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Nanomaterials
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Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications
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Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications

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

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 11287

Special Issue Editors

Prof. Dr. Jeng-Yu Lin

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Guest Editor
Department of Chemical and Materials Engineering, Tunghai University, Taichung City, Taiwan
Interests: Li/Na ion batteries; supercapacitors; perovskite/dye-sensitized solar cells; electrocatalysts; electrochemical sensors
Special Issues, Collections and Topics in MDPI journals
Dr. Min-Hsin Yeh

E-Mail Website
Guest Editor
Department of Chemical Engineering, National Taiwan University of Science and Technology (Taiwan Tech), Taipei, Taiwan
Interests: nanomaterials; electrocatalysts; photovoltaics; energy materials; triboelectric nanogenerators; self-powered electrochemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Tzu-Ho Wu

E-Mail Website
Guest Editor
Department of Chemical & Materials Engineering, National Yunlin University of Science and Technology, Douliou, Taiwan
Interests: electrochemical energy storage; electrochemical spectroscopic analysis; nanomaterial design
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Owing to the extensive consumption of the limited natural fossil fuels in the past decades, the sustainable development of green renewable energy sources (e.g., solar, wind, and hydraulic power) is quite urgent and necessary. In addition to the green renewable energy sources, the development of efficient and cost-effective energy storage devices is essential for the reliable transmission and distribution of electrical energy sources to the demands for varieties of applications. Especially, the electrochemical energy storage/conversion devices, including the primary batteries (such as zinc-manganese batteries, etc.), secondary batteries (such as lead-acid batteries, nickel-hydrogen batteries, lithium/sodium/zinc-ion batteries, etc.), fuel cells, metal-air batteries, super capacitors, etc. have been undergoing rapid expansion and dominating the varieties of power sources.

Until now, transition metal-based nanomaterials (TMNs) including transition metal oxides, nitrides, carbides, sulfides and selenides have been of interest for such devices due to their eco-friendliness, highly electrocatalytic activity, significantly enhanced kinetics, and so on. In this special issue, we will focus on the rational design of nanomaterials to efficiently address the current challenges of electrochemical energy storage/conversion devices. Particularly, the investigation of fundamental aspects and design concept of TMNs on their electrochemical properties in energy storage/conversion devices are preferred. Additionally, both review and original articles are welcome for submission.

Prof. Dr. Jeng-Yu Lin
Dr. Min-Hsin Yeh
Dr. Tzu-Ho Wu
Guest Editor

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

  • Nanomaterials
  • Li/Na/Zn-ion batteries
  • Supercapcitors
  • Fuel cells
  • Electrocatalysts

Published Papers (5 papers)

