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Energies
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Energy Storage and Conversion Based on Low-Dimensional Nanostructure
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Energy Storage and Conversion Based on Low-Dimensional Nanostructure

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: closed (25 April 2022) | Viewed by 5229

Special Issue Editors

Dr. Dan Luo

E-Mail Website
Guest Editor
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
Interests: self-powered nanosystems; nanogenerators; self-assembly; low-dimensional nanomaterials; nanobiotechnology; catalysis; tissue engineering; ultrathin materials; single-atom catalyst; electrocatalysis
Dr. Yujia Lv

E-Mail Website
Guest Editor
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
Interests: semiconductor nanomaterials; fuel cells; bioelectronics
Dr. Shengwei Zhang

E-Mail Website
Guest Editor
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
Interests: nanobubbles and nanodroplets; oilfield chemistry

Special Issue Information

Dear Colleagues,

Nanotechnology covers all aspects of the energy field, from the exploitation of fossil fuel resources to the development of renewable energy. Benefiting from the huge specific surface area and unique atomic structure, nanomaterials play a tremendous role in adsorption, separation, energy conversion, and catalysis. The Special Issue invites papers that not only provide new fabrication strategies for nanomaterials, especially low-dimensional nanomaterials, but also explore their applications in energy storage and conversion. Papers focusing on addressing key issues in the field of nanoenergy are encouraged. Contributions include on a variety of topics such as batteries, self-powered nanodevices, fuel cells, hydrogen generation and storage, supercapacitors, and other related content.

Prof. Dr. Dan Luo
Dr. Yujia Lv
Dr. Shengwei Zhang
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. Energies 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 2600 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

  • Nanostructures
  • Energy storage and conversion
  • Renewable energy
  • Fossil energy

Published Papers (3 papers)

