This paper reports on the electrochemistry of a new series of layered manga
nese oxide cathodes for lithium-ion cells. The layered structure is stabili
zed by the partial substitution of the manganese by chromium and lithium at
oms and by the partial or complete oxidation of the manganese to the +4 oxi
dation state. The series covers the range of compositions LixCryMn2-yO4+z f
or which 2.2 < x < 4, 0 < y < 2 and z greater than or equal to 0. Crown Cop
yright (C) 2001 Published by Elsevier Science B.V. All rights reserved.