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首页> 外文期刊>RSC Advances >Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors
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Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors

机译：分层合成银杏碳纳米颗粒/ NiAl层状双氢氧化物混合电极对高性能超级电容器的环保合成

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摘要

Three-dimensional carbon nanoparticles (CPs)/Ni-Al layered double hydroxide (NiAl-LDH) (CP/LDH) hybrids with hierarchical nanostructures have been facilely prepared with NiAl-LDH nanosheets homogeneously located on the surface of CPs through an in situ hydrothermal growth process. Eco-friendly synthesized from the fallen ginkgo leaves, CPs with mesoporous architecture are chemically activated and used as building blocks for the construction of hierarchical CP/LDH hybrids. Mesoporous CPs coupled with the NiAl-LDH nanosheets are favorable to improve the mass transfer, adsorption/desorption of ions, as well as the electrochemical performance of the electrodes. The electrochemical measurements show that CP/LDH hybrid exhibits a remarkably enhanced specific capacitance of 1355 F g(-1) at 5 mV s(-1), compared with 121 F g(-1) of CPs and 405 F g(-1) of pure NiAl-LDHs, as a result of the synergistic effect from electrochemical double layer capacitance of CPs and pseudocapacitance of NiAl-LDHs. Furthermore, the CP/LDH hybrid shows excellent rate capability and good long-term cycling performance with 90% capacitance retained after 2000 cycles. Therefore, the facilely prepared CP/LDH hybrids are promising electrode materials for potential applications in energy storage devices.
机译：通过原位水热法将均匀分布在CPs表面的NiAl-LDH纳米片轻松地制备了具有分层纳米结构的三维碳纳米粒子（CPs）/ Ni-Al层状双氢氧化物（NiAl-LDH）（CP / LDH）杂化物。生长过程。由堕落的银杏叶合成的生态友好型具有中孔结构的CP被化学活化，并用作构建CP / LDH分层杂种的基础。介孔CP与NiAl-LDH纳米片耦合有利于改善离子的传质，吸附/解吸以及电极的电化学性能。电化学测量表明，与121 F g（-1）的CP和405 F g（-1）相比，CP / LDH杂化物在5 mV s（-1）时具有1355 F g（-1）的比电容显着提高。 ），这是由于CP的电化学双层电容和NiAl-LDH的假电容的协同效应的结果。此外，CP / LDH混合动力车具有出色的速率能力和良好的长期循环性能，在2000次循环后仍保留90％的电容。因此，容易制备的CP / LDH杂化材料有望用于储能设备中的电极材料。

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