Exploration of fluorine-free electrolytes with superior functions

进行了探索性研究，其中确定了几种适合的碳酸盐和醚溶剂用于与锂金属阳极相容的基于LiPF 6的电解质。对于通常与LiPF6不相容的醚，开发了新的电解质制备方法和电池配置。通过增加盐浓度和添加剂，通过溶剂化结构调节进一步优化电解质，这可能导致锂阳极上改进的（即薄的无机）固体电解质界面（尚待表征）。所获得的库仑效率和循环寿命与基于昂贵盐（例如LiFSI）的电解质的最新性能相当，所述昂贵盐（与LiPF 6相反）在商业上不可行。

An exploratory study was performed in which several suitable carbonate and ether solvents were identified for a LiPF6 based electrolyte compatible with a lithium metal anode. For the ethers, which are generally incompatible with LiPF6, new electrolyte preparation methods and cell configurations were developed. The electrolytes were further optimized through solvation structure regulation by increasing the salt concentration and additives, which presumably leads to an improved (i.e. thin, inorganic) solid electrolyte interphase on the lithium anode (yet to be characterized). The obtained Coulombic efficiencies and cycle lifetimes are comparable with the state-of-the-art performance for electrolytes based on expensive salts (e.g. LiFSI) that are (contrary to LiPF6) not commercially viable.