Manganese silicate drapes as a novel electrode material for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105771-105779 ◽  
Author(s):  
Hong-Yan Wang ◽  
Yue-Ya Wang ◽  
Xue Bai ◽  
Huan Yang ◽  
Jian-Ping Han ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Rate Performance ◽  
Hydrothermal Time ◽  
Manganese Silicate

Manganese silicate drapes (hydrothermal time of 3 h) exhibit high specific capacitance and excellent rate performance.

Remarkable capacitive behavior of a Co3O4–polyindole composite as electrode material for supercapacitor applications

2015 ◽  
Vol 3 (48) ◽  
pp. 24338-24348 ◽  
Author(s):  
R. Pavul Raj ◽  
P. Ragupathy ◽  
S. Mohan
Keyword(s):  
Synergistic Effect ◽  
Specific Capacitance ◽  
Electrode Material ◽  
Composite Electrode ◽  
High Specific Capacitance ◽  
Single Step ◽  
Rate Performance ◽  
Capacitive Behavior ◽  
Supercapacitor Applications

A single step synthesized Co3O4–polyindole composite electrode exhibits high specific capacitance, rate performance and cyclability. This enhanced electrochemical supercapacitive behavior is mainly attributed to the synergistic effect between Co3O4 and polyindole.

scholarly journals Synthesis and Kinetic Analysis of «-MnO2 Nanowires for Supercapacitor Electrode

2021 ◽  
Vol 16 (2) ◽  
pp. 149-156
Author(s):  
Jiaojiao Li ◽  
Wenyao Li ◽  
Liping Huang ◽  
Caiyu Ma ◽  
Jingjing Liu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Kinetic Analysis ◽  
Specific Capacitance ◽  
Electrochemical Property ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Rate Performance ◽  
Supercapacitor Electrode ◽  
Diffusion Controlled ◽  
Mno2 Nanowires

As the electrode material of supercapacitor, MnO2 materials have attracted extensive concern and its electrochemical performance has been continuously optimized, but the kinetic analysis is rarely discussed. Herein, a-MnO2 nanowires with a uniform morphology were synthesized by hydrothermal method, which exhibits proven electrochemical property like outstanding circulation stability, demonstrated rate performance and high specific capacitance. In addition, diffusion-controlled Faradaic procedure and surface capacitance action were calculated and analyzed in detail.

scholarly journals Fabrication of Hierarchical NiMoO4/NiMoO4 Nanoflowers on Highly Conductive Flexible Nickel Foam Substrate as a Capacitive Electrode Material for Supercapacitors with Enhanced Electrochemical Performance

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1143 ◽  
Author(s):  
Anil Yedluri ◽  
Tarugu Anitha ◽  
Hee-Je Kim
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
High Performance ◽  
Nickel Foam ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Charge Discharge

Hierarchical NiMoO4/NiMoO4 nanoflowers were fabricated on highly conductive flexible nickel foam (NF) substrates using a facile hydrothermal method to achieve rapid charge-discharge ability, high energy density, long cycling lifespan, and higher flexibility for high-performance supercapacitor electrode materials. The synthesized composite electrode material, NF/NiMoO4/NiMoO4 with a nanoball-like NF/NiMoO4 structure on a NiMoO4 surface over a NF substrate, formed a three-dimensional interconnected porous network for high-performance electrodes. The novel NF/NiMoO4/NiMoO4 nanoflowers not only enhanced the large surface area and increased the electrochemical activity, but also provided an enhanced rapid ion diffusion path and reduced the charge transfer resistance of the entire electrode effectively. The NF/NiMoO4/NiMoO4 composite exhibited significantly improved supercapacitor performance in terms of a sustained cycling life, high specific capacitance, rapid charge-discharge capability, high energy density, and good rate capability. Electrochemical analysis of the NF/NiMoO4/NiMoO4 nanoflowers fabricated on the NF substrate revealed ultra-high electrochemical performance with a high specific capacitance of 2121 F g−1 at 12 mA g−1 in a 3 M KOH electrolyte and 98.7% capacitance retention after 3000 cycles at 14 mA g−1. This performance was superior to the NF/NiMoO4 nanoball electrode (1672 F g−1 at 12 mA g−1 and capacitance retention 93.4% cycles). Most importantly, the SC (NF/NiMoO4/NiMoO4) device displayed a maximum energy density of 47.13 W h kg−1, which was significantly higher than that of NF/NiMoO4 (37.1 W h kg−1). Overall, the NF/NiMoO4/NiMoO4 composite is a suitable material for supercapacitor applications.

