Faradion Limited

Ruth Sayers

Jeremy Barker

Richard Heap

The invention relates to novel non-aqueous electrolyte compositions comprising: a) a sodium-containing compounds of the general formula NaMFand b) a solvent system comprising a first solvent component i) which comprises propylene carbonate and one or more further organo carbonate-containing solvents, and a second solvent component ii) which comprises one or more glycol diethers and/or one or more glycol ether acetates; wherein the molar ratio of propylene carbonate:one or more glycol diethers and/or one or more glycol ether acetates is in the range 1:0.1 to 1:3.

Non-aqueous electrolyte compositions

The invention relates to electrodes comprising doped nickelate-containing compositions comprising a first component-type comprising one or more components with an O3 structure of the general formula: AMvMwMxMyMzOwherein A comprises one or more alkali metal selected from sodium, lithium and potassium Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, and Mcomprises one or more metals in oxidation state 3+ wherein 0.85&#x2264;a&#x2264;1; 0&#x3c;v&#x3c;0.5; at least one of w and y is &#x3e;0; x&#x2265;0; z&#x2265;0; and wherein a, v, w, x, y and z are chosen to maintain electroneutrality; together with one or more component-types selected from a second component-type comprising one or more components with a P2 structure of the general formula: A'&#x3c;Mv&#x2032;Mw&#x2032;Mx&#x2032;&#x3c;My&#x2032;&#x3c;Mz&#x2032;Owherein A&#x2032; comprises one or more alkali metal selected from sodium, lithium and potassium; Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2+, Mcomprises one or more metals in oxidation state 4&#x2212;, and Mcomprises one or more metals in oxidation state 3+ wherein 0.4&#x2264;a&#x2032;&#x3c;1; 0&#x3c;v&#x2032;&#x3c;0.5; at least one of w&#x2032; and y&#x2032; is &#x3e;0; x&#x2032;&#x2265;0, preferably x&#x2032;&#x3e;0; z&#x2032;&#x3e;0; and wherein a&#x2032;, v&#x2032;, w&#x2032;, x&#x2032;, y&#x2032; and z&#x2032; are chosen to maintain electroneutrality; and a third component-type comprising one or more components with a P3 structure of the general formula: A&#x2033;M1&#x2033;M2&#x2033;MMMOwherein A&#x2033; comprises one or more alkali metals selected from sodium, lithium and potassium; Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2&#x2212;, Mcomprises one or more metals in oxidation state 4+, and Mcomprises one or more metals in oxidation state 3+ wherein 0.4&#x2264;a&#x2033;&#x3c;1, 0&#x3c;v&#x2033;&#x3c;0.5, At least one of w&#x2033; and y&#x2033; is &#x3e;0; x&#x2033;&#x2265;0; z&#x2033;&#x2265;0; and wherein a&#x2033;, v&#x2033;, w&#x2033;, x&#x2033;, y&#x2033; and z&#x2033; are chosen to maintain electroneutrality.

Compositions containing doped nickelate compounds

The invention relates to electrodes comprising doped nickelate-containing compositions comprising a first component-type comprising one or more components with an 03 structure of the general formula: AMV MW MX My MZ Owherein A comprises one or more alkali metal selected from sodium, lithium and potassium; Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, and Mcomprises one or more metals in oxidation state 3+ wherein 0.85&#x2264;a&#x2264;1; 0&#x3c;v&#x3c;0.5; at least one of w and y is &#x3e;0; x&#x2265;0; z&#x2265;0; and wherein a, v, w, x, y and z are chosen to maintain electroneutrality; together with one or more component-types selected from a second component-type comprising one or more components with a P2 structure of the general formula: A'&#x3c;M&#x2032; V&#x2032; M&#x2032; W&#x2032; M&#x2032; X&#x2032;&#x3c;Mwherein A&#x2032; comprises one or more alkali metal selected from sodium, lithium and potassium; Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, and Mcomprises one or more metals in oxidation state 3+ wherein 0.4&#x2264;a&#x2032;&#x3c;1; 0&#x3c;v&#x2032;&#x3c;0.5; at least one of w&#x2032; and y&#x2032; is &#x3e;0; x&#x2032;&#x2265;0, preferably x&#x2032;&#x3e;0; z&#x2032;&#x3e;0; and wherein a&#x2032;, v&#x2032;, w&#x2032;, x&#x2032;, y&#x2032; and z&#x2032; are chosen to maintain electroneutrality; and a third component-type comprising one or more components with a P3 structure of the general formula: A&#x2033;M1&#x2033;M2&#x2033;MMMOwherein A&#x2033; comprises one or more alkali metals selected from sodium, lithium and potassium; Mis nickel in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, Mcomprises one or more metals in oxidation state 2+, Mcomprises one or more metals in oxidation state 4+, and Mcomprises one or more metals in oxidation state 3+ wherein 0.4&#x2264;a&#x2033;&#x3c;1, 0&#x3c;v&#x2033;&#x3c;0.5, At least one of w&#x2033; and y&#x2033; is &#x3e;0; x&#x2033;&#x2265;0; z&#x2033;&#x2265;0; and wherein a&#x2033;, v&#x2033;, w&#x2033;, x&#x2033;, y&#x2033; and z&#x2033; are chosen to maintain electroneutrality.

Growing community of inventors

Sheffield, United Kingdom

Ruth Sayers