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LithiumOxygen Electrochemistry in Non‐Aqueous Solutions
Author(s) -
Sharon Daniel,
Hirshberg Daniel,
Afri Michal,
Garsuch Arnd,
Frimer Aryeh A.,
Aurbach Doron
Publication year - 2015
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201400135
Subject(s) - chemistry , electrochemistry , electrolyte , lithium (medication) , oxygen , aqueous solution , solvent , combustion , decomposition , chemical engineering , electrode , organic chemistry , medicine , engineering , endocrinology
Abstract Pairing lithium and oxygen in aprotic solvents can theoretically lead to one of the most promising electrochemical cells available. If successful, this system could compete with technologies such as the internal combustion engine and provide an energy density that can accommodate electric vehicle demands. However, there are many problems that have inhibited this technology from becoming realistic. One of the main reasons is capacity fading after only a few cycles, which is caused by the instability of electrolyte solutions in the presence of reduced oxygen species like O 2 .− and O 2 2− . In recent years, using various analytical tools, researchers have been able to isolate the breakdown products arising from the reactions occurring between the aprotic solvent and the reduced oxygen species. Nevertheless, no solvents have yet been found that are fully stable throughout the reduction and oxidation processes. However, an understanding of these decomposition mechanisms can help us in designing new systems that are more stable toward the aggressive conditions taking place in LiO 2 cell operation. This review will include analytical studies on the most widely used solvents in current LiO 2 research.