Improving cyclic stability of polyaniline by thermal crosslinking as electrode material for supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 78545-78552 ◽  
Author(s):  
Xue Wang ◽  
Dong Liu ◽  
Jinxing Deng ◽  
Xiaojuan Duan ◽  
Jinshan Guo ◽  
...  
Keyword(s):  
Electrode Material ◽  
Discharge Process ◽  
Cyclic Stability ◽  
Volume Changes ◽  
The Poor ◽  
Thermal Crosslinking ◽  
Charge Discharge

The poor cyclic stability of polyaniline restricts its application as an electrode material for supercapacitors, due to the volume changes during the long charge/discharge process.

Nitride MXenes as sulfur hosts for thermodynamic and kinetic suppression of polysulfide shuttling: a computational study

2021 ◽  
Author(s):  
Ke Fan ◽  
Yiran Ying ◽  
Xin Luo ◽  
Haitao Huang
Keyword(s):  
Computational Study ◽  
Discharge Process ◽  
Practical Applications ◽  
The Poor ◽  
Sulfur Hosts ◽  
Lithium Sulfur ◽  
Charge Discharge

The practical applications of lithium-sulfur (Li–S) batteries are greatly hindered by the poor conductivity of sulfur, the shuttling of lithium polysulfides (LiPSs), and the sluggish kinetics in charge-discharge process. In...

Organic positive-electrode material utilizing both an anion and cation: a benzoquinone-tetrathiafulvalene triad molecule, Q-TTF-Q, for rechargeable Li, Na, and K batteries

2019 ◽  
Vol 43 (3) ◽  
pp. 1626-1631 ◽  
Author(s):  
Minami Kato ◽  
Titus Masese ◽  
Masaru Yao ◽  
Nobuhiko Takeichi ◽  
Tetsu Kiyobayashi
Keyword(s):  
Energy Density ◽  
Electrode Material ◽  
High Energy ◽  
Rechargeable Batteries ◽  
Positive Electrode ◽  
Design Concept ◽  
High Energy Density ◽  
Discharge Process ◽  
Positive Electrode Material ◽  
Charge Discharge

This study highlights the design concept of a positive electrode material which can accommodate both cations and anions during the charge/discharge process for realizing high energy density rechargeable batteries.

Recycling of Waste Toner and its Electrochemical Performances for Supercapacitor

2014 ◽  
Vol 675-677 ◽  
pp. 689-692
Author(s):  
Ji Qing Mao ◽  
Yang Li
Keyword(s):  
Heat Treatment ◽  
Cyclic Voltammetry ◽  
Electrode Material ◽  
Active Material ◽  
Electrochemical Performances ◽  
Discharge Process ◽  
Oxide Structure ◽  
Resource Recycling ◽  
Potential Alternative ◽  
Charge Discharge

Utilization of the waste toner in wasted print cartridge was beneficial to the environmental protection and resource recycling. Fe3O4 has been obtained from the waste toner via magnetic separation and heat-treatment in present study. XRD measurement revealed the recuperated sample has ferriferrous oxide structure without other crystalline impurity. The electrochemical performances of recuperated Fe3O4, as the electrode active material for supercapacitor, was conducted by cyclic voltammetry and charge-discharge process. The results showed that the specific capacitance of Fe3O4 achieved 76.5 F/g under 50 mA/g current density, which possessed typical capacitive behaviors and good cycling stabilities. Based on the preferable electrochemical performances, Fe3O4 recovered from waste toner may be a potential alternative as electrode material for supercapacitor.

Single atom catalysts supported on N-doped graphene toward fast kinetic Li−S batteries: a theoretical study

2021 ◽  
Author(s):  
Xu Han ◽  
Zeyun Zhang ◽  
Xuefei Xu
Keyword(s):  
Theoretical Study ◽  
Single Atom ◽  
Discharge Process ◽  
Fast Kinetics ◽  
Shuttle Effect ◽  
Sufficient Stability ◽  
Doped Graphene ◽  
Fast Kinetic ◽  
Kinetics Of ◽  
Charge Discharge

To suppress the shuttle effect of lithium polysulfides and promote fast kinetics of charge−discharge process in Li−S batteries, it is essential to search promising catalysts with sufficient stability and high...

A facile synthetic protocol of α-Fe2O3@FeS2 nanocrystals for advanced electrochemical capacitors

CrystEngComm ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 2432-2438 ◽  
Author(s):  
Qing Xia ◽  
Tong Xia ◽  
Meizhen Dai ◽  
Xiang Wu ◽  
Yufeng Zhao
Keyword(s):  
Charge Transfer ◽  
Electrode Material ◽  
Electrochemical Capacitors ◽  
Cyclic Stability ◽  
Hydrothermal Route ◽  
One Pot

In this work, we report granular α-Fe2O3@FeS2 nanocrystals by a one-pot hydrothermal route. The as-obtained product as an electrode material shows excellent charge transfer ability and cyclic stability.

scholarly journals dual-ion charge-discharge behaviors of Na-NiNc and NiNc-NiNc batteries

2021 ◽  
Author(s):  
Jinkwang Hwang ◽  
Rika Hagiwara ◽  
Hiroshi Shinokubo ◽  
Ji-Young Shin
Keyword(s):  
Discharge Capacity ◽  
Electrode Material ◽  
High Stability ◽  
Coulombic Efficiency ◽  
Active Electrode ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Charge Discharge ◽  
High Coulombic Efficiency

Dual-ion sodium-organic secondary batteries were provided with antiaromatic porphyrinoid, NiNc as an active electrode material, which implemented inherent charge-discharge behaviors with high discharge capacity, high stability, high Coulombic efficiency with...

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.

Preparation and Electrochemical Properties of LaMnO3 Powder as a Supercapacitor Electrode Material

2017 ◽  
Vol 727 ◽  
pp. 698-704 ◽  
Author(s):  
Xian Wei Wang ◽  
Xiao Er Wang ◽  
Hui Chao Zhang ◽  
Qian Qian Zhu ◽  
Dong Li Zheng ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Raw Materials ◽  
Sol Gel ◽  
Galvanostatic Charge ◽  
Supercapacitor Electrode ◽  
Lanthanum Manganate ◽  
Pure Phase ◽  
Charge Discharge

The structural and electrochemical properties of lanthanum manganate (LaMnO3) powder prepared by the sol-gel method are researched in this article. The powder calcined at 600 °C showed amorphous, and the powder calcined at 700-800 °C showed the pure phase of the LaMnO3. The grains with the size of about 80-120 nm were agglomerating together. Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical properties in alkaline environment. The electrochemical properties calcined at 700 °C showed a specific capacitance of 73 F/g at the current density of 0.5 A/g. The raw materials for preparing the LaMnO3 powder are cheap, and the operation method is simple.

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