Replacing liquid electrolytes with solid electrolytes (SEs) is one of the most promising strategies to address this issue. The emerging solid-state lithium metal batteries (SSLMBs) provide a new chance to achieve both high energy and high safety by matching high-voltage cathodes, inherently safe SEs, and high-capacity lithium metal anodes.
Ionic liquid/poly (ionic liquid) (IL/PIL)-based electrolytes enable batteries with good safety, high energy/power density and long-term stability. This review focuses on the applications of IL/PIL-based liquid, quasi-solid, and solid electrolytes and electrolyte additives in lithium batteries.
This PIL based electrolyte showed excellent battery performance in a LIB with high thermal stability up to about 330 °C, low Tg (glass transition temperature) at near 54 °C and ionic conductivity as high as 10 −4 S cm −1 at low medium temperature.
To enhance the electrochemical performance of such batteries, rational electrolyte design and regulated interfacial chemistry are crucial for obtaining high-energy batteries that utilize high-capacity lithium metal or silicon anodes coupled with high-voltage cathodes.
Although the imidazolium-based ionic liquid itself has high conductivity, the high viscosity makes it difficult to be used as the electrolyte in lithium metal batteries. It is usually added into the solid-state electrolytes as the plasticizer to improve the Li+ ion conductivity of electrolytes.
According to different cation structures, ionic liquids used in lithium metal batteries can be divided into imidazolium, chain quaternary ammonium, pyrrolidinium and piperidinium based ionic liquids. 2.1.1. Imidazolium-based ionic liquids
Ionic liquid/poly(ionic liquid) (IL/PIL)-based electrolytes enable batteries with good safety, high energy/power density and long-term stability. This review focuses on the applications of IL/PIL-based liquid, quasi-solid, and solid electrolytes and …