Sodium transition metal silicates
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United States of America Patent
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Feb 12, 2019
Grant Date -
Jun 1, 2017
app pub date -
May 22, 2015
filing date -
May 22, 2014
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Abstract
The present invention is directed to an electrode comprising one or more sodium-containing transition metal silicate compounds of the formula: AaM1bM2cXdOe wherein A comprises sodium or a mixture of sodium with lithium and/or potassium M1 comprises one or more transition metals, wherein M1 is capable of undergoing oxidation to a higher oxidation state, M2 comprises one or more non transition metals and/or metalloids, X comprises at least 40 mol % silicon, a is >0, b is >0 c is ≥0, d is ≥1, e is ≥2, wherein the values of a, b, c, d, and e are selected to maintain the electroneutrality of the compound; and further wherein the one or more sodium-containing transition metal silicate compounds does not include Na2MnSiO4.
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