Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
8.5
4.4
Journals
Nanomaterials
Special Issues
Nanotechnological Aspects in Materials for Supercapacitors and Batteries
share announcement

Nanotechnological Aspects in Materials for Supercapacitors and Batteries

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (15 April 2023) | Viewed by 12679

Special Issue Editors

Dr. Dawei Su

E-Mail Website
Guest Editor
School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Broadway, NSW 2007, Australia
Interests: energy storage and conversion; functional materials; new-generation battery; organic–inorganic framework
Dr. Tianyi Ma

E-Mail Website
Guest Editor
School of Science, RMIT University, Melbourne, VIC 3000, Australia
Interests: nanofabrication; nanomaterials; photocatalysis; surface engineering; electric vehicle battery; electric power train; autonomous control; ITS networked robotics

Special Issue Information

Dear Colleagues, 

Currently, green energy is becoming increasingly important due to the energy crisis. In the interest of their country’s security, governments worldwide are paying more attention to the development of sustainable green energy strategies than ever before. Energy storage and conversion regarding green energy, such as solar, wind, tidal, etc., and electricity are the most critical aspects to such a big change in the national infrastructure of each country. Though the R&D regarding supercapacitors and batteries has developed fast, many challenges exist in revealing the intrinsic properties of materials for the enhancement of their electrochemical performance. It is crucial to recognize their structure (electronic and morphologic) from their nanotechnological aspects via state-of-the-art characterization techniques.

This Special Issue covers research on the state-of-the-art techniques used in supercapacitors and batteries from the nanotechnological perspective. It aims to reveal the intrinsic mechanisms that have an effect on the electrochemical performances of nanostructured materials and their properties. Submitted work can investigate materials of supercapacitors and batteries either regarding morphology control or electronic structure tuning via experimental studies or theoretical calculations or a combination of these two approaches. Reviews that discuss the nanotechnological aspects of materials for supercapacitors and batteries are also welcomed. This Special Issue targets the use of advancements in techniques to benefit the fast growth of the application of functional nanostructured materials in the energy storage and conversion.

Dr. Dawei Su
Dr. Tianyi Ma
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • functional nanostructured materials
  • electrochemical energy storage
  • supercapacitors
  • batteries
  • theoretical calculations
  • experimental studies

Published Papers (6 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

12 pages, 2393 KiB  
Article
Effect of Electrolyte Concentration on the Electrochemical Performance of Spray Deposited LiFePO4
by Christina Floraki, Maria Androulidaki, Emmanuel Spanakis and Dimitra Vernardou
Nanomaterials 2023, 13(12), 1850; https://doi.org/10.3390/nano13121850 - 13 Jun 2023
Cited by 4 | Viewed by 1411
Abstract
LiFePO4 is a common electrode cathode material that still needs some improvements regarding its electronic conductivity and the synthesis process in order to be easily scalable. In this work, a simple, multiple-pass deposition technique was utilized in which the spray-gun was moved [...] Read more.
LiFePO4 is a common electrode cathode material that still needs some improvements regarding its electronic conductivity and the synthesis process in order to be easily scalable. In this work, a simple, multiple-pass deposition technique was utilized in which the spray-gun was moved across the substrate creating a “wet film”, in which—after thermal annealing at very mild temperatures (i.e., 65 °C)—a LiFePO4 cathode was formed on graphite. The growth of the LiFePO4 layer was confirmed via X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy. The layer was thick, consisting of agglomerated non-uniform flake-like particles with an average diameter of 1.5 to 3 μm. The cathode was tested in different LiOH concentrations of 0.5 M, 1 M, and 2 M, indicating an quasi-rectangular and nearly symmetric shape ascribed to non-faradaic charging processes, with the highest ion transfer for 2 M LiOH (i.e., 6.2 × 10−9 cm2/cm). Nevertheless, the 1 M aqueous LiOH electrolyte presented both satisfactory ion storage and stability. In particular, the diffusion coefficient was estimated to be 5.46 × 10−9 cm2/s, with 12 mAh/g and a 99% capacity retention rate after 100 cycles. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Figure 1

