Park Ok-Kyung, Kim Nam Hoon, Lee Joong Hee
Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea.
Carbon Composite Research Center, Department of Polymer-Nano Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea.
Nanoscale. 2024 Aug 7;16(30):14448-14458. doi: 10.1039/d4nr01289e.
Due to the increasing demand for the development of efficient renewable energy supply systems to reduce the mismatch between energy demand and utilization, supercapacitors have attracted increasing attention in the energy industry. However, the development of energy storage electrode materials to be applied at the industrial level is still challenging due to the unsatisfactory durability and scalable production issues. This study suggested a facile and scalable one-pot fabrication method of using graphene/hexagonal boron nitride (G/BN)-based one-dimensional (1D) van der Waals superlattice heterostructures (vdWSLs) as highly stable electrode materials to enhance the energy storage performance by improving the mesopore volume content, specific surface area, electrical properties, and interfacial interaction between the stacked G/BN layers. The G/BN-based vdWSLs were fabricated by a simple scrolling process through the electromagnetic interaction between the attached magnetic iron oxide nanoparticles (FeO NPs) on the surface of a G/BN vdW heterostructure (vdWH) and the applied magnetic field. The investigation results demonstrate that the changed morphology of the fabricated G/Fe/BN(NS) strongly affects the fine pore distribution, electrochemical performance, and electrical properties. Consequently, as a synergistic effect of an increased mesopore volume content, specific surface area, and C-B-N heterojunction interfacial area, the fabricated G/Fe/BN(NS) electrode showed a 100% enhancement of specific capacitance (207 F g at 0.5 A g) and almost 7 times enhancement of electrical conductivity (800 S cm) with a nearly 2.3 times increase of carrier mobility (716 cm V s) compared to that of the G/Fe/BN electrode. Furthermore, it exhibited outstanding long-term cycling stability with almost 119% capacitance retention even after 100 000 charge-discharge cycles. These results suggest that G/Fe/BN(NS) has tremendous potential as an electrode to fabricate high-performance supercapacitors with excellent cycling stability.
由于开发高效可再生能源供应系统以减少能源需求与利用之间不匹配的需求不断增加，超级电容器在能源行业中受到了越来越多的关注。然而，由于耐久性和可扩展生产问题不尽人意，应用于工业水平的储能电极材料的开发仍然具有挑战性。本研究提出了一种简便且可扩展的一锅法制备方法，使用基于石墨烯/六方氮化硼（G/BN）的一维（1D）范德华超晶格异质结构（vdWSLs）作为高度稳定的电极材料，通过改善中孔体积含量、比表面积、电学性能以及堆叠的G/BN层之间的界面相互作用来提高储能性能。基于G/BN的vdWSLs通过一种简单的滚动工艺制备，该工艺利用附着在G/BN范德华异质结构（vdWH）表面的磁性氧化铁纳米颗粒（FeO NPs）与施加的磁场之间的电磁相互作用。研究结果表明，制备的G/Fe/BN(NS)的形态变化强烈影响细孔分布、电化学性能和电学性能。因此，作为中孔体积含量、比表面积和C-B-N异质结界面面积增加的协同效应，制备的G/Fe/BN(NS)电极的比电容提高了100%（在0.5 A g时为207 F g），电导率提高了近7倍（800 S cm），载流子迁移率提高了近2.3倍（716 cm V s），与G/Fe/BN电极相比。此外，它表现出出色的长期循环稳定性，即使在100000次充放电循环后，电容保持率仍接近119%。这些结果表明，G/Fe/BN(NS)作为制造具有优异循环稳定性的高性能超级电容器的电极具有巨大潜力。
