[Nano Letters] 我室孙世刚教授和乔羽教授发表论文:Nonvolatile and Nonflammable Sulfolane-Based Electrolyte Achieving Effective and Safe Operation of the Li–O2 Battery in Open O2 Environment

发布日期:2022年03月01日   浏览次数:

我室孙世刚教授和乔羽教授在 Nano Letters 上发表论文:Nonvolatile and Nonflammable Sulfolane-Based Electrolyte Achieving Effective and Safe Operation of the Li–O2 Battery in Open O2 Environment

摘要:The Li–O2 battery should operate effectively/safely in an open O2 environment for practical applications, but not trapped in sealed/closed atmosphere. However, the typical use of volatile and flammable electrolyte restricts Li–O2 battery to be able to be running in open O2 environment. We report herein, for the first time, a highly electrochemical reversible Li–O2 battery operated in an open O2 environment, i.e., under the condition of keeping O2 flowing continuously based on a nonvolatile and nonflammable sulfolane (TMS) solvent. The electrochemical irreversibility of Li2O2/O2 conversion and incompatibility between Li metal anodes and electrolyte have been addressed via dissolving LiNO3 in concentrated TMS electrolyte. The tuned electrolyte not only enables a stable solid electrolyte interphase (SEI) with conformal inorganic components (including LiF, LiNxOy, and Li2O) that promotes a uniform Li electro-plating/stripping process but also results in a low charge overpotential, a stable discharge terminal plateau, and reversible O2 generation of the Li–O2 battery conducted in an open O2 environment.

文章链接:https://pubs.acs.org/doi/10.1021/acs.nanolett.1c04537