scholarly journals Facile hydrothermal synthesis of porous MgCo2O4 nanoflakes as an electrode material for high-performance asymmetric supercapacitors

2020 ◽  
Vol 2 (8) ◽  
pp. 3263-3275
Author(s):  
Huiyu Chen ◽  
Xuming Du ◽  
Runze Wu ◽  
Ya Wang ◽  
Jiale Sun ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Electrode Material ◽  
High Performance ◽  
Annealing Treatment ◽  
Electrochemical Performances ◽  
Hydrothermal Route ◽  
Asymmetric Supercapacitors ◽  
Post Annealing

A simple hydrothermal route with a post annealing treatment was used to prepare MgCo2O4 porous nanoflakes with excellent electrochemical performances.

Hybrid ZnCo2O4@Co3S4 Nanowires for High-Performance Asymmetric Supercapacitors

2020 ◽  
Vol 15 (12) ◽  
pp. 1552-1558
Author(s):  
Yongli Tong ◽  
Xinyu Cheng ◽  
Dongli Qi ◽  
Baoqian Chi ◽  
Weiqiang Zhang
Keyword(s):  
High Performance ◽  
Reaction Path ◽  
Nickel Foam ◽  
Energy Storage Materials ◽  
Electrochemical Performances ◽  
Hydrothermal Route ◽  
Asymmetric Supercapacitors ◽  
High Area ◽  
Facile Hydrothermal Route

We successfully fabricate hierarchical ZnCo2O4@Co3S4 nanowires directly supported on nickel foam by a facile hydrothermal route. The as-synthesized product possesses large specific surface area and short reaction path, which result in superior electrochemical performances as the electrode of supercapacitor (SC). The obtained electrode material shows high area capacitance of 2.02 C g-1 at current density of 0.8 A g-1 with 95.3% retention of initial capacitance after 6000 cycles. Moreover, the assembled asymmetric supercapacitor (ASC) device using ZnCo2O4@Co3S4 nanowires as anode material displays noticeable electrochemical capability with an energy density of 79.8 mW h g-1 at power density of 1795 W kg-1 and 73.2 mW h g-1 at 9760 W kg-1. In addition, the device shows remarkable cycling capability, maintaining 82.2% retention after long-term cycles. It reveals the as-fabricated material would be promising energy storage materials.

Construction of Hierarchical Ni(OH)2@CoMoO4 Nanoflake Composite for High-Performance Supercapacitors

NANO ◽  
2016 ◽  
Vol 11 (05) ◽  
pp. 1650050 ◽  
Author(s):  
Xueqing Li ◽  
Shuang-Yan Lin ◽  
Mingyi Zhang ◽  
Ge Jiang ◽  
Hong Gao
Keyword(s):  
Current Density ◽  
Electrode Material ◽  
High Performance ◽  
Synergetic Effect ◽  
Electrochemical Performances ◽  
Ni Foam ◽  
Areal Capacitance ◽  
Binder Free ◽  
Electrochemical Electrode

Hierarchical Ni(OH)2@CoMoO4 nanoflake composite on Ni foam was successfully constructed by electrodepositing Ni(OH)2 onto CoMoO4 nanoflake and investigated as binder-free electrodes for supercapacitor. The composite shows a large areal capacitance of 5.23[Formula: see text]F[Formula: see text]cm[Formula: see text] at current density of 8[Formula: see text]mA[Formula: see text]cm[Formula: see text], and a capacitance retention of 82.5% after 1000 cycles. The high electrochemical performances can be attributed to the hierarchical nanoflakes structure and the synergetic effect between Ni(OH)2 nanosheets and CoMoO4 nanoflakes. This work demonstrates that Ni(OH)2@CoMoO4 nanoflake composite is highly desirable for application as advanced electrochemical electrode material.

One-pot hydrothermal synthesis of peony-like Ag/Ag0.68V2O5 hybrid as high-performance anode and cathode materials for rechargeable lithium batteries

Nanoscale ◽  
2014 ◽  
Vol 6 (10) ◽  
pp. 5239-5244 ◽  
Author(s):  
Denghu Wei ◽  
Xiaona Li ◽  
Yongchun Zhu ◽  
Jianwen Liang ◽  
Kailong Zhang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Hierarchical Structure ◽  
Electrode Material ◽  
Lithium Batteries ◽  
Cathode Materials ◽  
High Performance ◽  
Rechargeable Lithium Batteries ◽  
One Pot ◽  
Superior Cycling Stability ◽  
Unique Hierarchical Structure

We proposed a simple but effective method to synthesize a peony-like Ag/Ag0.68V2O5 hybrid and explored the effects of its unique hierarchical structure on the superior cycling stability as electrode material for rechargeable lithium batteries.

Free-standing ultrathin CoMn2O4 nanosheets anchored on reduced graphene oxide for high-performance supercapacitors

2015 ◽  
Vol 44 (43) ◽  
pp. 18737-18742 ◽  
Author(s):  
Guoxin Gao ◽  
Shiyao Lu ◽  
Yang Xiang ◽  
Bitao Dong ◽  
Wei Yan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Annealing Treatment ◽  
Trisodium Citrate ◽  
Precipitation Method ◽  
Free Standing ◽  
Post Annealing ◽  
Reduced Graphene ◽  
Co Precipitation

Free-standing ultrathin CoMn2O4 nanosheets are successfully assembled on reduced graphene oxide via a simple trisodium citrate (TSC) assisted co-precipitation method with a post-annealing treatment.

scholarly journals Biomass based porous carbon for supercapacitor by hydrothermal assisted activating method

2021 ◽  
Vol 236 ◽  
pp. 01016
Author(s):  
Congcong Huang ◽  
Yunhui Dong ◽  
Xingjun Dong
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Activated Carbons ◽  
High Capacity ◽  
Rate Capability ◽  
High Energy ◽  
High Energy Density ◽  
Koh Activation ◽  
Electrochemical Performances ◽  
Adsorption Desorption

A facile route has been employed to synthesize a series of high performance activated carbons as the electrode material for supercapacitors. The structure of the carbons are characterized by N2 adsorption/desorption and FTIR spectroscopy. The electrochemical performances of the carbons as an electrode material were evaluated by cyclic voltammetry test and galvanostatic charge/discharge measurements. As a biomass derived carbon, KOH-1 exhibits high capacity, good rate capability and high energy density, indicating the promising application of hydrothermal combining with KOH activation method for biomass materials that used in supercapacitors

Co3O4-doped two-dimensional carbon nanosheet as an electrode material for high-performance asymmetric supercapacitors

2020 ◽  
Vol 335 ◽  
pp. 135611 ◽  
Author(s):  
Xueying Yang ◽  
Chenglong Cai ◽  
Yongjin Zou ◽  
Cuili Xiang ◽  
Hailiang Chu ◽  
...  
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Two Dimensional ◽  
Asymmetric Supercapacitors
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