Abstract
Although lithium–air batteries are attractive because of their huge energy density, further improvements in cycle performance are required for practical use. The most serious problems are the increase in charging voltage at the cathode and the formation of Li dendrites at the anode during the charging process. Soluble-type catalysts or redox mediators (RMs) are known to be effective in lowering the charge voltage to the redox potential, although they cannot inhibit Li dendrite formation. We have recently shown that LiBr–LiNO3 mixed anion electrolytes can simultaneously alleviate both of these problems. LiBr effectively functions as an RM that lowers the charge voltage to ~3.5 V and suppresses side reactions. LiNO3 acts synergistically with LiBr to form a thin, dense, and uniform SEI film on the surface of Li metal. As a result, Li dendrite was effectively suppressed and even epitaxial growth of Li metal was observed.
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Kubo, Y. (2021). Electrolytes with Redox Mediators. In: Kanamura, K. (eds) Next Generation Batteries. Springer, Singapore. https://doi.org/10.1007/978-981-33-6668-8_41
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DOI: https://doi.org/10.1007/978-981-33-6668-8_41
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