15 pages, 8102 KiB  
Article
Cu@Fe-Redox Capacitive-Based Metal–Organic Framework Film for a High-Performance Supercapacitor Electrode
by Supriya A. Patil, Pranav K. Katkar, Mosab Kaseem, Ghazanfar Nazir, Sang-Wha Lee, Harshada Patil, Honggyun Kim, Verjesh Kumar Magotra, Hoa Bui Thi, Hyunsik Im and Nabeen K. Shrestha
Nanomaterials 2023, 13(10), 1587; https://doi.org/10.3390/nano13101587 - 9 May 2023
Cited by 13 | Viewed by 2469
Abstract
A metal–organic framework (MOF) is a highly porous material with abundant redox capacitive sites for intercalation/de-intercalation of charges and, hence, is considered promising for electrode materials in supercapacitors. In addition, dopants can introduce defects and alter the electronic structure of the MOF, which [...] Read more.
A metal–organic framework (MOF) is a highly porous material with abundant redox capacitive sites for intercalation/de-intercalation of charges and, hence, is considered promising for electrode materials in supercapacitors. In addition, dopants can introduce defects and alter the electronic structure of the MOF, which can affect its surface reactivity and electrochemical properties. Herein, we report a copper-doped iron-based MOF (Cu@Fe-MOF/NF) thin film obtained via a simple drop-cast route on a 3D-nickel foam (NF) substrate for the supercapacitor application. The as-deposited Cu@Fe-MOF/NF electrodes exhibit a unique micro-sized bipyramidal structure composited with nanoparticles, revealing a high specific capacitance of 420.54 F g−1 at 3 A g−1 which is twice compared to the nano-cuboidal Fe-MOF/NF (210 F g−1). Furthermore, the asymmetric solid-state (ASSSC) supercapacitor device, derived from the assembly of Cu@Fe-MOF/NFǁrGO/NF electrodes, demonstrates superior performance in terms of energy density (44.20 Wh.kg−1) and electrochemical charge–discharge cycling durability with 88% capacitance retention after 5000 cycles. This work, thus, demonstrates a high potentiality of the Cu@Fe-MOF/NF film electrodes in electrochemical energy-storing devices. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Figure 1

21 pages, 4110 KiB  
Article
Hierarchical Porous Heteroatoms—Co-Doped Activated Carbon Synthesized from Coconut Shell and Its Application for Supercapacitors
by Rui Liu, Jing-Xuan Wang and Wein-Duo Yang
Nanomaterials 2022, 12(19), 3504; https://doi.org/10.3390/nano12193504 - 7 Oct 2022
Cited by 3 | Viewed by 1819
Abstract
Coconut husk biomass waste was used as the carbon precursor to develop a simple and economical process for the preparation of hierarchical porous activated carbon, and the electrochemical properties of the electrode material were explored. The important process variables of carbonization, the weight [...] Read more.
Coconut husk biomass waste was used as the carbon precursor to develop a simple and economical process for the preparation of hierarchical porous activated carbon, and the electrochemical properties of the electrode material were explored. The important process variables of carbonization, the weight ratios of the coconut shell/KOH, the amount of source dopant, and the carbonization temperature were investigated in order to reveal the influence of the as-obtained microporous/mesoporous/macroporous hierarchical porous carbon materials on the powder properties. Using a BET specific surface area analyzer, Raman analysis, XPS and SEM, surface morphology, pore distribution and specific surface area of the hierarchical porous carbon materials are discussed. The results show that the as-prepared N-, S- and O-heteroatom-co-doped activated carbon electrode was manufactured at 700 °C for electrochemical characteristics. The electrochemical behavior has the characteristics of pseudo-capacitance, and could reach 186 F g−1 at 1 A g−1 when measured by the galvanostatic charge–discharge (GCD) test. After 7000 cycles of the charge–discharge test, the initial capacitance value retention rate was 95.6%. It is predicted that capacitor materials made when using coconut shell as a carbon source will have better energy storage performance than traditional carbon supercapacitors. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Figure 1

13 pages, 2697 KiB  
Article
A New Strategy for Fabricating Well-Distributed Polyaniline/Graphene Composite Fibers toward Flexible High-Performance Supercapacitors
by Yihan Qiu, Xiaoyu Jia, Mei Zhang and Hongwei Li
Nanomaterials 2022, 12(19), 3297; https://doi.org/10.3390/nano12193297 - 22 Sep 2022
Cited by 10 | Viewed by 1507
Abstract
Fiber-shaped supercapacitors are promising and attractive candidates as energy storage devices for flexible and wearable electric products. However, their low energy density (because their microstructure lacks homogeneity and they have few electroactive sites) restricts their development and application. In this study, well-distributed polyaniline/graphene [...] Read more.
Fiber-shaped supercapacitors are promising and attractive candidates as energy storage devices for flexible and wearable electric products. However, their low energy density (because their microstructure lacks homogeneity and they have few electroactive sites) restricts their development and application. In this study, well-distributed polyaniline/graphene composite fibers were successfully fabricated through a new strategy of self-assembly in solution combined with microfluidic techniques. The uniform assembly of polyaniline on graphene oxide sheets at the microscale in a water/N-methyl-2-pyrrolidone blended solvent was accompanied by the in situ reduction of graphene oxides to graphene nanosheets. The assembled fiber-shaped supercapacitors with gel-electrolyte exhibit excellent electrochemical performance, including a large specific areal capacitance of 541.2 mF cm−2, along with a high energy density of 61.9 µW h cm−2 at a power density of 294.1 µW cm−2. Additionally, they can power an electronic device and blue LED lights for several minutes. The enhanced electrochemical performance obtained is mainly attributed to the homogeneous architecture designed, with an increased number of electroactive sites and a synergistic effect between polyaniline and graphene sheets. This research provides an avenue for the synthesis of fiber-shaped electrochemically active electrodes and may promote the development of future wearable electronics. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Figure 1

