| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Jena, Rajeeb Kumar
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2018Development of a 3D graphene aerogel and 3D porous graphene/MnO 2 @polyaniline hybrid film for all-solid-state flexible asymmetric supercapacitorscitations
- 2017Development of 3D Urchin-Shaped Coaxial Manganese Dioxide@Polyaniline (MnO2@PANI) Composite and Self-Assembled 3D Pillared Graphene Foam for Asymmetric All-Solid-State Flexible Supercapacitor Applicationcitations
- 2015Non-covalent interactions and supercapacitance of pseudo-capacitive composite electrode materials (MWCNT-COOH/MnO2/PANI)citations
- 2015Graphene/heparin template-controlled polyaniline nanofibers composite for high energy density supercapacitor electrodecitations
- 2014Synthesis of graphene/vitamin C template-controlled polyaniline nanotubes composite for high performance supercapacitor electrodecitations
Places of action
| Organizations | Location | People |
|---|
article
Development of 3D Urchin-Shaped Coaxial Manganese Dioxide@Polyaniline (MnO2@PANI) Composite and Self-Assembled 3D Pillared Graphene Foam for Asymmetric All-Solid-State Flexible Supercapacitor Application
Abstract
We have fabricated high-energy-density all-solid-state flexible asymmetric supercapacitor by using a facile novel 3D hollow urchin-shaped coaxial manganese dioxide@polyaniline (MnO<sub>2</sub>@PANI) composite as positive electrode and 3D graphene foam (GF) as negative electrode materials with polyvinyl alcohol (PVA)/KOH gel electrolyte. The coaxial MnO<sub>2</sub>@PANI composite was fabricated by hydrothermal route followed by oxidation without use of an external oxidant. The formation mechanism of the 3D hollow MnO<sub>2</sub>@PANI composite occurs first by nucleation and growth of the MnO<sub>2</sub> crystal species via dissolution-recrystallization and oriented attachment mechanisms followed by the oxidation of aniline monomers on the MnO<sub>2</sub> crystalline template. The self-assembled 3D graphene block was synthesized by hydrothermal route using vitamin C as a reducing agent. The microstructures of the composites are analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The morphology is characterized by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), which clearly showed the formation of urchin-shaped coaxial MnO<sub>2</sub>@PANI composite. The electrochemical studies are explored by cyclic voltammetry, electrochemical impedance spectrometry, and cyclic charge-discharge tests. The symmetric all-solid-state flexible MnO<sub>2</sub>@PANI//MnO<sub>2</sub>@PANI and GF//GF supercapacitors exhibit the specific capacitance of 129.2 and 82.1 F g<sup>-1</sup> at 0.5 A/g current density, respectively. The solid-state asymmetric supercapacitor shows higher energy density (37 Wh kg<sup>-1</sup>) with respect to the solid-state symmetric supercapacitors MnO<sub>2</sub>@PANI//MnO<sub>2</sub>@PANI and GF//GF, where the obtained energy density are found to be 17.9 and 11.4 Wh kg<sup>-1</sup>, respectively, at 0.5 A/g current density. Surprisingly, the asymmetric supercapacitor shows a high energy density of 22.3 Wh kg<sup>-1</sup> at a high current density of 5 A g<sup>-1</sup>. The solid-state asymmetric supercapacitor shows a good cyclic stability in which ∼11% capacitance loss was observed after 5000 cycles. © 2017 American Chemical Society.