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Issue 7, 2015
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Lithium salts for advanced lithium batteries: Li–metal, Li–O2, and Li–S

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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

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Article information


Submitted
19 Apr 2015
Accepted
29 May 2015
First published
01 Jun 2015

This article is Open Access

Energy Environ. Sci., 2015,8, 1905-1922
Article type
Review Article
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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