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Nanomaterials
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Nanomaterials for Electrochemical Energy Storage and Conversion Applications
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Nanomaterials for Electrochemical Energy Storage and Conversion Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 3475

Special Issue Editor

Dr. Hyung Mo Jeong

E-Mail Website
Guest Editor
School of Mechanical Engineering and Department of Smart Fab. Technology, Sungkyunkwan University, Seoul, Korea
Interests: Rational design of materials and manufacturing technologies: Low dimensional carbon materials, Nanocrystalline metal oxide, and Porous Metal-organic Frameworks; Development of energy & environmental systems; Electrochemical applications (Devices): (1) Supercapactiors, (2) Secondary-ion Batteries, (3) Metal-air batteries, (4) Smart Windows; Environmental electrochemical applications: Electro-catalyst for carbon dioxide reduction

Special Issue Information

Dear Colleagues,

Developing abundant, active, and stable materials for renewable energy storage and conversion by electrochemical reactions is highly demanded over the past few decades. A remarkable improvement in performances of electrochemical energy storage devices and environmental electrochemical applications has been achieved through recent advances in inorganic and organic based nanomaterials. Especially, structural and chemical properties of nanomaterials are treated as design factors to realize a high performance with improved electrochemical properties (e.g. high specific capacities, rate capabilities, reducing the kinetic imbalances of electrodes from different reaction mechanisms, and high catalytic activities with desired products selectivity)

The aim of this Special Issue is to report recent advancements in nanoscience and nanotechnology leading to the new generation of electrochemical energy storage and conversion system. It is envisaged that this will cover a wide range of nanomaterials for electrochemical energy applications, including energy storage devices (Li-ion, Na-ion, Li-S, Li-metal, Li-O batteries, electrochemical capacitors, and asymmetric hybrid capacitors) and environmental energy conversion (electrocatalysts for hydrogen/oxygen production and electrocatalysts for electrochemical carbon dioxide reduction toward valuable chemicals production).

Dr. Hyung Mo Jeong
Guest Editor

Manuscript Submission Information

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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 2400 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

  • nanomaterials
  • electrodes
  • anodes
  • cathodes
  • electrocatalysts
  • batteries
  • supercapactiros
  • nanoparticles
  • nanostructures
  • energy devices

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Published Papers (3 papers)

