A Stable Lithium–Oxygen Battery Electrolyte Based on Fully Methylated Cyclic Ether
Citations Over TimeTop 10% of 2018 papers
Abstract
Ether-based electrolytes are commonly used in Li-O2 batteries (LOBs) because of their relatively high stability. But they are still prone to be attacked by superoxides or singlet oxygen via hydrogen abstract reactions, which leads to performance decaying during long-term operation. Herein we propose a methylated cyclic ether, 2,2,4,4,5,5-hexamethyl-1,3-dioxolane (HMD), as a stable electrolyte solvent for LOBs. Such a compound does not contain any hydrogen atoms on the alpha-carbon of the ether, and thus avoids hydrogen abstraction reactions. As the result, this solvent exhibits excellent stability with the presence of superoxide or singlet oxygen. In addition the CO2 evolution during charge process is prohibited. The LOB with HMD-based electrolyte was able to run up to 157 cycles, 4 times more than with 1,3-dioxolane (DOL) or 1,2-dimethoxyethane (DME) based electrolytes.
Related Papers
- → A chemically stable electrolyte with a novel sandwiched structure for proton-conducting solid oxide fuel cells (SOFCs)(2013)26 cited
- → LiAlCl4·3SO2: a promising inorganic electrolyte for stable Li metal anode at room and low temperature(2019)14 cited
- → Effect of VC additive on MFA-based electrolyte in Li-ion batteries(2013)17 cited
- → Electrolyte Development for High-Performance Li-Ion Cells: Additives, Solvents, and Agreement with a Generalized Molecular Model(2019)17 cited
- → Anti-cognition in lithium-ion battery electrolytes: Comparable performance with degraded electrolyte(2020)8 cited