15 pages, 6351 KiB  
Article
Polymer Nanocomposite Graphene Quantum Dots for High-Efficiency Ultraviolet Photodetector
by Molahalli Vandana, Hundekal Devendrappa, Paola De Padova and Gurumurthy Hegde
Nanomaterials 2022, 12(18), 3175; https://doi.org/10.3390/nano12183175 - 13 Sep 2022
Cited by 6 | Viewed by 2452
Abstract
Influence on photocurrent sensitivity of hydrothermally synthesized electrochemically active graphene quantum dots on conjugated polymer utilized for a novel single-layer device has been performed. Fabrications of high-performance ultraviolet photodetector by depositing the polypyrrole-graphene quantum dots (PPy-GQDs) active layer of the ITO electrode were [...] Read more.
Influence on photocurrent sensitivity of hydrothermally synthesized electrochemically active graphene quantum dots on conjugated polymer utilized for a novel single-layer device has been performed. Fabrications of high-performance ultraviolet photodetector by depositing the polypyrrole-graphene quantum dots (PPy-GQDs) active layer of the ITO electrode were exposed to an Ultraviolet (UV) source with 265 and 355 nm wavelengths for about 200 s, and we examined the time-dependent photoresponse. The excellent performance of GQDs was exploited as a light absorber, acting as an electron donor to improve the carrier concentration. PGC4 exhibits high photoresponsivity up to the 2.33 µA/W at 6 V bias and the photocurrent changes from 2.9 to 18 µA. The electrochemical measurement was studied using an electrochemical workstation. The cyclic voltammetry (CV) results show that the hysteresis loop is optically tunable with a UV light source with 265 and 355 nm at 0.1 to 0.5 V/s. The photocurrent response in PPy-GQDs devices may be applicable to optoelectronics devices. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Graphical abstract

21 pages, 6376 KiB  
Article
Repurposing N-Doped Grape Marc for the Fabrication of Supercapacitors with Theoretical and Machine Learning Models
by Kethaki Wickramaarachchi, Manickam Minakshi, S. Assa Aravindh, Rukshima Dabare, Xiangpeng Gao, Zhong-Tao Jiang and Kok Wai Wong
Nanomaterials 2022, 12(11), 1847; https://doi.org/10.3390/nano12111847 - 27 May 2022
Cited by 25 | Viewed by 2483
Abstract
Porous carbon derived from grape marc (GM) was synthesized via carbonization and chemical activation processes. Extrinsic nitrogen (N)-dopant in GM, activated by KOH, could render its potential use in supercapacitors effective. The effects of chemical activators such as potassium hydroxide (KOH) and zinc [...] Read more.
Porous carbon derived from grape marc (GM) was synthesized via carbonization and chemical activation processes. Extrinsic nitrogen (N)-dopant in GM, activated by KOH, could render its potential use in supercapacitors effective. The effects of chemical activators such as potassium hydroxide (KOH) and zinc chloride (ZnCl2) were studied to compare their activating power toward the development of pore-forming mechanisms in a carbon electrode, making them beneficial for energy storage. GM carbon impregnated with KOH for activation (KAC), along with urea as the N-dopant (KACurea), exhibited better morphology, hierarchical pore structure, and larger surface area (1356 m2 g−1) than the GM carbon activated by ZnCl2 (ZnAC). Moreover, density functional theory (DFT) investigations showed that the presence of N-dopant on a graphite surface enhances the chemisorption of O adsorbates due to the enhanced charge-transfer mechanism. KACurea was tested in three aqueous electrolytes with different ions (LiOH, NaOH, and NaClO4), which delivered higher specific capacitance, with the NaOH electrolyte exhibiting 139 F g−1 at a 2 mA current rate. The NaOH with the alkaline cation Na+ offered the best capacitance among the electrolytes studied. A multilayer perceptron (MLP) model was employed to describe the effects of synthesis conditions and physicochemical and electrochemical parameters to predict the capacitance and power outputs. The proposed MLP showed higher accuracy, with an R2 of 0.98 for capacitance prediction. Full article
(This article belongs to the Special Issue Nanotechnological Aspects in Materials for Supercapacitors and Batteries)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-6
Back to TopTop