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Research

18 pages, 5379 KiB  
Article
Rationally Designed Bimetallic Co–Ni Sulfide Microspheres as High-Performance Battery-Type Electrode for Hybrid Supercapacitors
by John Anthuvan Rajesh, Jong-Young Park, Ramu Manikandan and Kwang-Soon Ahn
Nanomaterials 2022, 12(24), 4435; https://doi.org/10.3390/nano12244435 - 13 Dec 2022
Cited by 11 | Viewed by 1816
Abstract
Rational designing of electrode materials is of great interest for improving the performance of battery-type supercapacitors. The bimetallic NiCo2S4 (NCS) and CoNi2S4 (CNS) electrode materials have received much attention for supercapacitors due to their rich electrochemical characteristics. [...] Read more.
Rational designing of electrode materials is of great interest for improving the performance of battery-type supercapacitors. The bimetallic NiCo2S4 (NCS) and CoNi2S4 (CNS) electrode materials have received much attention for supercapacitors due to their rich electrochemical characteristics. However, the comparative electrochemical performances of NCS and CNS electrodes were never studied for supercapacitor application. In this work, microsphere-like bimetallic NCS and CNS structures were synthesized via a facile one-step hydrothermal method by controlling the molar ratio of Ni and Co precursors. The physico-chemical results confirmed that microsphere-like structures with cubic spinel-type NCS and CNS materials were successfully fabricated by this method. When tested as the supercapacitor electrode materials, both NCS and CNS electrodes exhibited battery-type behavior in a three-electrode configuration with outstanding electrochemical performances such as specific capacity, rate performance and cycle stability. Impressively, the CNS electrode delivered a high specific capacity of 430.1 C g−1 at 1 A g−1, which is higher than 345.9 C g−1 of the NCS electrode. Furthermore, the NCS and CNS electrodes showed a decent cycling stability with 75.70 and 84.70% capacity retention after 10,000 cycles. Benefiting from the electrochemical advantage of CNS microspheres, we fabricated a hybrid supercapacitor (HSC) device based on CNS microspheres (positive electrode) and activated carbon (AC, negative electrode), which is named as CNS//AC. The assembled CNS//AC HSC device showed a large energy density of 41.98 Wh kg−1 at a power density of 800.04 W kg−1 and displayed a remarkable cycling stability with a capacity retention of 91.79% after 15,000 cycles. These excellent electrochemical performances demonstrate that both bimetallic NCS and CNS microspheres may provide potential electrode materials for high performance battery-type supercapacitors. Full article
(This article belongs to the Special Issue Nanomaterials for Electrochemical Energy Storage and Conversion Applications)
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10 pages, 2169 KiB  
Article
Molybdenum Carbide Anchored on N,S Co-Doped Carbon Composite Derived from Lignosulfonate as a High Performance Electrocatalyst for Hydrogen Evolution Reaction
by Na Yeong Oh, So Young Park, Ji Young Hwang, Hyung Mo Jeong, Yong Sik Kim and Duck Hyun Youn
Nanomaterials 2022, 12(17), 3047; https://doi.org/10.3390/nano12173047 - 2 Sep 2022
Cited by 4 | Viewed by 1985
Abstract
A composite of Mo2C nanoparticles dispersed onto a nitrogen and sulfur co-doped carbon scaffold (Mo2C/N,S-C) was prepared by a simple and environmentally friendly method of one-pot annealing of MoCl5, urea, and lignosulfonate under a N2 atmosphere [...] Read more.
A composite of Mo2C nanoparticles dispersed onto a nitrogen and sulfur co-doped carbon scaffold (Mo2C/N,S-C) was prepared by a simple and environmentally friendly method of one-pot annealing of MoCl5, urea, and lignosulfonate under a N2 atmosphere at 700 °C. Lignosulfonate, a by-product of the sulfite pulping process, was employed as a feedstock to fabricate the S-doped carbon scaffold and carbide simultaneously, and urea acted as a nitrogen source for N-doping to carbon. The as-prepared Mo2C/N,S-C catalyst showed high performance for the hydrogen evolution reaction (HER), with a small overpotential of 105 mV at 10 mAcm−2, and good stability for 3000 cycles. The improved HER performance of the Mo2C/N,S-C originated from the interplay between the highly active Mo2C nanoparticles and the N,S co-doped carbon scaffold with its high electrical conductivity and large surface area. Furthermore, N,S co-doping to carbon improved the hydrophilicity of the catalyst surface, thus further enhancing the HER activity. Full article
(This article belongs to the Special Issue Nanomaterials for Electrochemical Energy Storage and Conversion Applications)
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13 pages, 1451 KiB  
Article
Efficient Electrocatalyst Nanoparticles from Upcycled Class II Capacitors
by Junhua Xu, Daobin Liu, Carmen Lee, Pierre Feydi, Marlene Chapuis, Jing Yu, Emmanuel Billy, Qingyu Yan and Jean-Christophe P. Gabriel
Nanomaterials 2022, 12(15), 2697; https://doi.org/10.3390/nano12152697 - 5 Aug 2022
Cited by 6 | Viewed by 2623
Abstract
To move away from fossil fuels, the electrochemical reaction plays a critical role in renewable energy sources and devices. The anodic oxygen evolution reaction (OER) is always coupled with these reactions in devices but suffers from large energy barriers. Thus, it is important [...] Read more.
To move away from fossil fuels, the electrochemical reaction plays a critical role in renewable energy sources and devices. The anodic oxygen evolution reaction (OER) is always coupled with these reactions in devices but suffers from large energy barriers. Thus, it is important for developing efficient OER catalysts with low overpotential. On the other hand, there are large amounts of metals in electronic waste (E-waste), especially various transition metals that are promising alternatives for catalyzing OER. Hence, this work, which focuses on upcycling Class II BaTiO3 Multilayer Ceramic Capacitors, of which two trillion were produced in 2011 alone. We achieved this by first using a green solvent extraction method that combined the ionic liquid Aliquat® 336 and hydrochloride acid to recover a mixed solution of Ni, Fe and Cu cations, and then using such a solution to synthesize high potential catalysts NiFe hydroxide and NiCu hydroxide for OER. NiFe-hydroxide has been demonstrated to have faster OER kinetics than the NiCu-hydroxide and commercial c-RuO2. In addition, it showed promising results after the chronopotentiometry tests that outperform c-RuO2. Full article
(This article belongs to the Special Issue Nanomaterials for Electrochemical Energy Storage and Conversion Applications)
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