High-performance supercabattery based on reduced graphene oxide/metal organic framework nanocomposite decorated with palladium nanoparticles

被引：20

作者：

Teffu, Daniel M. ^{[1
]}

Ramoroka, Morongwa E. ^{[2
]}

Makhafola, Mogwasha D. ^{[1
]}

Makgopa, Katlego ^{[3
]}

Maponya, Thabiso C. ^{[1
]}

Seerane, Ostar A. ^{[3
]}

Hato, Mpitloane J. ^{[1
]}

Iwuoha, Emmanuel I. ^{[2
]}

Modibane, Kwena D. ^{[1
]}

机构：

[1] Univ Limpopo Turfloop, Sch Phys & Mineral Sci, Dept Chem, Nanotechnol Res Lab, ZA-0727 Polokwane, Sovenga, South Africa

[2] Univ Western Cape, Chem Sci Dept, SensorLab, ZA-7535 Cape Town, South Africa

[3] Tshwane Univ Technol, Fac Sci, Dept Chem, Acardia Campus, ZA-0001 Pretoria, South Africa

来源：

ELECTROCHIMICA ACTA | 2022年 / 412卷

基金：

芬兰科学院; 新加坡国家研究基金会;

关键词：

Nanocomposite; Metal-organic framework; Palladium nanoparticles; Reduced-graphene oxide; Supercabattery; MICROWAVE-ASSISTED SYNTHESIS; SUPERCAPACITOR ELECTRODES; HIGH-ENERGY; OXIDE; COMPOSITE; MOF; REDUCTION; ELECTROCATALYST; NANOSHEETS;

D O I：

10.1016/j.electacta.2022.140136

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Reduced graphene oxide/metal organic framework nanocomposite decorated with palladium nanoparticles (Pd-rGO/MOF) was studied as an efficient electrode material for energy storage applications using nickel foam (NF) as a current collector and aqueous 3.0 M KOH as electrolyte. Pd-rGO/MOF nanocomposite showed a morphology in which a thin layer of rGO coating existed over MOF with unique bright spots indicating the presence of Pd nanoparticles. The synthesised materials were analysed by cyclic voltammetry (CV), electrochemical impedance spectrometry (EIS), and galvanostatic charge-discharge (GCD) for application in supercabattery. The Pd-rGO/ MOF nanocomposite displayed improved electron transfer kinetics and superior battery-type performance with a large specific capacity of 712.0 C g(-1) at 2.0 A g(-1) in a three-electrode system. Furthermore, Pd-rGO/MOF nanocomposite exhibited high electrochemical performance when applied as a positive electrode and activated carbon (AC) as a negative electrode in an asymmetric, two-electrode system, configuration. The AC//Pd-rGO/ MOF displayed an excellent maximum energy density of 26.0 Wh kg(-1) (at 0.6 A g(-1)), power density of 1600 W kg(-1) (at 2.0 A g(-1)), and good charge-discharge stability after 3500 cycles. This highlights the impact of Pd nanoparticles on the rGO/MOF nanocomposite for energy storage applications in supercabattery.

引用

页数：12

共 47 条

[1] MOF-derived crumpled-sheet-assembled perforated carbon cuboids as highly effective cathode active materials for ultra-high energy density Li-ion hybrid electrochemical capacitors (Li-HECs) [J].