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Research

9 pages, 2704 KiB  
Article
Lithium Vanadium Oxide/Graphene Composite as a Promising Anode for Lithium-Ion Batteries
by Leichao Meng, Jianhong Peng, Yi Zhang, Yongfu Cui, Lingyun An, Peng Chen and Fan Zhang
Nanomaterials 2023, 13(1), 43; https://0-doi-org.brum.beds.ac.uk/10.3390/nano13010043 - 22 Dec 2022
Cited by 7 | Viewed by 1811
Abstract
Lithium vanadium oxide (Li3VO4, LVO) is a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity (394 mAh g−1) and safe working potential (0.5–1.0 V vs. Li+/Li). However, its electrical conductivity [...] Read more.
Lithium vanadium oxide (Li3VO4, LVO) is a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity (394 mAh g−1) and safe working potential (0.5–1.0 V vs. Li+/Li). However, its electrical conductivity is low which leads to poor electrochemical performance. Graphene (GN) shows excellent electrical conductivity and high specific surface area, holding great promise in improving the electrochemical performance of electrode materials for LIBs. In this paper, LVO was prepared by different methods. SEM results showed the obtained LVO by sol-gel method possesses uniform nanoparticle morphology. Next, LVO/GN composite was synthesized by sol-gel method. The flexible GN could improve the distribution of LVO, forming a high conductive network. Thus, the LVO/GN composite showed outstanding cycling performance and rate performance. The LVO/GN composite can provide a high initial capacity of 350.2 mAh g−1 at 0.5 C. After 200 cycles, the capacity of LVO/GN composite remains 86.8%. When the current density increased from 0.2 C to 2 C, the capacity of LVO/GN composite only reduced from 360.4 mAh g−1 to 250.4 mAh g−1, demonstrating an excellent performance rate. Full article
(This article belongs to the Special Issue Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications)
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14 pages, 3681 KiB  
Article
Nanoflower-like P-doped Nickel Oxide as a Catalytic Counter Electrode for Dye-Sensitized Solar Cells
by Yi-Lin Chen, Yi-June Huang, Min-Hsin Yeh, Miao-Syuan Fan, Cheng-Tai Lin, Ching-Cheng Chang, Vittal Ramamurthy and Kuo-Chuan Ho
Nanomaterials 2022, 12(22), 4036; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12224036 - 17 Nov 2022
Cited by 3 | Viewed by 1463
Abstract
Flower-like phosphorus-doped nickel oxide (P-NiO) is proposed as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). The flower-like nickel oxide essentially serves as the matrix for the CE, which is expected to promote a two-dimensional electron transport pathway. The phosphorus is intended [...] Read more.
Flower-like phosphorus-doped nickel oxide (P-NiO) is proposed as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). The flower-like nickel oxide essentially serves as the matrix for the CE, which is expected to promote a two-dimensional electron transport pathway. The phosphorus is intended to improve the catalytic ability by creating more active sites in the NiO for the catalysis of triiodide ions (I3−) to iodide ions (I−) on the surface of the CE. The P-NiO is controlled by a sequencing of precursor concentration, which allows the P-NiO to possess different features. The debris aggregation occurs in the P-NiO-1, while the P-NiO-0.75 leads to the incomplete flower-like nanosheets. The complete flower-like morphology can be observed in the P-NiO-0.5, P-NiO-0.25 and P-NiO-0.1 catalytic electrodes. The DSSC with the P-NiO-0.5 CE achieves a power conversion efficiency (η) of 9.05%, which is better than that of the DSSC using a Pt CE (η = 8.51%); it also performs better than that with the Pt CE, even under rear illumination and dim light conditions. The results indicate the promising potential of the P-NiO CE to replace the expensive Pt CE. Full article
(This article belongs to the Special Issue Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications)
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16 pages, 19455 KiB  
Article
Stabilizing Li-Rich Layered Cathode Materials Using a LiCoMnO4 Spinel Nanolayer for Li-Ion Batteries
by Hsiu-Fen Lin, Si-Ting Cheng, De-Zhen Chen, Nian-Ying Wu, Zong-Xiao Jiang and Chun-Ting Chang
Nanomaterials 2022, 12(19), 3425; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12193425 - 29 Sep 2022
Viewed by 1636
Abstract
Lithium–rich cathodes have excess lithium in the transition metal layer and exhibit an extremely high specific capacity and good energy density. However, they still have some disadvantages. Here, we propose LiCoMnO4, a new nanolayer coating material with a spinel structure, to [...] Read more.
Lithium–rich cathodes have excess lithium in the transition metal layer and exhibit an extremely high specific capacity and good energy density. However, they still have some disadvantages. Here, we propose LiCoMnO4, a new nanolayer coating material with a spinel structure, to modify the surface of lithium cathode oxide (Li7/6Mn1/2Ni1/6Co1/6O2) with a layered structure. The designed cathode with nanolayer spinel coating delivers an excellent reversible capacity, outstanding rate capability, and superior cycling ability whilst exhibiting discharge capacities of 300, 275, 220, and 166 mAh g−1 at rates of 0.1 C at 2.0−4.8 V formation and 0.1, 1, and 5 C, respectively, between 2.0 and 4.6 V. The cycling ability and voltage fading at a high operational voltage of 4.9 V were also investigated, with results showing that the nanolayer spinel coating can depress the surface of the lithium cathode oxide layer, leading to phase transformation that enhances the electrochemical performance. Full article
