid stability, and next-generation consumer electronics [1] Group 1: Supercapacitor Development - Supercapacitors store charge electrostatically, differing from batteries that rely on chemical reactions, but have faced a critical limitation due to the low surface area of carbon materials available for energy storage [1] - The research team discovered that adjusting the thermal treatment of the material significantly increases its usable surface area, enabling the production of supercapacitors that can charge quickly while storing large amounts of energy, thus allowing them to replace batteries in various applications [1] Group 2: Material Structure and Performance - The breakthrough centers on a new material structure called "multiscale reduced graphene oxide," created using Australia's abundant natural graphite through a rapid thermal annealing process, which provides efficient pathways for ion migration, resulting in both high power and high energy density in a single device [1] - The assembled supercapacitor demonstrated an energy density of 99.5 watt-hours per liter and a power density of 69.2 kilowatts per liter, along with rapid charging capabilities and excellent cycling stability, placing these performance metrics among the best in carbon-based supercapacitors, with the fabrication process being scalable [2]