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2D Nanomaterials and Composites for Energy and Environmental Sustainability—2nd Edition

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Special Issue Editors

Dr. Luis Alfredo Rodríguez

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Guest Editor

1. Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, A.A, Cali 25360, Colombia
2. Grupo de Transiciones de Fase y Materiales Funcionales, Departamento de Física, Universidad del Valle, A.A, Cali 25360, Colombia
Interests: micro and nanomagnetic materials; micromagnetic simulations; thin films and nanomaterials; hrtem and electron holography; material characterization
Special Issues, Collections and Topics in MDPI journals

Dr. Edgar Mosquera-Vargas

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Guest Editor

1. Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, A.A, Cali 25360, Colombia
2. Grupo de Transiciones de Fase y Materiales Funcionales, Departamento de Física, Universidad del Valle, A.A, Cali 25360, Colombia
Interests: nanomaterials and processes; carbonaceous materials; energy conversion and storage; environmental remediation; materials characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue focuses on theoretical and experimental studies conducted on 2D nanomaterials and composites specially designed for energy and environmental sustainability applications. A large specific surface area with a submicrometer and nanometer thicknesses (2D nanomaterials), and the possibility to combine more than two materials via multilayer architecture or a heterogeneous mixture of particles with micro- and nanometer grain sizes allow these systems to exhibit extraordinary properties, improving those of their constituent materials or inducing multifunctional behavior. With the advantage of relevant properties such as the quantum-size effect, electron confinement, electrical/thermal conductivity and optical transparency, 2D nanomaterials are essential for energy and environmental applications that include H₂ production, CO₂ reduction, supercapacitors, electro- and photo-catalytic devices, solar cells, batteries, membrane separation, advanced oxidation process and water remediation. In the case of composites, their multifunctional character offers the ability to improve specific properties for targeted implementation. Like 2D nanomaterials, composite materials have contributed to improving energy production and storage processes, and they are responsible for the logical circular economy model.

Dr. Luis Alfredo Rodríguez
Dr. Edgar Mosquera-Vargas
Guest Editors

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Published Papers (1 paper)

Research

14 pages, 3659 KiB

Open AccessArticle

Covalent Organic Framework Enhanced Solid Polymer Electrolyte for Lithium Metal Batteries

by Bingyi Ma, Lei Zhong, Sheng Huang, Min Xiao, Shuanjin Wang, Dongmei Han and Yuezhong Meng

Molecules 2024, 29(8), 1759; https://doi.org/10.3390/molecules29081759 - 12 Apr 2024

Viewed by 408

Abstract

High ionic conductivity, outstanding mechanical stability, and a wide electrochemical window are the keys to the application of solid-state lithium metal batteries (LMBs). Due to their regular channels for ion transport and tailored functional groups, covalent organic frameworks (COFs) have been applied to solid electrolytes to improve their performance. Herein, we report a flexible polyethylene oxide-COF-LZU1 (abbreviated as PEO-COF) electrolyte membrane with a high lithium ion transference number and satisfactory mechanical strength, allowing for dendrite-free and long-time cycling for LMBs. Benefiting from the interaction between bis(triflfluoromethanesulonyl)imide anions (TFSI⁻) and aldehyde groups in COF-LZU1, the Li⁺ transference number of the PEO-5% COF-LZU1 electrolyte reached up to 0.43, much higher than that of neat PEO electrolyte (0.18). Orderly channels are conducive to the homogenous Li-⁺ deposition, thereby inhibiting the lithium dendrites. The assembled LiFePO₄|PEO-5% COF-LZU1/Li cells delivered a discharge specific capacity of 146 mAh g⁻¹ and displayed a capacity retention of 80% after 200 cycles at 0.1 C (60 °C). The Li/Li symmetrical cells of the PEO-5% COF-LZU1 electrolyte presented a longer working stability at different current densities compared to that of the PEO electrolyte. Therefore, the enhanced comprehensive performance of the solid electrolyte shows potential application prospects for use in LMBs. Full article

(This article belongs to the Special Issue 2D Nanomaterials and Composites for Energy and Environmental Sustainability—2nd Edition)

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