文章基本信息

标题：A rechargeable Mg|O 2 battery
本地全文：下载
作者：Kok Long Ng ; Kewei Shu ; Gisele Azimi 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：8
页码：1-14
DOI：10.1016/j.isci.2022.104711
语种：English
出版社：Elsevier
摘要：SummaryRechargeable Mg|O2batteries (RMOBs) offer several advantages over alkali metal-based battery systems owing to Mg’s ease of transport/storage in ambient environment, low cost originating from its high abundance, as well as the high theoretical specific energy of RMOBs. However, research on RMOBs has been stagnant for the past decade, largely owing to unacceptably poor electrochemical performance. Here, we present a RMOB that employs Mg anode, Mg((CF3SO2)2N)2-MgCl2in diglyme (G2) electrolyte, and commercial Pt/C on carbon fiber paper (Pt/C@CFP) oxygen cathode. This battery demonstrates unparalleled improvement over existing RMOBs by rendering a discharge capacity over 1.6 mAh cm−2, achieving cycle lives up to 35 cycles with a cumulative energy density of ∼3.2 mWh cm−2at room temperature. This RMOB system seeks to reignite the pursuit of novel electrochemical systems based on Mg-O2chemistries.Graphical abstractDisplay OmittedHighlights•A rechargeable Mg|O2battery with prolonged cycle life (∼35 cycles) is demonstrated•Mg((CF3SO2)2N)2-MgCl2in G2 enables reversible battery cycling O2environment•A multistep discharge product formation pathway is proposed•MgO is identified as the main discharge productElectrochemistry; Materials science; Energy materials