Large-scale mechanical preparation of graphene containing nickel, nitrogen and oxygen dopants as supercapacitor electrode material

2021 ◽  
pp. 132815
Author(s):  
Liangyu Liu ◽  
Zhengjie Xie ◽  
Xiaomin Du ◽  
Deyang Yu ◽  
Bin Yang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Large Scale ◽  
Supercapacitor Electrode ◽  
Mechanical Preparation

scholarly journals A vanadium-based oxide-phosphate-pyrophosphate framework as a 4 V electrode material for K-ion batteries

2021 ◽  
Author(s):  
Mirai Ohara ◽  
A. Shahul Hameed ◽  
Kei Kubota ◽  
Akihiro Katogi ◽  
Kuniko Chihara ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrode Material ◽  
Large Scale ◽  
Electrode Materials ◽  
Electrical Energy ◽  
Positive Electrode ◽  
Electrical Energy Storage ◽  
Positive Electrode Materials

K-ion batteries (KIBs) are promising for large-scale electrical energy storage owing to the abundant resources and the electrochemical specificity of potassium. Among the positive electrode materials for KIBs, vanadium-based polyanionic...

Fabrication and charge storage capacitance of PPY/TiO2/PPY jacket nanotube array

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yibing Xie
Keyword(s):  
Density Of States ◽  
Electrode Material ◽  
Acidic Solution ◽  
Tube Wall ◽  
Internal Surface ◽  
Experimental Result ◽  
Charge Storage ◽  
Current Response ◽  
Supercapacitor Electrode ◽  
Nanotube Array

AbstractA PPY/TiO2/PPY jacket nanotube array was fabricated by coating PPY layer on the external and internal surface of a tube wall-separated TiO2 nanotube array. It shows coaxial triple-walled nanotube structure with two PPY nanotube layers sandwiching one TiO2 nanotube layer. PPY/TiO2/PPY reveals much higher current response than TiO2. The theoretical calculation indicates PPY/TiO2/PPY reveals higher density of states and lower band gap, accordingly presenting higher conductivity and electroactivity, which is consistent with the experimental result of a higher current response. The electroactivity is highly enhanced in H2SO4 rather than Na2SO4 electrolyte due to feasible pronation process of PPY in an acidic solution. PPY/TiO2/PPY could conduct the redox reaction in H2SO4 electrolyte which involves the reversible protonation/deprotonation and HSO4− doping/dedoping process and accordingly contributes to Faradaic pseudocapacitance. The specific capacitance is highly enhanced from 1.7 mF cm−2 of TiO2 to 123.4 mF cm−2 of PPY/TiO2/PPY at 0.1 mA cm−2 in H2SO4 electrolyte. The capacitance also declines from 123.4 to 31.7 mF cm−2 when the current density increases from 0.1 to 1 mA cm−2, presenting the rate capacitance retention of 26.7% due to the semiconductivity of TiO2. A PPY/TiO2/PPY jacket nanotube with high charge storage capacitance is regarded as a promising supercapacitor electrode material.

MOF/PEDOT/HPMo-based polycomponent hierarchical hollow micro-vesicles for high performance flexible supercapacitors

2021 ◽  
Vol 9 (5) ◽  
pp. 2948-2958
Author(s):  
Bing Wang ◽  
Shuo Liu ◽  
Lin Liu ◽  
Wen-Wei Song ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Cycle Stability ◽  
Supercapacitor Electrode ◽  
Flexible Supercapacitors ◽  
High Area

The three-component PCN-224/PEDOT/PMo12 supercapacitor electrode material is designed to offer high area capacitance, good cycle stability and mechanical flexibility.

Highly ordered mesoporous phenol–formaldehyde carbon as supercapacitor electrode material

2013 ◽  
Vol 231 ◽  
pp. 197-202 ◽  
Author(s):  
Tingwei Cai ◽  
Min Zhou ◽  
Dayong Ren ◽  
Guangshuai Han ◽  
Shiyou Guan
Keyword(s):  
Electrode Material ◽  
Phenol Formaldehyde ◽  
Supercapacitor Electrode ◽  
Ordered Mesoporous

Polypyrrole/cellulose nanofiber aerogel as a supercapacitor electrode material

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 109143-109149 ◽  
Author(s):  
Qingyuan Niu ◽  
Yaqing Guo ◽  
Kezheng Gao ◽  
Ziqiang Shao
Keyword(s):  
Electrochemical Performance ◽  
Electrode Material ◽  
Cellulose Nanofiber ◽  
Supercapacitor Electrode ◽  
Microscopic Morphology

CIT-Fe3+ colloid can effectively control over the microscopic morphology of the PPy/CNFs aerogel, which exhibited good electrochemical performance.

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.

Tetragonal CoMn2O4 nanocrystals on electrospun carbon fibers as a high–performance battery–type supercapacitor electrode material

2021 ◽  
Author(s):  
Daniel M. Mijailovic ◽  
Vuk V. Radmilović ◽  
Uros C. Lacnjevac ◽  
Dusica B Stojanovic ◽  
Karen Bustillo ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Electrode Material ◽  
High Performance ◽  
Redox Activity ◽  
Composite Fibers ◽  
Supercapacitor Electrode ◽  
Step Procedure

We herein report a simple two–step procedure for fabricating tetragonal CoMn2O4 spinel nanocrystals on carbon fibers. The battery–type behavior of these composite fibers arises from the redox activity of CoMn2O4...

Synthesis of Graphene Nanoplatelets/Polythiophene as a High Performance Supercapacitor Electrode Material

2021 ◽  
Author(s):  
Yaseen Muhammad ◽  
Ata ur Rahman ◽  
Hamsa Noreen ◽  
Zeeshan Nawaz ◽  
Javed Iqbal Saggu ◽  
...  
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Graphene Nanoplatelets ◽  
Supercapacitor Electrode ◽  
High Capacitance

The preparation of a stable, efficient, inexpensive and high capacitance electrode material for supercapacitors is posing great challenges for the researchers. In this report, we demonstrate the synthesis of stable,...

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