A Hydrothermal Process for the Fabrication of Nickel Foam Based NiO and Co3O4 Nanostructures with Excellent Properties for Electrochemical Capacitors

2013 ◽  
Vol 291-294 ◽  
pp. 786-790
Author(s):  
Ling Bin Kong ◽  
Xiao Ming Li ◽  
Mao Cheng Liu ◽  
Xue Jing Ma ◽  
Yong Chun Luo ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Current Density ◽  
Nickel Foam ◽  
Hydrothermal Process ◽  
Film Structure ◽  
Proton Exchange ◽  
Fast Proton ◽  
Excellent Electrochemical Performance ◽  
Highly Dispersed ◽  
A Current

Unique NiO and Co3O4 nanostructures were successfully deposited on nickel foam (NF) substrate by a hydrothermal process. Both of them are highly dispersed on the surface of NF, showing a unique nanoporous film structure. They exhibit excellent electrochemical performance due to their effective porous structure which introducing facile electrolyte penetration and fast proton exchange. The highest specific capacitance of 231 and 493 F g-1 are achieved for NiO and Co3O4 electrodes at a current density of 0.5 A g-1, respectively.

Co3S4/NiCo2S4 Nano-Arrays on Nickel Foam as Energy Storage for Supercapacitors

2021 ◽  
Vol 16 (6) ◽  
pp. 891-904
Author(s):  
Xiang-Sen Meng ◽  
Jun Xiang ◽  
Nan Bu ◽  
Yan Guo ◽  
Sroeurb Loy ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Current Density ◽  
Retention Rate ◽  
Nickel Foam ◽  
Maximum Energy ◽  
Capacity Retention ◽  
A Current

In this work, Co3S4/NiCo2S4 nano-arrays electrode with Co3S4 nanocones and NiCo2S4 nanosheets interlaced arrangement are prepared by the promising hydrothermal method. Compared with single Co3S4/NF or NiCo2S4/NF electrode, the prepared Co3S4/NiCo2S4/NF electrode exhibits excellent specific capacitance. At a current density of 2 mA cm−2, the surface capacitance is as high as 9036 mF cm−2, and it still maintains a surface capacitance of 5664 mF cm−2 at a current density of 8 mA cm−2. Co3S4/NiCo2S4/NF||ASC has a high electrochemical performance with a maximum energy density of 0.62 Wh cm−3 and a power density of 15.94 W cm−3. At a current density of 5 mA cm−2, the capacity retention rate is 83.75% after 3000 cycles.

scholarly journals A Hierarchical Architecture of Functionalized Polyaniline/Manganese Dioxide Composite with Stable-Enhanced Electrochemical Performance

2021 ◽  
Vol 5 (5) ◽  
pp. 129
Author(s):  
Yapeng Wang ◽  
Yanxiang Wang ◽  
Chengjuan Wang ◽  
Yongbo Wang
Keyword(s):  
Electrochemical Performance ◽  
Manganese Dioxide ◽  
Specific Capacitance ◽  
Current Density ◽  
Electrode Materials ◽  
High Efficiency ◽  
Scanning Speed ◽  
Hierarchical Architecture ◽  
Electrochemical Window ◽  
A Current

As one of the most outstanding high-efficiency and environmentally friendly energy storage devices, the supercapacitor has received extensive attention across the world. As a member of transition metal oxides widely used in electrode materials, manganese dioxide (MnO2) has a huge development potential due to its excellent theoretical capacitance value and large electrochemical window. In this paper, MnO2 was prepared at different temperatures by a liquid phase precipitation method, and polyaniline/manganese dioxide (PANI/MnO2) composite materials were further prepared in a MnO2 suspension. MnO2 and PANI/MnO2 synthesized at a temperature of 40 °C exhibit the best electrochemical performance. The specific capacitance of the sample MnO2-40 is 254.9 F/g at a scanning speed of 5 mV/s and the specific capacitance is 241.6 F/g at a current density of 1 A/g. The specific capacitance value of the sample PANI/MnO2-40 is 323.7 F/g at a scanning speed of 5 mV/s, and the specific capacitance is 291.7 F/g at a current density of 1 A/g, and both of them are higher than the specific capacitance value of MnO2. This is because the δ-MnO2 synthesized at 40 °C has a layered structure, which has a large specific surface area and can accommodate enough electrolyte ions to participate the electrochemical reaction, thus providing sufficient specific capacitance.

Graphene-Wrapped ZnMn2O4 Nanoparticles with Enhanced Performance as Lithium-Ion Battery Anode Materials

NANO ◽  
2020 ◽  
Vol 15 (09) ◽  
pp. 2050117
Author(s):  
Meng Sun ◽  
Sijie Li ◽  
Jiajia Zou ◽  
Zhipeng Cui ◽  
Qingye Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Extraction Process ◽  
Excellent Electrochemical Performance ◽  
Reduced Graphene ◽  
Distinctive Structure ◽  
Enhanced Electrochemical Performance ◽  
A Current

ZnMn2O4 nanoparticles (NPs) wrapped by reduced graphene oxide (rGO) were fabricated via a two-step solvothermal method and used as an anode material for lithium-ion batteries (LIBs). Compared to pure ZnMn2O4, the ZnMn2O4 NPs/rGO composites deliver higher capacities of 1230 mAh g−1 and 578 mAh g−1 after 200 cycles at a current density of 100 mA g−1 and 500 mA g−1, respectively. The enhanced electrochemical performance of ZnMn2O4 NPs/rGO composites is mainly attributed to a distinctive structure (ZnMn2O4 NPs surrounded by flexible rGO), which can promote the diffusion of Li+, accelerate the transport of electrons and buffer volume expansion during the Li+ insertion/extraction process. Furthermore, the rGO sheets can effectively prevent the agglomeration of ZnMn2O4 NPs, thus, improving structural stability of the composites. The excellent electrochemical performance indicates that such ZnMn2O4 NPs/rGO composite structure has a great potential for high-performance LIBs.