Ultrathin Nanosheets-Assembled Nickel-Based Metal-Organic Framework Microflowers for Supercapacitor Application

2022 ◽  
Author(s):  
Chong-Huan Wang ◽  
Da-Wei Zhang ◽  
Shude Liu ◽  
Yusuke Yamauchi ◽  
Fei-Bao Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
Metal Organic Framework ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Supercapacitor Application ◽  
Ultrathin Nanosheets ◽  
Metal Organic ◽  
Organic Framework

Herein, we propose a solvent-assisted approach for preparing Ni-MOF microflowers with high specific capacitance and excellent rate capability as an electrode material for supercapacitors. Such high electrochemical performance is attributed...

Modified polyacrylonitrile-based activated carbon fibers applied in supercapacitor

2016 ◽  
Vol 45 (3) ◽  
pp. 164-171 ◽  
Author(s):  
Linjie Su ◽  
Bohong Li ◽  
Dongyu Zhao ◽  
Chuanli Qin ◽  
Zheng Jin
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Specific Capacitance ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Fibers ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Activated Carbon Fibers ◽  
Content Type

Purpose The purpose of this paper is to prepare a new modified activated carbon fibers (ACFs) of high specific capacitance used for electrode material of supercapacitor. Design/methodology/approach In this study, the specific capacitance of ACF was significantly increased by using the phenolic resin microspheres and melamine as modifiers to prepare modified PAN-based activated carbon fibers (MACFs) via electrospinning, pre-oxidation and carbonization. The symmetrical supercapacitor (using MACF as electrode) and hybrid supercapacitor (using MACF and activated carbon as electrodes) were tested in term of electrochemical properties by cyclic voltammetry, AC impedance and cycle stability test. Findings It was found that the specific capacitance value of the modified fibers were increased to 167 Fg-1 by adding modifiers (i.e. 20 wt.% microspheres and 15 wt.% melamine) compared to that of unmodified fibers (86.17 Fg-1). Specific capacitance of modified electrode material had little degradation over 10,000 cycles. This result can be attributed to that the modifiers embedded into the fibers changed the original morphology and enhanced the specific surface area of the fibers. Originality/value The modified ACFs in our study had high specific surface area and significantly high specific capacitance, which can be applied as efficient and environmental absorbent, and advanced electrode material of supercapacitor.

Flower-like ZnO@MnCo2O4 nanosheet structures on nickel foam as novel electrode material for high-performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 102961-102967 ◽  
Author(s):  
Chandu V. V. M. Gopi ◽  
Mallineni Venkata-Haritha ◽  
Soo-Kyoung Kim ◽  
Kandasamy Prabakar ◽  
Hee-Je Kim
Keyword(s):  
Specific Capacitance ◽  
Electrode Material ◽  
High Performance ◽  
Nickel Foam ◽  
High Specific Capacitance

The flower-like ZnO@MnCo2O4 nanosheet electrode exhibited high specific capacitance than dandelion-like MnCo2O4.

scholarly journals Hierarchical S-doped porous carbon derived from by-product lignin for high-performance supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (20) ◽  
pp. 12089-12097 ◽  
Author(s):  
Jingyang Tian ◽  
Zhangming Liu ◽  
Zhenghui Li ◽  
Wenguang Wang ◽  
Haiyan Zhang
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Rate Performance

The S-PC-L-900 exhibits a high specific capacitance and excellent rate performance.

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