In this paper, we review the progress that has been made in the use of functionalized ethers in lithium ion batteries and the synthesis strategies for them, and present the future research direction of functionalized ethers in lithium ion batteries.
Can ether-based polymer electrolyte be used in solid-state lithium batteries?
Ether-based polymer electrolyte shows promising potential for application in solid-state lithium batteries owing to its cost-effectiveness, excellent flexibility, and above all, remarkable stability to lithium metal anode. However, it still suffers from challenges related to low ionic conductivity and inferior oxidation resistance.
Can ether-based electrolytes provide high-performance lithium metal anode (LMB) protection?
Herein, we focus on summarizing the use of additives in ether-based electrolytes to enable high-performance LMBs. The impact of additives in electrolytes on lithium metal anode (LMA) protection, cathode protection, extreme temperature operation, and fast charging for LMBs are systematically discussed.
Can cyclic ethers be used in lithium ion batteries?
This SEI can not only effectively prevent the growth of lithium dendrites, but also improve the cycle life and safety of the batteries. However, the use of cyclic ethers in LIBs is limited due to their high chemical reactivity with LMA.
Are ether based electrolytes better than ether-based solvents?
Ether-based solvents generally show better affinity for lithium metal, and thus ether-based electrolytes (EBEs) are more inclined to form a uniform and thin solid electrolyte interface (SEI), ensuring the long cycle stability of the lithium metal batteries (LMBs).
However, most of linear ethers can react with lithium metal to form a stable SEI, thus preventing the direct contact between lithium metal and electrolyte, thereby reducing the occurrence of side reactions. However, the use of linear ethers in LIBs is limited due to their poor chemical stability under high voltage.
Can ether based electrolyte stabilize cathode and anode interface?
However, both the cathode and anode face serious interface problems in such batteries. Developing ether-based electrolyte is a comprehensive strategy to stabilize the cathode and anode interface simultaneously. However, the poor oxidation stability of ether and the corrosion of LiFSI on aluminum hinder their practical large-scale application.