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Issue 1, 2017
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Alternative strategy for a safe rechargeable battery

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Abstract

The advent of a Li+ or Na+ glass electrolyte with a cation conductivity σi > 10−2 S cm−1 at 25 °C and a motional enthalpy ΔHm = 0.06 eV that is wet by a metallic lithium or sodium anode is used to develop a new strategy for an all-solid-state, rechargeable, metal-plating battery. During discharge, a cell plates the metal of an anode of high-energy Fermi level such as lithium or sodium onto a cathode current collector with a low-energy Fermi level; the voltage of the cell may be determined by a cathode redox center having an energy between the Fermi levels of the anode and that of the cathode current collector. This strategy is demonstrated with a solid electrolyte that not only is wet by the metallic anode, but also has a dielectric constant capable of creating a large electric-double-layer capacitance at the two electrode/electrolyte interfaces. The result is a safe, low-cost, lithium or sodium rechargeable battery of high energy density and long cycle life.

Graphical abstract: Alternative strategy for a safe rechargeable battery

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Article information


Submitted
03 Oct 2016
Accepted
09 Dec 2016
First published
09 Dec 2016

Energy Environ. Sci., 2017,10, 331-336
Article type
Paper

Alternative strategy for a safe rechargeable battery

M. H. Braga, N. S. Grundish, A. J. Murchison and J. B. Goodenough, Energy Environ. Sci., 2017, 10, 331
DOI: 10.1039/C6EE02888H

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