超级电容器
材料科学
堆积
电容
多孔性
电极
储能
多孔介质
纳米技术
拓扑(电路)
化学工程
复合材料
有机化学
化学
物理化学
热力学
物理
功率(物理)
数学
组合数学
工程类
作者
Tangming Mo,Zhenxiang Wang,Liang Zhang,Ming Chen,Alexei A. Kornyshev,Mingcai Zhang,Yongqing Zhao,Guang Feng
标识
DOI:10.1002/adma.202301118
摘要
Porous graphdiynes are a new class of porous 2D materials with tunable electronic structures and various pore structures. They have potential applications as well-defined nanostructured electrodes and can provide platforms for understanding energy storage mechanisms underlying supercapacitors. Herein, the effect of stacking structure and metallicity on energy storage with such electrodes is investigated. Simulations reveal that supercapacitors based on porous graphdiynes of AB stacking structure can achieve both higher double-layer capacitance and ionic conductivity than AA stacking. This phenomenon is ascribed to more intense image forces in AB stacking, leading to a breakdown of ionic ordering and the formation of effective "free ions". Macroscale analysis shows that doped porous graphdiynes can deliver outstanding gravimetric and volumetric energy and power densities due to their enhanced quantum capacitance. These findings pave the way for designing high-performance supercapacitors by regulating pore topology and metallicity of electrode materials.
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