scholarly journals High mass loading flower-like MnO2 on NiCo2O4 deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors

RSC Advances ◽  
2021 ◽  
Vol 11 (27) ◽  
pp. 16161-16172
Author(s):  
Jing Jin ◽  
Jie Ding ◽  
Xing Wang ◽  
Congcong Hong ◽  
Huaping Wu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Nickel Foam ◽  
High Mass ◽  
Asymmetric Supercapacitor ◽  
Mass Loading ◽  
Asymmetric Supercapacitors ◽  
3D Graphene

A NiCo2O4/MnO2 heterostructure with high mass loading MnO2 microflowers was built on the surface of 3D graphene/nickel foam for the preparation of an asymmetric supercapacitor with splended energy density (45.9 Wh kg−1).

Sponge-like NiCo2S4 nanosheets supported on nickel foam as high-performance electrode materials for asymmetric supercapacitors

2021 ◽  
Vol 8 (1) ◽  
pp. 72-78
Author(s):  
Fuyong Ren ◽  
Yajun Ji ◽  
Shufen Tan ◽  
Fei Chen
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Nickel Foam ◽  
High Mass ◽  
Mass Loading ◽  
Ni Foam ◽  
Hydrothermal Route ◽  
Asymmetric Supercapacitors ◽  
One Step ◽  
Binder Free

Herein, binder-free sponge-like NiCo2S4 nanosheets supported on Ni foam with ultra-high mass loading were synthesized via a facile one-step hydrothermal route.

scholarly journals Atomic Modulation of 3D Conductive Frameworks Boost Performance of MnO2 for Coaxial Fiber-Shaped Supercapacitors

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaona Wang ◽  
Zhenyu Zhou ◽  
Zhijian Sun ◽  
Jinho Hah ◽  
Yagang Yao ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Superior Performance ◽  
High Mass ◽  
Mass Loading ◽  
Energy Storage Devices ◽  
Free Standing ◽  
Cell Potential

Abstract Coaxial fiber-shaped supercapacitors are a promising class of energy storage devices requiring high performance for flexible and miniature electronic devices. Yet, they are still struggling from inferior energy density, which comes from the limited choices in materials and structure used. Here, Zn-doped CuO nanowires were designed as 3D framework for aligned distributing high mass loading of MnO2 nanosheets. Zn could be introduced into the CuO crystal lattice to tune the covalency character and thus improve charge transport. The Zn–CuO@MnO2 as positive electrode obtained superior performance without sacrificing its areal and gravimetric capacitances with the increasing of mass loading of MnO2 due to 3D Zn–CuO framework enabling efficient electron transport. A novel category of free-standing asymmetric coaxial fiber-shaped supercapacitor based on Zn0.11CuO@MnO2 core electrode possesses superior specific capacitance and enhanced cell potential window. This asymmetric coaxial structure provides superior performance including higher capacity and better stability under deformation because of sufficient contact between the electrodes and electrolyte. Based on these advantages, the as-prepared asymmetric coaxial fiber-shaped supercapacitor exhibits a high specific capacitance of 296.6 mF cm−2 and energy density of 133.47 μWh cm−2. In addition, its capacitance retention reaches 76.57% after bending 10,000 times, which demonstrates as-prepared device’s excellent flexibility and long-term cycling stability.

scholarly journals Hierarchical Carbon Microtube@Nanotube Core–Shell Structure for High-Performance Oxygen Electrocatalysis and Zn–Air Battery

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenfu Xie ◽  
Jianming Li ◽  
Yuke Song ◽  
Shijin Li ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Mass ◽  
Core Shell ◽  
High Power Density ◽  
Mass Loading

AbstractZinc–air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core–shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air–cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm−2), specific capacity (781.7 mAhg Zn −1 ) as well as long cycle stability (117 h, 351 cycles). Moreover, the ZAB performance of CMT@CNT is maintained well even under high mass loading (3 mg cm−2, three times as much as traditional usage), which could afford high power density and energy density for advanced electronic equipment. We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries.

