Energy Storage Mechanism in Supercapacitors with Porous Graphdiynes: Effects of Pore Topology and Electrode Metallicity

被引：51

作者：

Mo, Tangming ^{[1
,2
]}

Wang, Zhenxiang ^{[1
]}

Zeng, Liang ^{[1
]}

Chen, Ming ^{[1
]}

Kornyshev, Alexei A. ^{[3
]}

Zhang, Mingcai ^{[4
]}

Zhao, Yongqing ^{[4
]}

Feng, Guang ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol HUST, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

[2] Guangxi Univ, Sch Mech Engn, Nanning 530004, Guangxi, Peoples R China

[3] Imperial Coll London, Dept Chem, Mol Sci Res Hub, White City Campus, London W12 0BZ, England

[4] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lab Special Funct Mat & Struct Design Minist Educ, Lanzhou 730000, Peoples R China

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 33期

基金：

中国国家自然科学基金;

关键词：

energy storage mechanism; porous graphdiynes; porous 2D materials; supercapacitors; superionic state; METAL-ORGANIC FRAMEWORKS; IONIC LIQUIDS; QUANTUM CAPACITANCE; NANOPOROUS CARBON; ALGORITHMS; SIMULATION; MODEL; BULK;

D O I：

10.1002/adma.202301118

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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.

引用

页数：10

共 72 条

[1] Molecular Dynamics Simulations of Ionic Liquids and Electrolytes Using Polarizable Force Fields [J].