Hybrid cobalt-manganese oxides prepared by ordered steps with a ternary nanosheets structure and its high performance as binder-free electrode for energy storage

Nanoscale ◽  
2021 ◽  
Author(s):  
Qingjie Lu ◽  
Shiqiang Zhou ◽  
Mingpeng Chen ◽  
Bo Li ◽  
Haitang Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Metal Oxide ◽  
High Performance ◽  
Manganese Oxides ◽  
Binder Free ◽  
Hybrid Metal Oxide ◽  
Electrodes For Supercapacitors

Owing to without any additive in the preparation processes, binder-free electrodes for supercapacitors have attracted much attentions. Herein, a hybrid metal oxide which composed with graphene oxide (Co3O4/MnO2/GO) is prepared...

MOF-74 derived porous hybrid metal oxide hollow nanowires for high-performance electrochemical energy storage

2018 ◽  
Vol 6 (18) ◽  
pp. 8396-8404 ◽  
Author(s):  
Cuiping Yu ◽  
Yan Wang ◽  
Jiewu Cui ◽  
Dongbo Yu ◽  
Xinyi Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Metal Oxide ◽  
Metal Oxides ◽  
High Performance ◽  
Hollow Structure ◽  
Phase Evolution ◽  
Electrochemical Energy Storage ◽  
Excellent Performance ◽  
Hybrid Metal Oxide ◽  
Electrochemical Energy

Phase evolution of hybrid metal oxides derived from MOF-74 nanowires was investigated systematically, and NiO/NiCo2O4(1 : 1) nanowires with hollow structure exhibited excellent performance in energy storage.

scholarly journals Hierarchical Porous RGO/PEDOT/PANI Hybrid for Planar/Linear Supercapacitor with Outstanding Flexibility and Stability

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Fuwei Liu ◽  
Luoyuan Xie ◽  
Li Wang ◽  
Wei Chen ◽  
Wei Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Structural Design ◽  
High Performance ◽  
Rate Capability ◽  
Cotton Yarn ◽  
Reduced Graphene ◽  
Hierarchical Porous ◽  
Good Rate Capability ◽  
Electrodes For Supercapacitors

AbstractMany hybrid electrodes for supercapacitors (SCs) are a reckless combination without proper structural design that keeps them from fulfilling their potential. Herein, we design a reduced graphene oxide/poly(3,4-ethylenedioxythiophene)/polyaniline (RGO/PEDOT/PANI) hybrid with hierarchical and porous structure for high-performance SCs, where components fully harness their advantages, forming an interconnected and conductive framework with substantial reactive sites.Thus, this hybrid achieves a high capacitance of 535 F g−1 along with good rate capability and cyclability. The planar SC based on this hybrid deliver an energy density of 26.89 Wh kg−1 at a power density of 800 W kg−1. The linear SC developed via modifying a cotton yarn with the hybrid exhibits good flexibility and structural stability, which operates normally after arbitrary deformations. This work provides a beneficial reference for developing SCs.

scholarly journals Direct Patterning and Spontaneous Self-Assembly of Graphene Oxide via Electrohydrodynamic Jet Printing for Energy Storage and Sensing

Micromachines ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 13 ◽  
Author(s):  
Bin Zhang ◽  
Jaehyun Lee ◽  
Mincheol Kim ◽  
Naeeung Lee ◽  
Hyungdong Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Self Assembly ◽  
High Performance ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Layer By Layer ◽  
Energy Storage Devices ◽  
Laminar Structure ◽  
Jet Printing

The macroscopic assembly of two-dimensional materials into a laminar structure has received considerable attention because it improves both the mechanical and chemical properties of the original materials. However, conventional manufacturing methods have certain limitations in that they require a high temperature process, use toxic solvents, and are considerably time consuming. Here, we present a new system for the self-assembly of layer-by-layer (LBL) graphene oxide (GO) via an electrohydrodynamic (EHD) jet printing technique. During printing, the orientation of GO flakes can be controlled by the velocity distribution of liquid jet and electric field-induced alignment spontaneously. Closely-packed GO patterns with an ordered laminar structure can be rapidly realized using an interfacial assembly process on the substrates. The surface roughness and electrical conductivity of the LBL structure were significantly improved compared with conventional dispensing methods. We further applied this technique to fabricate a reduced graphene oxide (r-GO)-based supercapacitor and a three-dimensional (3D) metallic grid hybrid ammonia sensor. We present the EHD-assisted assembly of laminar r-GO structures as a new platform for preparing high-performance energy storage devices and sensors.

