Sharp Kabushiki Kaisha Corporation

Faradion Limited

Robert Gruar

Emma Kendrick

Motoaki Nishijima

Hirotaka Mizuhata

Yuichi Kamimura

Isao Asako

Takuya Otani

The invention relates to novel materials of the formula: AMMMx02wherein A is one or more alkali metals; Mcomprises one or more redox active metals with an oxidation state in the range +2 to +4; Mcomprises tin, optionally in combination with one or more transition metals; Mcomprises one or more transition metals either alone or in combination with one or more non-transition elements selected from alkali metals, alkaline earth metals, other metals, metalloids and non-metals, with an oxidation state in the range +1 to +5; wherein the oxidation state of M1, M2, and M3 are chosen to maintain charge neutrality and further wherein &#x3b4; is in the range 0&#x2264;&#x3b4;&#x2264;0.4; U is in the range 0.3&#x3c;U&#x3c;2; V is in the range 0.1&#x2264;V&#x3c;0.75; W is in the range 0&#x3c;W&#x3c;0.75; X is in the range 0&#x2264;X&#x3c;0.5; and (U+V+W+X)&#x3c;4.0. Such materials are useful, for example as electrode materials, in rechargeable battery applications.

Tin-containing compounds

Materials are presented of the formula: The formula includes compounds that are oxygen deficient. Further the oxidation states may or may not be integers i.e. they may be whole numbers or fractions or a combination of whole numbers and fractions and may be averaged over different crystallographic sites in the material. Such materials are useful, for example, as electrode materials in rechargeable battery applications. Also presented is a method of preparing a compound having the formula AMMO.

Layered oxide materials for batteries

Materials are presented of the formula:AMMO,where A is sodium or a mixed alkali metal including sodium as a major constituent;

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Swindon, United Kingdom

Robert Gruar