Issue 7, 2015

Lithium salts for advanced lithium batteries: Li–metal, Li–O2, and Li–S

Abstract

Presently lithium hexafluorophosphate (LiPF6) is the dominant Li-salt used in commercial rechargeable lithium-ion batteries (LIBs) based on a graphite anode and a 3–4 V cathode material. While LiPF6 is not the ideal Li-salt for every important electrolyte property, it has a uniquely suitable combination of properties (temperature range, passivation, conductivity, etc.) rendering it the overall best Li-salt for LIBs. However, this may not necessarily be true for other types of Li-based batteries. Indeed, next generation batteries, for example lithium–metal (Li–metal), lithium–oxygen (Li–O2), and lithium–sulfur (Li–S), require a re-evaluation of Li-salts due to the different electrochemical and chemical reactions and conditions within such cells. This review explores the critical role Li-salts play in ensuring in these batteries viability.

Graphical abstract: Lithium salts for advanced lithium batteries: Li–metal, Li–O2, and Li–S

Article information

Article type
Review Article
Submitted
19 Apr 2015
Accepted
29 May 2015
First published
01 Jun 2015
This article is Open Access
Creative Commons BY license

Energy Environ. Sci., 2015,8, 1905-1922

Author version available

Lithium salts for advanced lithium batteries: Li–metal, Li–O2, and Li–S

R. Younesi, G. M. Veith, P. Johansson, K. Edström and T. Vegge, Energy Environ. Sci., 2015, 8, 1905 DOI: 10.1039/C5EE01215E

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