A general route to the synthesis of layer-by-layer structured metal organic framework/graphene oxide hybrid films for high-performance supercapacitor electrodes

2017 ◽  
Vol 5 (32) ◽  
pp. 16865-16872 ◽  
Author(s):  
Dongbo Yu ◽  
Liang Ge ◽  
Xinlai Wei ◽  
Bin Wu ◽  
Jin Ran ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
High Performance ◽  
Metal Organic Framework ◽  
Layer By Layer ◽  
Hybrid Films ◽  
Promising Strategy ◽  
Metal Organic ◽  
Organic Framework

A promising strategy is demonstrated for the syntheses of metal organic framework/graphene oxide hybrid films with highly ordered layer-by-layer architecture, and the derived hybrids exhibit remarkable energy storage performances.

scholarly journals Interfacial growth of free-standing PANI films: toward high-performance all-polymer supercapacitors

2021 ◽  
Author(s):  
Fuyao Zhong ◽  
Mingyu Ma ◽  
Zhuoran Zhong ◽  
Xinrong Lin ◽  
Mao Chen
Keyword(s):  
Thin Films ◽  
Energy Storage ◽  
High Performance ◽  
Free Standing ◽  
Binder Free ◽  
Interfacial Growth

A covalently cross-linked polyaniline network is synthesized via interfacial Buchwald-Hartwig polymerization/deprotection, enabling the generation of additive/binder-free and high-performance conducting thin-films for energy storage.

High-Performance Supercapacitors Based on ɛ-MnO2/RGO Fiber Electrodes for Wearable Energy Storage

2018 ◽  
Vol 18 (12) ◽  
pp. 8352-8359 ◽  
Author(s):  
Xibin Liu ◽  
Gaohua liao ◽  
Xiang Qi ◽  
Xiaoan Mei ◽  
Jifei Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
High Performance ◽  
Fiber Surface ◽  
Current Collector ◽  
Cost Effective ◽  
Surface Acting ◽  
Energy Storage Devices ◽  
Hybrid Fibers ◽  
Storage Devices

Hybrid fibers based on MnO2/reduced graphene oxide have been fabricated for flexible energy storage devices. Graphene oxide nanoflakes were reduced in a polytetrafluoroethylene (PTFE) pipeline under the appropriate condition to develop a fiber current collector, which also provides the possibility of weaving. The RGO fiber with the radius of about 35 μm has a resistance of 150 Ω · cm. MnO2 nanoflakes directly grow on the RGO fiber surface acting as the electrode material of the device. The MnO2/RGO hybrid fibers provide excellent energy storage performances. The as-fabricated SC exhibits a high areal capacitance of 1.37 F·cm−2 at the scan rate of 1 mV·s−1, and outstanding long-term cycling stability of 93.75% retention after 5000 cycles. This work demonstrates a cost-effective and versatile strategy for wearable energy storage devices.

Porous NiCo2O4 nanoarray-integrated binder-free 3D open electrode offers a highly efficient sensing platform for enzyme-free glucose detection

The Analyst ◽  
2018 ◽  
Vol 143 (11) ◽  
pp. 2546-2554 ◽  
Author(s):  
X. Luo ◽  
M. Huang ◽  
D. He ◽  
M. Wang ◽  
Y. Zhang ◽  
...  
Keyword(s):  
Metal Oxide ◽  
High Performance ◽  
Glucose Detection ◽  
Binary Metal ◽  
Highly Efficient ◽  
Sensing Platform ◽  
Binary Metal Oxide ◽  
Free Glucose ◽  
Binder Free

Porous binary metal oxide NiCo2O4 NWA/CC was prepared and utilized as a 3D binder-free open electrode for enzyme-free sensing with high performance.

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