(This article belongs to the Special Issue Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications)
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11 pages, 2525 KiB  
Article
Two-Dimensional Core-Shell Structure of Cobalt-Doped@MnO2 Nanosheets Grown on Nickel Foam as a Binder-Free Battery-Type Electrode for Supercapacitor Application
by Md Moniruzzaman, Yedluri Anil Kumar, Mohan Reddy Pallavolu, Hammad Mueen Arbi, Salem Alzahmi and Ihab M. Obaidat
Nanomaterials 2022, 12(18), 3187; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12183187 - 14 Sep 2022
Cited by 74 | Viewed by 2962
Abstract
Herein, we present an interfacial engineering strategy to construct an efficient hydrothermal approach by in situ growing cobalt-doped@MnO2 nanocomposite on highly conductive nickel foam (Ni foam) for supercapacitors (SCs). The remarkably high specific surface area of Co dopant provides a larger contacting [...] Read more.
Herein, we present an interfacial engineering strategy to construct an efficient hydrothermal approach by in situ growing cobalt-doped@MnO2 nanocomposite on highly conductive nickel foam (Ni foam) for supercapacitors (SCs). The remarkably high specific surface area of Co dopant provides a larger contacting area for MnO2. In the meantime, the excellent retentions of the hierarchical phase-based pore architecture of the cobalt-doped surface could beneficially condense the electron transportation pathways. In addition, the nickel foam (Ni foam) nanosheets provide charge-transport channels that lead to the outstanding improved electrochemical activities of cobalt-doped@MnO2. The unique cobalt-doped@MnO2 nanocomposite electrode facilitates stable electrochemical architecture, multi-active electrochemical sites, and rapid electro-transports channels; which act as a key factor in enhancing the specific capacitances, stability, and rate capacities. As a result, the cobalt-doped@MnO2 nanocomposite electrode delivered superior electrochemical activities with a specific capacitance of 337.8 F g–1 at 0.5 A g–1; this is greater than pristine MnO2 (277.9 F g–1). The results demonstrate a worthy approach for the designing of high-performance SCs by the grouping of the nanostructured dopant material and metal oxides. Full article
(This article belongs to the Special Issue Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications)
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14 pages, 4606 KiB  
Article
Self-Supported Co3O4@Mo-Co3O4 Needle-like Nanosheet Heterostructured Architectures of Battery-Type Electrodes for High-Performance Asymmetric Supercapacitors
by Yedluri Anil Kumar, Himadri Tanaya Das, Phaneendra Reddy Guddeti, Ramesh Reddy Nallapureddy, Mohan Reddy Pallavolu, Salem Alzahmi and Ihab M. Obaidat
Nanomaterials 2022, 12(14), 2330; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12142330 - 07 Jul 2022
Cited by 46 | Viewed by 2539
Abstract
Herein, this report uses Co3O4 nanoneedles to decorate Mo-Co3O4 nanosheets over Ni foam, which were fabricated by the hydrothermal route, in order to create a supercapacitor material which is compared with its counterparts. The surface morphology of [...] Read more.
Herein, this report uses Co3O4 nanoneedles to decorate Mo-Co3O4 nanosheets over Ni foam, which were fabricated by the hydrothermal route, in order to create a supercapacitor material which is compared with its counterparts. The surface morphology of the developed material was investigated through scanning electron microscopy and the structural properties were evaluated using XRD. The charging storage activities of the electrode materials were evaluated mainly by cyclic voltammetry and galvanostatic charge-discharge investigations. In comparison to binary metal oxides, the specific capacities for the composite Co3O4@Mo-Co3O4 nanosheets and Co3O4 nano-needles were calculated to be 814, and 615 C g−1 at a current density of 1 A g−1, respectively. The electrode of the composite Co3O4@Mo-Co3O4 nanosheets displayed superior stability during 4000 cycles, with a capacity of around 90%. The asymmetric Co3O4@Mo-Co3O4//AC device achieved a maximum specific energy of 51.35 Wh Kg−1 and power density of 790 W kg−1. The Co3O4@Mo-Co3O4//AC device capacity decreased by only 12.1% after 4000 long GCD cycles, which is considerably higher than that of similar electrodes. All these results reveal that the Co3O4@Mo-Co3O4 nanocomposite is a very promising electrode material and a stabled supercapacitor. Full article
(This article belongs to the Special Issue Transition Metal-Based Nanomaterials for Electrochemical Energy Conversion/Storage Applications)
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