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.

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 High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature

2021 ◽  
Vol 11 (14) ◽  
pp. 6357
Author(s):  
Roberto Luigi Oliveri ◽  
Maria Grazia Insinga ◽  
Simone Pisana ◽  
Bernardo Patella ◽  
Giuseppe Aiello ◽  
...  
Keyword(s):  
High Performance ◽  
Active Material ◽  
Active Surface ◽  
Effect Of Temperature ◽  
Active Surface Area ◽  
Polycarbonate Membrane ◽  
Nanostructured Electrodes ◽  
Lead Acid Batteries ◽  
Improved Stability ◽  
Lead Acid

Lead-acid batteries are now widely used for energy storage, as result of an established and reliable technology. In the last decade, several studies have been carried out to improve the performance of this type of batteries, with the main objective to replace the conventional plates with innovative electrodes with improved stability, increased capacity and a larger active surface. Such studies ultimately aim to improve the kinetics of electrochemical conversion reactions at the electrode-solution interface and to guarantee a good electrical continuity during the repeated charge/discharge cycles. To achieve these objectives, our contribution focuses on the employment of nanostructured electrodes. In particular, we have obtained nanostructured electrodes in Pb and PbO2 through electrosynthesis in a template consisting of a nanoporous polycarbonate membrane. These electrodes are characterized by a wider active surface area, which allows for a better use of the active material, and for a consequent increased specific energy compared to traditional batteries. In this research, the performance of lead-acid batteries with nanostructured electrodes was studied at 10 C at temperatures of 25, −20 and 40 °C in order to evaluate the efficiency and the effect of temperature on electrode morphology. The batteries were assembled using both nanostructured electrodes and an AGM-type separator used in commercial batteries.

Hollow structure engineering of FeCo alloy nanoparticles electrospun in nitrogen-doped carbon enables high performance flexible all-solid-state zinc–air batteries

2020 ◽  
Vol 4 (4) ◽  
pp. 1747-1753 ◽  
Author(s):  
Yuanyuan Ma ◽  
Wenjie Zang ◽  
Afriyanti Sumboja ◽  
Lu Mao ◽  
Ximeng Liu ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Hollow Structure ◽  
Active Surface ◽  
Oxygen Electrode ◽  
Active Surface Area ◽  
Active Components ◽  
Nitrogen Doped Carbon ◽  
Structure Engineering ◽  
Kinetics Of

Hollow structuring of active components is an effective strategy to improve the kinetics of oxygen electrode catalysts, arising from the increased the active surface area, the defects on the exposed surface, and the accessible active sites.

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.

Rational design of La0.85Sr0.15MnO3@NiCo2O4 Core–Shell architecture supported on Ni foam for high performance supercapacitors

2018 ◽  
Vol 402 ◽  
pp. 213-220 ◽  
Author(s):  
Xueqin Lang ◽  
Haifeng Zhang ◽  
Xin Xue ◽  
Chuanlu Li ◽  
Xucong Sun ◽  
...  
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Core Shell ◽  
Ni Foam

Hierarchical FeCo 2 S 4 @FeNi 2 S 4 Core/Shell Nanostructures on Ni Foam for High‐Performance Supercapacitors

2019 ◽  
Vol 25 (62) ◽  
pp. 14117-14122 ◽  
Author(s):  
Yunxia Huang ◽  
Shuaipeng Ge ◽  
Xiaojuan Chen ◽  
Zhongcheng Xiang ◽  
Xinran Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Core Shell ◽  
Ni Foam ◽  
Shell Nanostructures

scholarly journals Design of NiO Flakes@CoMoO4 Nanosheets Core-Shell Architecture on Ni Foam for High-Performance Supercapacitors

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Enmin Zhou ◽  
Liangliang Tian ◽  
Zhengfu Cheng ◽  
Chunping Fu
Keyword(s):  
High Performance ◽  
Core Shell ◽  
Ni Foam

Hierarchical polypyrrole/Ni3S2@MoS2 core–shell nanostructures on a nickel foam for high-performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (72) ◽  
pp. 68460-68467 ◽  
Author(s):  
Jie Gao ◽  
Xiuhua Wang ◽  
Xiuqin Wang ◽  
Ronghui Que ◽  
Yao Fang ◽  
...  
Keyword(s):  
High Performance ◽  
Nickel Foam ◽  
Core Shell ◽  
Solution Synthesis ◽  
Ni Foam ◽  
Shell Nanostructures ◽  
Synthesis Protocol

Hierarchical polypyrrole/Ni3S2@MoS2 core–shell nanostructures have been successfully designed and constructed on a Ni foam substrate through a facile two-step solution synthesis protocol and exhibit high performance as a supercapacitor.

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