{"title":"Unveiling reaction mechanisms of non-aqueous aprotic Zn-ion batteries – Zn/LiFePO4 system","authors":"Karthik kumar Chinnakutti, Sasisiri Sinthong, Hongyi Gao, Nuria Tapia-Ruiz, Pinit Kidkhunthod, Jitti Kasemchainan","doi":"10.1016/j.jallcom.2024.177279","DOIUrl":null,"url":null,"abstract":"Zinc-ion batteries (ZIBs) have recently gained significant attention as a supplementary option to lithium-ion batteries with the frequent use of MnO<sub>2</sub> as the positive active material and aqueous solution as the electrolyte. Exploration of a non-aqueous electrolyte of Zn(OTf)<sub>2</sub> – LiCl in tetraethylene glycol dimethyl ether (TEGDME) and a positive active material of lithium iron phosphate (LiFePO<sub>4</sub> or LFP) to be into ZIBs is proposed alternatively. TEGDME, also known as tetraglyme, is better than water because it has a high boiling point (> 250 °C at the ambient condition). This implies that ZIBs can be used in high-temperature applications, especially for large-scale energy storage with solar panels. The experimental findings indicate that the electrolyte exhibited enhanced the cycleability, demonstrating a capacity of LFP about 118.8 mAh g<sup>-1</sup> when subjected to a current density of 10<!-- --> <!-- -->mA<!-- --> <!-- -->g<sup>-1</sup>. Furthermore, we measured the specific capacity of the LFP to be 108.15 mAh g<sup>-1</sup> after undergoing 100 cycles. We examined the working mechanism of a LFP/Zn battery in details using XANES and XRD and found that Li<sup>+</sup> is only extracted from/inserted into the cathode during cycling. The findings indicate that the utilization of this non-aqueous high-boiling-point electrolyte has the potential to enhance electrochemical properties, simultaneously prolonging capacity retention.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2024.177279","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Zinc-ion batteries (ZIBs) have recently gained significant attention as a supplementary option to lithium-ion batteries with the frequent use of MnO2 as the positive active material and aqueous solution as the electrolyte. Exploration of a non-aqueous electrolyte of Zn(OTf)2 – LiCl in tetraethylene glycol dimethyl ether (TEGDME) and a positive active material of lithium iron phosphate (LiFePO4 or LFP) to be into ZIBs is proposed alternatively. TEGDME, also known as tetraglyme, is better than water because it has a high boiling point (> 250 °C at the ambient condition). This implies that ZIBs can be used in high-temperature applications, especially for large-scale energy storage with solar panels. The experimental findings indicate that the electrolyte exhibited enhanced the cycleability, demonstrating a capacity of LFP about 118.8 mAh g-1 when subjected to a current density of 10 mA g-1. Furthermore, we measured the specific capacity of the LFP to be 108.15 mAh g-1 after undergoing 100 cycles. We examined the working mechanism of a LFP/Zn battery in details using XANES and XRD and found that Li+ is only extracted from/inserted into the cathode during cycling. The findings indicate that the utilization of this non-aqueous high-boiling-point electrolyte has the potential to enhance electrochemical properties, simultaneously prolonging capacity retention.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.