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Research

9 pages, 2197 KiB  
Article
Graphene and Resin Coated Proppant with Electrically Conductive Properties for In-Situ Modification of Shale Oil
by Siyuan Chen, Fanghui Liu, Yang Zhou, Xiuping Lan, Shouzhen Li, Lulu Wang, Quan Xu, Yeqing Li and Yan Jin
Energies 2022, 15(15), 5599; https://0-doi-org.brum.beds.ac.uk/10.3390/en15155599 - 02 Aug 2022
Cited by 1 | Viewed by 1198
Abstract
Proppant is an essential material in hydraulic fracturing, and it can support artificial fractures for a long time. However, few people have applied proppant and conductive materials in the in-situ modification of shale oil. Here, we developed a graphene and resin coated (GRC) [...] Read more.
Proppant is an essential material in hydraulic fracturing, and it can support artificial fractures for a long time. However, few people have applied proppant and conductive materials in the in-situ modification of shale oil. Here, we developed a graphene and resin coated (GRC) proppant with electrically conductive properties. The electrical conductivity of the GRC proppant improved by four orders of magnitude. The GRC proppant has a 54.58% improvement in suspension and 22.75% increase in settlement time at 0.25 wt% concentration compared with uncoated proppant. The GRC proppant’s adhesion reached 68.34 nN under 1 μN load force, increasing by 63.13% compared to uncoated proppant. This new electrically conductive proppant can be used as a conductive carrier to improve the efficiency of electric heating in in-situ modification technology of shale oil. Full article
(This article belongs to the Special Issue Energy Storage and Conversion Based on Low-Dimensional Nanostructure)
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9 pages, 3498 KiB  
Article
Enhanced Photoelectrocatalytic Activity of TiO2 Nanowire Arrays via Copolymerized G-C3N4 Hybridization
by Yajun Wang, Runhua Li, Qiaohuan Wu, Zhuang Yang, Fan Fan, Yuming Li and Guiyuan Jiang
Energies 2022, 15(12), 4180; https://0-doi-org.brum.beds.ac.uk/10.3390/en15124180 - 07 Jun 2022
Cited by 2 | Viewed by 1549
Abstract
Photoelectrocatalytic (PEC) oxidation is an advanced technology that combines photocatalytic oxidation (PC) and electrolytic oxidation (EC). PEC activity can be greatly enhanced by the PC and EC synergy effect. In this work, novel copolymerized g-C3N4 (denoted as CNx)/TiO [...] Read more.
Photoelectrocatalytic (PEC) oxidation is an advanced technology that combines photocatalytic oxidation (PC) and electrolytic oxidation (EC). PEC activity can be greatly enhanced by the PC and EC synergy effect. In this work, novel copolymerized g-C3N4 (denoted as CNx)/TiO2 core-shell nanowire arrays were prepared by chemical vapor deposition. CNx were deposited on the surface of TiO2 nanowire arrays using organic monomer 4,5-dicyanidazole and dicyandiamide as copolymerization precursor. TiO2 nanowire arrays provide a direct and fast electron transfer path, while CNx is a visible light responsive material. After CNx deposition, the light response range of TiO2 is broadened to 600 nm. The deposition of CNx shell effectively improves the PC efficiency and PEC efficiency of TiO2. Under visible light irradiation and 1 V bias potential, the rate constant k of PEC degradation of CNx/TiO2 core-shell nanowire arrays is 0.0069 min−1, which is 72% higher than that of pure TiO2 nanowires. The built-in electric field formed in the interface between TiO2 core and CNx shell would effectively promote photogenerated charge separation and PEC activity. Full article
(This article belongs to the Special Issue Energy Storage and Conversion Based on Low-Dimensional Nanostructure)
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12 pages, 4957 KiB  
Article
In Situ Growth of COF on PAN Nanofibers to Improve Proton Conductivity and Dimensional Stability in Proton Exchange Membranes
by Xiaoyu Meng, Yinan Lv, Jihong Wen, Xiaojing Li, Luman Peng, Chuanbo Cong, Haimu Ye and Qiong Zhou
Energies 2022, 15(9), 3405; https://0-doi-org.brum.beds.ac.uk/10.3390/en15093405 - 06 May 2022
Cited by 2 | Viewed by 1997
Abstract
Perfluorosulfonic acid (PFSA) polymer is considered as a proton exchange membrane material with great potential. Nevertheless, excessive water absorption caused by abundant sulfonic acid groups makes PFSA have low dimensional stabilities. In order to improve the dimensional stability of PFSA membranes, nanofibers are [...] Read more.
Perfluorosulfonic acid (PFSA) polymer is considered as a proton exchange membrane material with great potential. Nevertheless, excessive water absorption caused by abundant sulfonic acid groups makes PFSA have low dimensional stabilities. In order to improve the dimensional stability of PFSA membranes, nanofibers are introduced into PFSA membranes. However, because nanofibers lack proton conducting groups, it usually reduces the proton conductivities of PFSA membranes. It is a challenge to improve dimensional stabilities while maintaining high proton conductivities. Due to the structural designability, covalent organic frameworks (COFs) with proton conductive groups are chosen to improve the overall performance of PFSA membranes. Herein, COFs synthesized in situ on three-dimensional PAN nanofibers were introduced into PFSA to prepare PFSA@PAN/TpPa-SO3H sandwiched membranes. The PFSA@PAN/TpPa-SO3H-5 composite membrane exhibited outstanding proton conductivity, which reached 260.81 mS·cm−1 at 80 °C and 100% RH, and only decreased by 4.7% in 264 h. The power density of a single fuel cell with PFSA@PAN/TpPa-SO3H-5 was as high as 392.7 mW·cm−2. Compared with the pristine PFSA membrane, the conductivity of PFSA@PAN/TpPa-SO3H-5 increased by 70.0 mS·cm−1, and the area swelling ratio decreased by 8.1%. Our work provides a novel strategy to prepare continuous proton transport channels to simultaneously improve conductivities and dimensional stabilities of proton exchange membranes. Full article
(This article belongs to the Special Issue Energy Storage and Conversion Based on Low-Dimensional Nanostructure)
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