Effective 3D open-channel nanostructures of a MgMn2O4 positive electrode for rechargeable Mg batteries operated at room temperature was written by Sone, Kazuki;Hayashi, Yoshihiro;Mandai, Toshihiko;Yagi, Shunsuke;Oaki, Yuya;Imai, Hiroaki. And the article was included in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2021.COA of Formula: C8H18O4 This article mentions the following:
Room-temperature operations of rechargeable Mg coin-cell batteries have been achieved using a Mg alloy neg. electrode and a spinel MgMn2O4 (MMO)-pos. electrode. The present work focuses on clarifying the effects of the physiochem. properties of the MMO powder including the sp. surface area (SBET) and porosity of the pos. electrode on Mg battery performances in practical applications. Finally, optimal sp. surface area and porosity parameters were obtained that ensured excellent battery performances as a standard coin-cell at room temperature A typical MMO powder synthesized using a modified sol-gel method with propylene oxide-driven complex polymerization had a large SBET > 200 m2 g-1, and more than 90% porosity with a triple-tiered 3D open-channel network. Here we evaluated the discharge capacity and the cyclability for room-temperature operation as a function of SBET in a full cell with a Mg neg. electrode as well as half cells with a carbon graphite electrode. Irresp. of whether half cells or a full cell was used, the initial discharge capacity was found to depend linearly on the SBET of the porous MMO powder in a Mg tetrakis(hexafluoroisopropyl)borate/triglyme electrolyte with a wide potential window, ΔE > 3.6 V. Eventually, the maximum discharge capacity of 220 mA h g-1 was realized at 25°C in the full cell using the 3D open-channel nanostructure with SBET = 236 m2 g-1. The cyclability in the full cell with the Mg alloy neg. electrode, however, degraded with the increasing SBET, while no cyclability degradation was observed in the half cell with the carbon electrode. A possible mechanism is discussed regarding passivation of the Mg alloy electrode in discharge/charge cycles. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2COA of Formula: C8H18O4).
2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. But on the other hand, ethers undergo cleavage by reaction with acids. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).COA of Formula: C8H18O4
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem