Affiliation:
1. School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, UK.
Abstract
Improving Lithium Batteries
Lithium-oxygen batteries have similar volumetric energy densities to lithium-ion batteries, but, because the oxygen part of the battery can be extracted from the air, they have a significant advantage in their gravimetric energy densities. One of the fundamental problems plaguing the nonaqueous Li-O
2
system is that the Li
2
O
2
that forms on discharge must be completely reversed on charging, but for most systems, a range of side products form instead of Li
2
O
2
.
Peng
et al.
(p.
563
, published online 19 July) show that by using dimethyl sulfoxide as the electrolyte, and a porous gold cathode, they can get reversible production and removal of Li
2
O
2
during discharge and charge cycles. Furthermore, the electrolyte-electrode system operates with much faster kinetics than carbon electrodes.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
1785 articles.
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