Hierarchical core–shell structures of P-Ni(OH)2 rods@MnO2 nanosheets as high-performance cathode materials for asymmetric supercapacitors

Nanoscale ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 2524-2532 ◽  
Author(s):  
Kunzhen Li ◽  
Shikuo Li ◽  
Fangzhi Huang ◽  
Xin-yao Yu ◽  
Yan Lu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Power ◽  
High Performance ◽  
Shell Structures ◽  
Core Shell ◽  
Ni Foam ◽  
Asymmetric Supercapacitors ◽  
Mno2 Nanosheets ◽  
Binder Free ◽  
Power And Energy

The unique P-Ni(OH)2@MnO2 core–shell nanoarrays heterostructure grown on Ni foam were designed and synthesized as a binder-free electrode, high power and energy density asymmetrical supercapacitors were achieved.

scholarly journals Advanced binder-free electrodes based on CoMn2O4@Co3O4 core/shell nanostructures for high-performance supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (55) ◽  
pp. 31594-31602 ◽  
Author(s):  
Xiaobo Chen ◽  
Xiao Liu ◽  
Yongxu Liu ◽  
Yameng Zhu ◽  
Guoce Zhuang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Core Shell ◽  
Ni Foam ◽  
Asymmetric Supercapacitors ◽  
Shell Nanostructures ◽  
Binder Free

CoMn2O4@Co3O4 core/shell arrays on Ni foam exhibit outstanding electrochemical performance for asymmetric supercapacitors with respect to high specific capacitance and high cycling stability.

Synthesis of NiCo2O4@MnO2 Core–Shell Arrays for High Performance Energy Storage

2020 ◽  
Vol 15 (2) ◽  
pp. 171-178
Author(s):  
Rongda Zhao ◽  
Jinqiu Dai ◽  
Fufa Wu
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Single Phase ◽  
Active Surface ◽  
Core Shell ◽  
Active Surface Area ◽  
Ni Foam ◽  
Power And Energy ◽  
New Generation ◽  
A Current

Smooth NiCo2O4 nanowire@MnO2 nanosheet structure arrays grown on the surface of Ni foam base is synthesized via a simple two-step hydrothermal method. As-synthetic NiCo2O4@MnO2 electrode material shows higher performance of electrochemistry than single-phase NiCo2O4 and MnO2, which presents area capacitance of 877.4 C cm–2 at a current density 1 mA cm–2. This wonderful property could be associated with special core–shell structure, which possesses opening appearance with large active surface area and fabulous approaches of the electrolyte immersion and ion transmission. Further, the as-assembling device with a working voltage window of 1.5 V shows a highest energy density value of 0.64 Wh cm–3 and a highest power density value of 7.47 W cm–3. The device displays long-cycle stability with 75% increased of initial capacity after 8000 cycles. Providing a material used for the new-generation device for energy storing and high power and energy density with long life.

Synthesis of hierarchical Ni3S2@NiMoO4 core-shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors

2021 ◽  
Vol 44 ◽  
pp. 103459
Author(s):  
Zhengjie Xie ◽  
Dianfeng Dai ◽  
Ying Xue ◽  
Yixin Li ◽  
Liangyu Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Core Shell ◽  
Ni Foam ◽  
Asymmetric Supercapacitors ◽  
Nanosheet Arrays

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.

Advanced asymmetric supercapacitors based on CNT@Ni(OH)2 core–shell composites and 3D graphene networks

2015 ◽  
Vol 3 (38) ◽  
pp. 19545-19555 ◽  
Author(s):  
Huan Yi ◽  
Huanwen Wang ◽  
Yuting Jing ◽  
Tianquan Peng ◽  
Yiran Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Nickel Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
High Power Density ◽  
Asymmetric Supercapacitors ◽  
3D Graphene

Asymmetric supercapacitors with CNT@nickel hydroxide nanosheet composites and 3-D graphene networks demonstrated a high energy density (∼44.0 W h kg−1) and high power density (∼16 kW kg−1) in aqueous KOH electrolyte.

scholarly journals High performance asymmetric supercapacitors with ultrahigh energy density based on hierarchical carbon nanotubes@NiO core–shell nanosheets and defect-introduced graphene sheets with hole structure

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7843-7856 ◽  
Author(s):  
Zenghui Qiu ◽  
Dawei He ◽  
Yongsheng Wang ◽  
Xuan Zhao ◽  
Wen Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Density ◽  
High Performance ◽  
Cost Effective ◽  
Graphene Sheets ◽  
Core Shell ◽  
Ultrahigh Energy ◽  
Asymmetric Supercapacitors ◽  
Hierarchical Carbon ◽  
Hole Structure

In this work, we report a fast and cost-effective cobalt catalyzed gasification strategy to obtain defect-introduced graphene sheets (DGNs) with hole structure.

Hierarchical 3D NiFe2O4@MnO2 core–shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors

2018 ◽  
Vol 47 (7) ◽  
pp. 2266-2273 ◽  
Author(s):  
Xinyang Zhang ◽  
Ziqing Zhang ◽  
Shuanggan Sun ◽  
Qiushi Sun ◽  
Xiaoyang Liu
Keyword(s):  
Electrochemical Performance ◽  
Hydrothermal Method ◽  
High Performance ◽  
Core Shell ◽  
Ni Foam ◽  
Asymmetric Supercapacitors ◽  
Nanosheet Arrays

Hierarchical NiFe2O4@MnO2 core–shell nanosheet arrays synthesized via a two-step hydrothermal method with successive annealing exhibited outstanding electrochemical performance.

Asymmetric Supercapacitors Based on Graphene/MnO2 and Activated Carbon Nanofiber Electrodes with High Power and Energy Density

2011 ◽  
Vol 21 (12) ◽  
pp. 2366-2375 ◽  
Author(s):  
Zhuangjun Fan ◽  
Jun Yan ◽  
Tong Wei ◽  
Linjie Zhi ◽  
Guoqing Ning ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
High Power ◽  
Carbon Nanofiber ◽  
Asymmetric Supercapacitors ◽  
Power And Energy
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