Herein we report the characteristics of a lithium-oxygen battery using a solid polymer membrane as the electrolyte separator. The polymer electrolyte, fully characterized in terms of electrochemical properties, shows suitable conductivity at room temperature allowing the reversible cycling of the Li-O2 battery with a specific capacity as high as 25,000 mAh gC(-1) reflected in a surface capacity of 12.5 mAh cm(-2). The electrochemical formation and dissolution of the lithium peroxide during Li-O2 polymer cell operation is investigated by electrochemical techniques combined with X-ray diffraction study, demonstrating the process reversibility. The excellent cell performances in terms of delivered capacity, in addition to its solid configuration allowing the safe use of lithium metal as high capacity anode, demonstrate the suitability of the polymer lithium-oxygen as high-energy storage system.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4523859 | PMC |
| http://dx.doi.org/10.1038/srep12307 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Aligned Ion Conduction Pathway of Polyrotaxane-Based Electrolyte with Dispersed Hydrophobic Chains for Solid-State Lithium-Oxygen Batteries.
Nanomicro Lett
October 2024
School of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea.
A critical challenge hindering the practical application of lithium-oxygen batteries (LOBs) is the inevitable problems associated with liquid electrolytes, such as evaporation and safety problems. Our study addresses these problems by proposing a modified polyrotaxane (mPR)-based solid polymer electrolyte (SPE) design that simultaneously mitigates solvent-related problems and improves conductivity. mPR-SPE exhibits high ion conductivity (2.
View Article and Find Full Text PDFRobust oxygen adsorbent mediated oxygen redox reactions for high performance lithium-oxygen battery.
J Colloid Interface Sci
January 2025
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, China; State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection, Chengdu University of Technology, Chengdu, China. Electronic address:
Article Synopsis
- Lithium-oxygen batteries (LOBs) are attractive for their high energy density but struggle with slow reaction rates and stability issues due to oxygen electrode reactions.
- The study introduces perfluorooctane (PFO) as an additive in the electrolyte to enhance oxygen transport and improve the reactions on the oxygen electrode.
- The addition of PFO leads to increased oxygen concentration and better electrochemical stability, resulting in improved battery efficiency and longer cycling life.
A High Capacity Gas Diffusion Electrode for Li-O Batteries.
Adv Mater
October 2024
Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, UK.
The very high theoretical specific energy of the lithium-air (Li-O) battery (3500 Wh kg) compared with other batteries makes it potentially attractive, especially for the electrification of flight. While progress has been made in realizing the Li-air battery, several challenges remain. One such challenge is achieving a high capacity to store charge at the positive electrode at practical current densities, without which Li-air batteries will not outperform lithium-ion.
View Article and Find Full Text PDFBinder-Free Three-Dimensional Porous Graphene Cathodes via Self-Assembly for High-Capacity Lithium-Oxygen Batteries.
Nanomaterials (Basel)
April 2024
School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China.
Article Synopsis
- The study focuses on the development of a binder-free three-dimensional (3D) porous graphene (PG) cathode for high-capacity lithium-oxygen batteries, addressing challenges related to traditional polymer binders that block active sites and reduce battery performance.
- The proposed PG cathodes, made through self-assembly and chemical reduction, showcase a remarkable capacity of 10,300 mAh/g, providing improved electrical performance due to their interconnected mesoporous structure.
- Additionally, catalysts such as ruthenium (Ru) and manganese dioxide (MnO) are incorporated to further enhance the cathode's performance by reducing polarization and improving cycling stability.
Electrospinning-assisted porous skeleton electrolytes for semi-solid Li-O batteries.
Chem Commun (Camb)
May 2024
Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2), School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.
Solid-state lithium-oxygen batteries offer great promise in meeting the practical demand for high-energy-density and safe energy storage. We have developed fibrous gel polymer electrolytes (GPEs) using a polyacrylonitrile (PAN) matrix electrospinning. The 3D structure of GPEs enhances electrolyte absorption, while the interconnected design promotes strong interactions between Li and polar groups within the PAN matrix, thereby improving ion transport efficiency.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!