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Polymers
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Polymers for Electronic Energy Storage Applications
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Polymers for Electronic Energy Storage Applications

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 6721

Special Issue Editor

Dr. Kewei Shu

E-Mail Website
Guest Editor
Xi’an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xuefu Road, Weiyang District, Xi’an 710021, China
Interests: polymer for energy storage; functional polymer composites; conducting polymers

Special Issue Information

Dear Colleagues,

Due to their numerous advantages, including their low cost, easy processability, and structure tunability, polymeric materials have been widely applied to all aspects of energy storage applications. Generally, researchers focus on these specific fields and beyond: (1) developing redox-active polymers for advanced electrode materials for rechargeable ion batteries because of their structural diversity and flexibility, surface functionalities and tenability, and low cost; (2) enhancing the ionic conductivity of polymer solid or gel electrolytes while maintaining mechanical properties; (3) optimizing the polymer binder which affects the bonding between components, as well as mechanical properties and electrochemical performance of the electrode; (4) improving mechanical robustness, regulating ion and mass transport, and retarding flammability for polymer-based battery separators.

This Special Issue in Polymers aims to collect original research papers, review papers, or short communications that discuss related aspects in the field of polymeric electrodes, electrolytes, separators for supercapacitors, batteries, fuel cells, etc.

Dr. Kewei Shu
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. Polymers 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 2700 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

  • polymer electrode
  • polymer electrolyte
  • binder
  • separator
  • energy storage devices

Published Papers (3 papers)

