The invention provides a negative electrode material for a lithium ion secondary battery, including a composite particle of a first particle containing a carbonic substance A and a second particle containing silicon, which are combined with a carbonic subs...

An alkali metal/oxyhalide cell which provides greatly enhanced low temperature performance and increased safety during operation, is described. The preferred cell includes a novel combination of halogens and/or interhalogens incorporated into the lithium/S...