Fabrication of a High-Energy Flexible All-Solid-State Supercapacitor Using Pseudocapacitive 2D-Ti3C2Tx-MXene and Battery-Type Reduced Graphene Oxide/Nickel–Cobalt Bimetal Oxide Electrode Materials

2020 ◽  
Vol 12 (47) ◽  
pp. 52749-52762
Author(s):  
Amar M. Patil ◽  
Nutthaphak Kitiphatpiboon ◽  
Xiaowei An ◽  
Xiaoqiong Hao ◽  
Shasha Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
High Energy ◽  
Oxide Electrode ◽  
Nickel Cobalt ◽  
Reduced Graphene

Nitrogen-Enriched Reduced Graphene Oxide for High Performance Supercapacitor Electrode

2020 ◽  
Vol 20 (8) ◽  
pp. 4854-4859 ◽  
Author(s):  
Lei Chen ◽  
Xu Chen ◽  
Yaqiong Wen ◽  
Bixia Wang ◽  
Yangchen Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
High Performance ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Oxide Electrode ◽  
Reduced Graphene

Nitrogen-enriched reduced graphene oxide electrode material can be successfully prepared through a simple hydrothermal method. The morphology and microstructure of ready to use electrode material is measured by field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). Physical characterizations revealed that nitrogen-enriched reduced graphene oxide electrode material possessed high specific surface area of 429.6 m2 · g−1, resulting in high utilization of electrode materials with electrolyte. Electrochemical performance of nitrogen-enriched reduced graphene oxide electrode was also investigated by cyclic voltammetry (CV), galvanostatic charge/discharge measurements and electrochemical impedance spectroscopy (EIS) in aqueous in 6 M KOH with a three-electrode system, which displayed a high specific capacitance about 223.5 F · g−1 at 1 mV · s−1. More importantly, nitrogenenriched reduced graphene oxide electrode exhibited outstanding stability with 100% coulombic efficiency and with no specific capacitance loss under 2 A · g−1 after 10000 cycles. The supercapacitive behaviors indicated that nitrogen-enriched reduced graphene oxide can be a used as a promising electrode for high-performance super-capacitors.

Facile synthesis of nickel–cobalt sulfide/reduced graphene oxide hybrid with enhanced capacitive performance

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58777-58783 ◽  
Author(s):  
Xiaoqing Cai ◽  
Xiaoping Shen ◽  
Lianbo Ma ◽  
Zhenyuan Ji ◽  
Lirong kong
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Cobalt Sulfide ◽  
Facile Synthesis ◽  
One Pot ◽  
Nickel Cobalt ◽  
Excellent Electrochemical Performance ◽  
Reduced Graphene

A facile one-pot refluxing method was developed to prepare nickel–cobalt sulfide/reduced graphene oxide (RGO) hybrids. The as-synthesized NiCo2S4/RGO hybrids as electrode materials for supercapacitors exhibit excellent electrochemical performance.

Electrodepositing a 3D porous rGO electrode for efficient hydrogel electrolyte integration towards 1.6 V flexible symmetric supercapacitors

2019 ◽  
Vol 55 (57) ◽  
pp. 8282-8285 ◽  
Author(s):  
Kaizheng Song ◽  
Yuqi Jiang ◽  
Xiang Pang ◽  
Yuanyuan Li ◽  
Jinping Liu
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Hierarchical Architecture ◽  
Oxide Electrode ◽  
Reduced Graphene

A reduced graphene oxide electrode with a 3D hierarchical architecture achieves 3D penetration of hydrogel, giving rise to a high-performance quasi-solid-state supercapacitor.

scholarly journals Synthesis of Reduced Graphene Oxide-Modified LiMn0.75Fe0.25PO4 Microspheres by Salt-Assisted Spray Drying for High-Performance Lithium-Ion Batteries

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Myeong-Seong Kim ◽  
Hyun-Kyung Kim ◽  
Suk-Woo Lee ◽  
Dong-Hyun Kim ◽  
Dianbo Ruan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
Spray Drying ◽  
Electrode Materials ◽  
High Energy ◽  
Mixed Solution ◽  
Phase Purity ◽  
Reduced Graphene ◽  
Tap Density

Abstract Microsized, spherical, three-dimensional (3D) graphene-based composites as electrode materials exhibit improved tap density and electrochemical properties. In this study, we report 3D LiMn0.75Fe0.25PO4/reduced graphene oxide microspheres synthesized by one-step salt-assisted spray drying using a mixed solution containing a precursor salt and graphene oxide and a subsequent heat treatment. During this process, it was found that the type of metal salt used has significant effects on the morphology, phase purity, and electrochemical properties of the synthesized samples. Furthermore, the amount of the chelating agent used also affects the phase purity and electrochemical properties of the samples. The composite exhibited a high tap density (1.1 g cm−3) as well as a gravimetric capacity of 161 mA h g−1 and volumetric capacity of 281 mA h cm−3 at 0.05 C-rate. It also exhibited excellent rate capability, delivering a discharge capacity of 90 mA h g−1 at 60 C-rate. Furthermore, the microspheres exhibited high energy efficiency and good cyclability, showing a capacity retention rate of 93% after 1000 cycles at 10 C-rate.

All-solid-state asymmetric supercapacitors based on Fe-doped mesoporous Co3O4and three-dimensional reduced graphene oxide electrodes with high energy and power densities

Nanoscale ◽  
2017 ◽  
Vol 9 (40) ◽  
pp. 15423-15433 ◽  
Author(s):  
Cheng Zhang ◽  
Jun Wei ◽  
Leiyi Chen ◽  
Shaolong Tang ◽  
Mingsen Deng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
Three Dimensional ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Oxide Electrodes ◽  
Reduced Graphene ◽  
Power Densities

A novel all-solid-state asymmetric supercapacitor with high energy and power densities has been fabricated.

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