| http://www.w3.org/ns/prov#value | - Use can also be made of materials capable of reversibly adsorbing and releasing lithium ions, including polymers such as polyacetylene and polypyrrole, and oxides such as SnO2. [0069] Many of the carbonaceous materials that may be used as the negative electrode active material in batteries are themselves electron-conductive, and would thus appear to be inappropriate for the purposes of the inventi
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