Sandwich-like reduced graphene oxide wrapped MOF-derived ZnCo2O4–ZnO–C on nickel foam as anodes for high performance lithium ion batteries

2015 ◽  
Vol 3 (43) ◽  
pp. 21569-21577 ◽  
Author(s):  
Zhaoqiang Li ◽  
Longwei Yin
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Nickel Foam ◽  
Lithium Ion ◽  
Excellent Electrochemical Performance ◽  
Reduced Graphene ◽  
Binder Free

A MOF composite GO/Zn–Co–ZIF/nickel foam derived RGO/ZnCo2O4–ZnO–C/Ni sandwich-like anode exhibits excellent electrochemical performance as a binder-free anode for LIBs.

scholarly journals Sodium Dodecylbenzene Sulfonate Assisted Electrodeposition of MnO2@C Electrode for High Performance Supercapacitor

2021 ◽  
Author(s):  
Yihan Shi ◽  
Ming Zhang ◽  
Junshan Zhao ◽  
Liu Zhang ◽  
Xumei Cui ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Nickel Foam ◽  
Chemical Vapor ◽  
Precursor Solution ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Dodecylbenzene Sulfonate

Abstract In this work, MnO2&SDBS electrodes with nano-honeycomb morphology were prepared by ultrasound-assisted electrochemical deposition using sodium dodecylbenzene sulfonate (SDBS) as a surfactant agent. The effect and mechanism of SDBS on the morphology of MnO2 nanomaterials during the preparation of MnO2 by electrochemical anodic oxidation was systematically investigated by varying the content of SDBS in the precursor solution. When the SDBS concentration is 2 g\bulletL-1, the resulting electrode has the best electrochemical performance, and the specific capacitance is up to 407 F\bulletg-1 at the current density of 1000 mAg-1. To further enhance its performance, a carbon coating layer was deposited on the surface of the electrode using a method similar to chemical vapor deposition. Finally, the MnO2&SDBS@C electrode with a three-dimensional net-to-film composite structure with a high specific surface area, hierarchical structure and interconnect with nickel foam supports were obtained. The electrode has excellent electrochemical performance, and the specific capacitance is still up to 289 Fg-1 at a high current density of 5000 mAg-1. Furthermore, the specific capacitance of the electrode was maintained at 76.7% after 5000 cycles of charging and discharging at a current density of 2000 mAg−1.

A self-supported, three-dimensional porous copper film as a current collector for advanced lithium metal batteries

2019 ◽  
Vol 7 (3) ◽  
pp. 1092-1098 ◽  
Author(s):  
Yujun Shi ◽  
Zhenbin Wang ◽  
Hui Gao ◽  
Jiazheng Niu ◽  
Wensheng Ma ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Three Dimensional ◽  
Copper Film ◽  
Current Collector ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Porous Copper ◽  
Excellent Electrochemical Performance ◽  
Cu Foil ◽  
A Current

3D porous Cu foil fabricated by the painting–alloying–dealloying method exhibits excellent electrochemical performance as a current collector for Li metal batteries.

scholarly journals Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors

2016 ◽  
Vol 4 (23) ◽  
pp. 9113-9123 ◽  
Author(s):  
Shuxing Wu ◽  
K. S. Hui ◽  
K. N. Hui ◽  
Kwang Ho Kim
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Nickel Foam ◽  
Asymmetric Supercapacitors ◽  
Excellent Electrochemical Performance

We report ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode, which exhibits excellent electrochemical performance in supercapacitors.

scholarly journals Facile One-Step Dynamic Hydrothermal Synthesis of Spinel LiMn2O4/Carbon Nanotubes Composite as Cathode Material for Lithium-Ion Batteries

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4123 ◽  
Author(s):  
Chaoqi Shen ◽  
Hui Xu ◽  
Liu Liu ◽  
Heshan Hu ◽  
Siyuan Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Performance ◽  
Retention Rate ◽  
Hydrothermal Process ◽  
Lithium Ion ◽  
Spinel Limn2o4 ◽  
Excellent Electrochemical Performance ◽  
Specific Discharge ◽  
One Step ◽  
Hydrothermal Approach

Nano-sized spinel LiMn2O4/carbon nanotubes (LMO/CNTs) composite is facilely synthesized via a one-step dynamic hydrothermal approach. The characterizations and electrochemical measurements reveal that LiMn2O4 particles with narrow size distribution are well dispersed with CNTs in the composite. The LMO/CNTs nanocomposite with 5 wt % CNTs displays a high specific discharge capacity of 114 mAh g−1 at 1C rate, and the retention rate after 180 cycles at room temperature reaches 94.5% in the potential window of 3.3 to 4.3 V vs. Li/Li+. Furthermore, the electrochemical performance of the composite with 5 wt % CNTs at elevated temperature (55 °C) is also impressive, 90% discharging capacity could be maintained after 100 cycles at 1C. Such excellent electrochemical performance of the final product is attributed to the content of CNTs added in the hydrothermal process and small particle size inherited from pretreated MnO2 precursor.

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