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Research

13 pages, 3823 KiB  
Article
A PVDF/g−C3N4-Based Composite Polymer Electrolytes for Sodium-Ion Battery
by Kewei Shu, Jiazhen Zhou, Xiaojing Wu, Xuan Liu, Liyu Sun, Yu Wang, Siyu Tian, Huizhu Niu, Yihao Duan, Guangyu Hu and Haihua Wang
Polymers 2023, 15(9), 2006; https://doi.org/10.3390/polym15092006 - 24 Apr 2023
Cited by 1 | Viewed by 2089
Abstract
As one of the most promising candidates for all-solid-state sodium-ion batteries and sodium-metal batteries, polyvinylidene difluoride (PVDF) and amorphous hexafluoropropylene (HFP) copolymerized polymer solid electrolytes still suffer from a relatively low room temperature ionic conductivity. To modify the properties of PVDF-HEP copolymer electrolytes, [...] Read more.
As one of the most promising candidates for all-solid-state sodium-ion batteries and sodium-metal batteries, polyvinylidene difluoride (PVDF) and amorphous hexafluoropropylene (HFP) copolymerized polymer solid electrolytes still suffer from a relatively low room temperature ionic conductivity. To modify the properties of PVDF-HEP copolymer electrolytes, we introduce the graphitic C3N4 (g−C3N4) nanosheets as a novel nanofiller to form g−C3N4 composite solid polymer electrolytes (CSPEs). The analysis shows that the g−C3N4 filler can not only modify the structure in g−C3N4CSPEs by reducing the crystallinity, compared to the PVDF−HFP solid polymer electrolytes (SPEs), but also promote a further dissociation with the sodium salt through interaction between the surface atoms of the g−C3N4 and the sodium salt. As a result, enhanced electrical properties such as ionic conductivity, Na+ transference number, mechanical properties and thermal stability of the composite electrolyte can be observed. In particular, a low Na deposition/dissolution overpotential of about 100 mV at a current density of 1 mA cm−2 was found after 160 cycles with the incorporation of g−C3N4. By applying the g−C3N4 CSPEs in the sodium-metal battery with Na3V2(PO4)3 cathode, the coin cell battery exhibits a lower polarization voltage at 90 mV, and a stable reversible capacity of 93 mAh g−1 after 200 cycles at 1 C. Full article
(This article belongs to the Special Issue Polymers for Electronic Energy Storage Applications)
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17 pages, 8205 KiB  
Article
Enhanced Electrochemical Performance of PEO-Based Composite Polymer Electrolyte with Single-Ion Conducting Polymer Grafted SiO2 Nanoparticles
by Xuan Liu, Wanning Mao, Jie Gong, Haiyu Liu, Yanming Shao, Liyu Sun, Haihua Wang and Chao Wang
Polymers 2023, 15(2), 394; https://doi.org/10.3390/polym15020394 - 11 Jan 2023
Cited by 4 | Viewed by 2067
Abstract
In order to enhance the electrochemical performance and mechanical properties of poly(ethylene oxide) (PEO)-based solid polymer electrolytes, composite solid electrolytes (CSE) composed of single-ion conducting polymer-modified SiO2, PEO and lithium salt were prepared and used in lithium-ion batteries in this work. [...] Read more.
In order to enhance the electrochemical performance and mechanical properties of poly(ethylene oxide) (PEO)-based solid polymer electrolytes, composite solid electrolytes (CSE) composed of single-ion conducting polymer-modified SiO2, PEO and lithium salt were prepared and used in lithium-ion batteries in this work. The pyridyl disulfide terminated polymer (py-ss-PLiSSPSI) is synthesized through RAFT polymerization, then grafted onto SiO2 via thiol-disulfide exchange reaction between SiO2-SH and py-ss-PLiSSPSI. The chemical structure, surface morphology and elemental distribution of the as-prepared polymer and the PLiSSPSI-g-SiO2 nanoparticles have been investigated. Moreover, CSEs containing 2, 6, and 10 wt% PLiSSPSI-g-SiO2 nanoparticles (PLi-g-SiCSEs) are fabricated and characterized. The compatibility of the PLiSSPSI-g-SiO2 nanoparticles and the PEO can be effectively improved owing to the excellent dispersibility of the functionalized nanoparticles in the polymer matrix, which promotes the comprehensive performances of PLi-g-SiCSEs. The PLi-g-SiCSE-6 exhibits the highest ionic conductivity (0.22 mS·cm−1) at 60 °C, a large tLi+ of 0.77, a wider electrochemical window of 5.6 V and a rather good lithium plating/stripping performance at 60 °C, as well as superior mechanical properties. Hence, the CSEs containing single-ion conducting polymer modified nanoparticles are promising candidates for all-solid-state lithium-ion batteries. Full article
(This article belongs to the Special Issue Polymers for Electronic Energy Storage Applications)
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11 pages, 2294 KiB  
Article
Graphene Composite via Bacterial Cellulose Assisted Liquid Phase Exfoliation for Sodium-Ion Batteries
by Kewei Shu, Siyu Tian, Yu Wang, Guiqiang Fei, Liyu Sun, Huizhu Niu, Yihao Duan, Guangyu Hu and Haihua Wang
Polymers 2023, 15(1), 203; https://doi.org/10.3390/polym15010203 - 31 Dec 2022
Cited by 2 | Viewed by 2067
Abstract
One of the most critical challenges for commercialization of sodium-ion battery (SIB) is to develop carbon anodes with high capacity and good rate performance. Graphene would be an excellent SIB anode candidate due to its success in various kinds of batteries. Liquid-phase exfoliation [...] Read more.
One of the most critical challenges for commercialization of sodium-ion battery (SIB) is to develop carbon anodes with high capacity and good rate performance. Graphene would be an excellent SIB anode candidate due to its success in various kinds of batteries. Liquid-phase exfoliation (LPE) method is an inexpensive, facile and potentially scalable method to produce less-defected graphene sheets. In this work, we developed an improved, dispersant-assisted LPE method to produce graphene composite materials from raw graphite with high yield and better quality for SIB anode. Here, bacterial cellulose (BC) was used as a green dispersant/stabilizer for LPE, a “spacer” for anti-restacking, as well as a carbon precursor in the composite. As a result, the carbonized BC (CBC)/LPE graphene (LEGr) presented improved performance compared to composite with graphene prepared by Hummers method. It exhibited a specific capacity of 233 mAh g−1 at a current density of 20 mA g−1, and 157 mAh g−1 after 200 cycles at a high current density of 100 mA g−1 with capacity retention rate of 87.73%. This method not only provides new insight in graphene composites preparation, but also takes a new step in the exploration of anode materials for sodium-ion batteriesSIBs. Full article
(This article belongs to the Special Issue Polymers for Electronic Energy Storage Applications)
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