材料科学
超级电容器
氧化物
介孔材料
非阻塞I/O
储能
氧化镍
功率密度
电容
化学工程
纳米材料
电化学
纳米技术
电极
电流密度
冶金
化学
催化作用
物理化学
功率(物理)
工程类
物理
量子力学
生物化学
作者
Rohan B. Ambade,Hojae Lee,Ki Hyun Lee,Hyeonhoo Lee,Ganesh Kumar Veerasubramani,Young‐Beom Kim,Tae Hee Han
标识
DOI:10.1016/j.cej.2022.135041
摘要
Ultrafast flashlight sintering (FLS) has become an important green manufacturing technology for the structural reformation of various nanomaterials. Nickel oxide (NiO) has been extensively studied as a promising electrode material for electrochemical energy storage owing to its high theoretical specific capacitance, low cost, and appropriate chemical compatibility. This study reports the fabrication of mesoporous ultrathin NiO nanosheets on carbon cloth (CC) as green electrodes for flexible supercapacitors (SCs) through an exceptional ultrafast millisecond FLS process at room temperature. The optimized [email protected]i12J electrode exhibited a remarkable specific capacity of 202.3 mA h g−1 (1215 F g−1) at a current density of 2 A g−1. Strikingly, the as-fabricated FLS-NiO electrodes outperformed the time and energy-consuming conventional thermally annealed (CTA) NiO electrodes. Furthermore, the flexible [email protected]i12J//rGO asymmetric SCs deliver a remarkable energy density of 47.18 Wh kg−1 at a power density of 758.37 W Kg−1 and extraordinary cycling stability performance after 15,000 cycles. In addition, the [email protected]i12J electrodes offer unique mesoporous structures, high surface areas, and numerous open-pore channels of ultrathin NiO nanosheets that facilitate fast transport of ions and rapid redox reactions. Thus, the present approach is promising for designing advanced electrode materials for flexible energy storage applications.
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