A three-dimensional graphene framework-enabled high-performance stretchable asymmetric supercapacitor

2018 ◽  
Vol 6 (4) ◽  
pp. 1802-1808 ◽  
Author(s):  
Ke Li ◽  
Yanshan Huang ◽  
Jingjing Liu ◽  
Mansoor Sarfraz ◽  
Phillips O. Agboola ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Three Dimensional ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Superior Cycling Stability

Three-dimensional graphene frameworks enable the development of stretchable asymmetric supercapacitors with a record high energy density of 77.8 W h kg−1, and also excellent stretchability and superior cycling stability.

Electrosynthesis of a corn flake-like NiO nanostructure on nickel foam for polymer gel electrolyte-based high performance asymmetric supercapacitors

2017 ◽  
Vol 41 (19) ◽  
pp. 10584-10591 ◽  
Author(s):  
Vijay S. Kumbhar ◽  
Moo Hwan Cho ◽  
Jintae Lee ◽  
Woo Kyoung Kim ◽  
Moonyong Lee ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Nickel Foam ◽  
Gel Electrolyte ◽  
Asymmetric Supercapacitor ◽  
Polymer Gel ◽  
Polymer Gel Electrolyte ◽  
Asymmetric Supercapacitors ◽  
Corn Flake

A high performance asymmetric supercapacitor was fabricated with an electrodeposited corn flake-like NiO nanostructure, activated carbon, and polymer gel.

Hierarchical three-dimensional mesoporous MnO2 nanostructures for high performance aqueous asymmetric supercapacitors

2016 ◽  
Vol 4 (2) ◽  
pp. 587-595 ◽  
Author(s):  
Sourav Bag ◽  
C. Retna Raj
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors

Nanocrystalline mesoporous α-MnO2 is synthesized for the fabrication of a high energy density aqueous asymmetric supercapacitor device.

Advanced solid-state asymmetric supercapacitors based on 3D graphene/MnO2 and graphene/polypyrrole hybrid architectures

2015 ◽  
Vol 3 (24) ◽  
pp. 12828-12835 ◽  
Author(s):  
Zheye Zhang ◽  
Kai Chi ◽  
Fei Xiao ◽  
Shuai Wang
Keyword(s):  
Solid State ◽  
High Performance ◽  
Nickel Foam ◽  
Asymmetric Supercapacitors ◽  
Hybrid Architectures ◽  
3D Graphene

Two types of 3D architectured electrodes, i.e., graphene wrapped nickel foam Ni/GF/MnO2 and Ni/GF/polypyrrole (PPy), were successfully fabricated for high performance flexible solid-state asymmetric supercapacitors.

Engineering onion-like nanoporous CuCo2O4 hollow spheres derived from bimetal–organic frameworks for high-performance asymmetric supercapacitors

2018 ◽  
Vol 6 (22) ◽  
pp. 10497-10506 ◽  
Author(s):  
Ali A. Ensafi ◽  
Seyyed Ebrahim Moosavifard ◽  
B. Rezaei ◽  
Saeid Kamari Kaverlavani
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Hollow Spheres ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors

An asymmetric supercapacitor fabricated using onion-like nanoporous CuCo2O4 hollow spheres exhibits an energy density of 48.75 W h kg−1 and a power density of 37.5 kW kg−1, which can compete with Ni–MH batteries.

MoO3@Ni nanowire array hierarchical anode for high capacity and superior longevity all-metal-oxide asymmetric supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 110112-110119 ◽  
Author(s):  
Chao Xu ◽  
Jie Liao ◽  
Ruozheng Wang ◽  
Peichao Zou ◽  
Ronghe Wang ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Nanowire Array ◽  
High Capacity ◽  
High Mass ◽  
Asymmetric Supercapacitor ◽  
Mass Loading ◽  
Asymmetric Supercapacitors

An all-metal-oxide asymmetric supercapacitor based on MoO3@Ni nanowire array anode with high mass loading and VO2@NNA nanowire array cathode was constructed, which achieved a real capacity (307 mF cm−2) and cyclability (116.6% capacitance retention after 20 000 cycles).

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