Hierarchical CuO nanorod arrays in situ generated on three-dimensional copper foam via cyclic voltammetry oxidation for high-performance supercapacitors

2018 ◽  
Vol 6 (22) ◽  
pp. 10474-10483 ◽  
Author(s):  
Ying Liu ◽  
Xueying Cao ◽  
Degang Jiang ◽  
Dedong Jia ◽  
Jingquan Liu
Keyword(s):  
Cyclic Voltammetry ◽  
High Performance ◽  
Three Dimensional ◽  
Chemical Oxidation ◽  
Superior Performance ◽  
Nanorod Arrays ◽  
Supercapacitor Electrode ◽  
Copper Foam

A supercapacitor electrode with superior performance based on hierarchical CuO nanorod arrays on copper foam is achieved by successive in situ chemical oxidation, calcination and cyclic voltammetry oxidation strategies.

A one-step, cost-effective green method to in situ fabricate Ni(OH)2 hexagonal platelets on Ni foam as binder-free supercapacitor electrode materials

2015 ◽  
Vol 3 (5) ◽  
pp. 1953-1960 ◽  
Author(s):  
Lingjie Li ◽  
Jing Xu ◽  
Jinglei Lei ◽  
Jie Zhang ◽  
Frank McLarnon ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Cost Effective ◽  
Ni Foam ◽  
Supercapacitor Electrode ◽  
One Step ◽  
Binder Free ◽  
Supercapacitor Electrode Materials

The Ni(OH)2 hexagonal platelets were in situ fabricated on Ni foam as a binder-free supercapacitor electrode material with high performance and excellent cycling stability by a one-step, cost-effective, green hydrothermal treatment of three-dimensional (3D) Ni foam in a 15 wt% H2O2 aqueous solution.

Hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays in situ grown on three-dimensional copper foam for high-performance solid-state supercapacitors

2017 ◽  
Vol 5 (20) ◽  
pp. 9960-9969 ◽  
Author(s):  
Sheng Zhu ◽  
Zidan Wang ◽  
Fangzhi Huang ◽  
Hui Zhang ◽  
Shikuo Li
Keyword(s):  
Solid State ◽  
High Performance ◽  
Three Dimensional ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Electrochemical Performances ◽  
Copper Foam

Well-aligned hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays in situ grown on conductive copper foams as binder- and conductive-free electrodes display superior electrochemical performances.

Hierarchical Ni3S2 nanorod@nanosheet arrays on Ni foam for high-performance supercapacitor

2021 ◽  
Author(s):  
Haibin Sun ◽  
Shuang-Shuang Liang ◽  
Zijun Xu ◽  
Wenrui Zheng ◽  
Xiaoyu Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Ostwald Ripening ◽  
Performance Enhancement ◽  
Three Dimensional ◽  
Negative Electrode ◽  
Hierarchical Architecture ◽  
Nanorod Arrays ◽  
Ni Foam ◽  
Supercapacitor Electrode ◽  
Nanosheet Arrays

Abstract We successfully designed and prepared hierarchical Ni3S2 nanosheet@nanorod arrays on three-dimensional Ni foam via facile hydrothermal sulfuration. We conducted a series of time- and temperature-dependent experiments to determine the Ostwald ripening process of hierarchical Ni3S2 nanosheet@nanorod arrays. The rationally hierarchical architecture creates an excellent supercapacitor electrode for Ni3S2 nanosheet@nanorod arrays. The areal capacitance of this array reaches 5.5 F cm-2 at 2 mA cm-2, which is much higher than that of Ni3S2 nanosheet arrays (1.5 F cm-2). The corresponding asymmetric supercapacitor exhibits a wide potential window of 1.6 V and energy density up to 1.0 Wh cm-2 when the proposed array is utilized as the positive electrode with activated carbon as the negative electrode. This electrochemical performance enhancement is attributable to the hierarchical structure and synergistic cooperation of macroporous Ni foam and well-aligned Ni3S2 nanosheet@nanorod arrays. Our results represent a promising approach to the preparation of hierarchical nanosheet@nanorod arrays as high-performing electrochemical capacitors.

scholarly journals Three-dimensional Porous Graphene/Polyaniline Hybrids for High Performance Supercapacitor Electrodes

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Zhaoxia HOU ◽  
Peng SHI ◽  
Shengnan ZOU
Keyword(s):  
High Performance ◽  
Oxidative Polymerization ◽  
Three Dimensional ◽  
Koh Activation ◽  
Nanorod Arrays ◽  
Chemical Oxidative Polymerization ◽  
Porous Graphene ◽  
Initial Capacity ◽  
2D To 3D

Graphene-based composites took extensive attraction as electrodes for supercacitors these years. Three-dimensional cross-linking porous graphene (3D rGO-m) was obtained by KOH activation to graphene modified by 1,2,4-triaminobenzene. 3D porous graphene/ polyaniline hybrids (3D rGO-m/PANI) was prepared by the in-situ chemical oxidative polymerization. The rGO-m are reconstructed from 2D to 3D porous structure after KOH activation. The PANI nanorod arrays are successfully decorated on the surface of the 3D porous graphene sheets. The specific capacitance of the 3D rGO-m/PANI hybrids reach 985 F/g at 0.5 A/g. The capacitance retention of 3D rGO-m/PANI maintains 90% of its initial capacity after 1000 cycles, while rGO-m/PANI only keeps 83% of its initial capacity, the cycling stability of both hybrids are higher than that of pure PANI (69%).

A novel 3D porous electrode of polyaniline and PEDOT:PSS coated SiNWs for low-cost and high-performance supercapacitors

2021 ◽  
Author(s):  
Xiaojuan Shen ◽  
Xuan Zhang ◽  
Tongfei Wang ◽  
Songjun Li ◽  
Zhaoqiang Li
Keyword(s):  
High Performance ◽  
Solution Method ◽  
In Situ Polymerization ◽  
Low Cost ◽  
Porous Electrode ◽  
Simple Solution ◽  
Porous Si ◽  
Supercapacitor Electrode

In this study, a novel 3D porous Si-based supercapacitor electrode was developed by the simple solution method, which involved firstly the in-situ polymerization of polyaniline particles (PANI) on the Si...

Synthesis of hierarchical porous CuO Nanowire@NiCo-layered double hydroxide core-shell structured nanoarrays on copper foam for high-performance supercapacitors

2017 ◽  
Author(s):  
Guo Hengzhi ◽  
Ben Qing ◽  
Shuxing Wu ◽  
Oscar K.S. Hui ◽  
Zalnezhad Erfan
Keyword(s):  
Layered Double Hydroxide ◽  
High Performance ◽  
Three Dimensional ◽  
Core Shell ◽  
Deposition Technique ◽  
Cuo Nanowires ◽  
Copper Foam ◽  
Hierarchical Porous ◽  
Cuo Nanowire ◽  
Double Hydroxide

In this work, a facile potentiostatic deposition technique was used to fabricate a three-dimensional (3D) core-shell structured nanoarray composed of hierarchical porous CuO nanowires@NiCo layered double hydroxide nanosheets (CuO NWAs@NiCo-LDH)...

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